Pragmatic 86: Segway Evolution

4 May, 2018


Self-balancing vehicles started with the Segway in 2001, but since then they’ve evolved, losing their handle bars and even losing a wheel. We look at how they’ve evolved over time, how safe they are and how potentially crazy John is, since he’s started riding one.

Transcript available
Welcome to pragmatic pragmatic discussion circling the practical application of technology we will treat all ideas are transformed nothing as simple as it seems on your host Gigi today I'm joined by Vic Hudson is going is going out to John are you going pretty good because I have been itching to talk about this topic for quite a while and some people may laugh in fact I suspect some well and that's okay is fine I can take it arm maybe, or make sense about 20 minutes but for the beginning our last episode when we spoke we talked about multimodal transportation and we talked a bit about Segways while I actually want to do a entire episode on Segways mainly because I think they call and because I'm kinda writing what every now and then like so without further ado let's dive in arm when I tell you about Segways in the evolution of Segways arm what really talk about is arm self balancing devices not electric skateboards or power long boards are devices that balance themselves and not electric kick scooters either so those are the ones like it's a scooter but literally kick scooter but it's got a battery and motor in its power to write armrests ultimate them either onto Matt wants a balance themselves see push a magic binder turn on and it magically stays upright and you like wow it's stand upright anyway right so it all started way back in the 90s like so many things arm mighty not that many things anyway are back in our 1990 are there was this thing called the I bot iB OT anyway and this is an Apple device car alas and I wasn't as it wasn't no answer guy called Dean came in he partnered up with our decker and the Johnson & Johnson to develop and produce the I bot in the I bot as the name doesn't really tell you how the lot is actually a wheelchair that can climb stairs now done a few seemly things and not but it's it's it's kinda like a wheelchair with a series of two or three settlers like to larger wheels and a small wheel on a hinge mechanism at the bottom end it actually allows people to like it locks into stairs and can actually crawl upstairs very gradually like think of it like the stairs are the teeth in the years this thing is right is basically stepping up those gears though those teeth articles visualising a triangle with smaller triangles attached at each point kinda like that but the triangles that had the touch of the ground directly wheels not triangles but yes, at that but the point is it can also lift the chair up so the person sitting I can look into the eyes of an average person of average height which is also cool so that you yet now the first prototype is the I bot were rum is about 1992 but it was announced on dateline publicly in 1999 at that US$0.50 million been sunk into developing this thing and was nationally approved by the FDA for years laugh that so during the development of that technology they also worked on a non-medical product that used some of the same technology the self balancing aspects and this came to be known as the Segways scooter to segue Incorporated was founded in July 1999 to focus on the non-medical application specifically of the self balancing tech that they developed for the I bot now segue Incorporated has a little bit of an interesting history so to segue PT your personal transporter are was a two wheeled mobility platform at literally a platform the joints to wheels that are central post and handlebar the topic and hold onto was released in December 2001 but it was a few months before delivery started getting to customers and initially the company predicted there will be 40,000 unit sales per year they buy their prediction in December 2001 they revise this to between 50 200,000 units to the end of 2002 so yeah big numbers right unfortunately unfortunately reality was not so kind and by 2003 they'd only sold 6000 of them to be honest and impressed they sold 6000 kn are good by September 2006 nearly 5 years later after it had launched that only sold 23 1/2 thousand globally it did so take the world by storm it did not know did not definitely not so in a huge loss of trust segue had to recall every single one of them to fix a firmware issue with the personal transporter is where they could end up going in reverse unintentionally which obviously could lead to righter injury so they didn't help either in 2007 an estimated US$100 million had been invested solely developing the segue PT models and the resulting sales indicated that the company was struggling financially despite the fact they claim they won't in March 2009 segue Incorporated claimed it had then shipped over 50,000 units which is about 6000 6/2 thousand year average are really not that great and not much acceleration if any from the first year is on sale in 2010 segue Incorporated was bought by a group of partners they were led by British entrepreneur Jimmy Hassell than now he unfortunately died in September that same year he fell victim to injuries he sustained from falling off a cliff whilst here I wonder if you can imagine this whilst ironically writing a segue yet year you can't make that sort of thing up bombing role and but no one would dare make that up unbelievably true and how's that for irony fear I remember reading about it when it happened year's anyway they have it in February 2013 a company called Summit strategic investments LLC acquired segue Incorporated in the British partners and in September 2014 it filed an infringement notice with the US International Trade Commission over patent breaches by several China-based manufacturers including in motion Road Rob step robot and nine bot now perhaps not to coincidentally the following April segue Incorporated was acquired by nine bot Inc and nine bot had just raised at that .80 million in capital between Shami and Sequoia capital in Silicon Valley you can read into that whatever you like but that's just like well you can't have a patriotic way to making your way you exactly how AAA anyway so why carrying on about segue Incorporated specifically now the timeline matters because effectively the segue PT was where it all started but once it did start others took that idea and tweaked it and ran with it well to varying degrees so in 2004 guy called Trevor Blackwell some people will remember him as the co-founder of Y commentator now he developed an open source single wheel electric unicycle he called the unicycle sizes that would unicycle the knee in front anyway not a great name it was never turned into a commercial product but he proved it could be done are focus designs however was our Incorporated 2007 and between VC funding and appearance on shark tank they released their self balancing unicycle with a seat on its inception in October 2008 the year their product name was the SBU self balancing unicycle again not a catchy name but anyway arm it's been through three generations their final unit the SBU V3 yet that's the self balancing unicycle version 3 again being on the naming sold for 1795 US which is considerably less then a segue because as we talked about last time segue arm.the eye to communal models are they weighing about $6000 so this thing was a bargain at that kind of you know price it went 0 to 10 miles an hour which is 0 to 16 km an hour in three seconds which is pretty pretty good top speed of 12 1/2 miles an hour just 20 climbers in our and same as segue and arrange about 30 miles or 48 km and it weighed only 12 kg which is £27 so focus designs also contributed is to the development of the solo wheel the electric unicycle without a seat and that sort of the iconic thing that we know today as an EU see your electric unicycle now that was developed primarily by man by the name of Sean Chan and he patented his solo wheel in March 2010 now Chan is one of those really prolific arm inventors arm in especially in the space of self balancing devices he also developed orbital wheel skates arm ultra drain a lunar cycle and the more more well-known hopper tracks and a hub attracts Zachary licensed to raise RAZ OR do they also makes scooters like push scooters arm and my kids my kids back to got quite a few razor scooters right and easily an electric scooter is normal scooters now hopper tracks in particular was heavily cloned by Chinese manufacturers and Chan was so offended he actually went to China personally just prior to Christmas in 2015 to see it for himself now hopper tracks sold for about $1000 US at that point they'd only sold a few thousand units now the Chinese arm knockoff models if you like they'd made more than a million already by that point at a fraction of the price so in this hour interviews Lincoln the show notes if you registered is an interesting read Chan was quoted as saying the hopper tracks to me it's just a toy but obviously a very popular one so that's the majority the history covering about people and key companies along the way within this different costs and trends is worth mentioning one of the things that brought the prices down has been the falling prices of lithium batteries so most of these army seas and hopper boards are have far lifeboat for batteries which is not it's not a word that's at its chemical formula lithium iron phosphorus arm oxygen for the God railroad off the toe yet life Po for anyway that might those boundaries arm they fell in price 80% between 2011 and 2017 that's huge and even at those prices the battery still accounts for between 1/4 to 1/2 of the cost of the EEC now because of the power to wait in the range and that people typically want to use these things for almost all you see is use lithium batteries and and and are not the same type of using a laptop but there the same ones used by Tesla and first solar our deep cycle yellow off grid power backup applications so these are the serious hard-core once opposed to the super ultralightweight high energy density once these aren't quite as high energy density is what you'll find a mobile phone or laptop okay so first of all the stress of the problems with these things arm and first of all the problems with the press and it came from the Chinese knockoff boards almost entirely there were some very badly built ones and sheep models that caught on fire and burn down the house literally picked it year not burn down the house in a good way so the US consumer product safety commission in May 2015 found that manufacturing defects had led to 60 fires over 20 states in the previous year in July 2016 order recall of half a million units from eight different manufacturers with the swag way X1 consisting of 267,000 recall out of the half million figure coach year not good now directly as a result of this and of a handful of other incidents on airlines airlines have essentially banned them out of fear that they will cause a fire irrespective of where they carry on or stowed luggage obviously some airlines don't mind them but Alzheimer banned them entirely some airlines now handle let you take the Myrdal limit the maximum size the battery so you carry on capacity for example might be of some of between hundred Watt hours to hundred 60 what hours that's between the IOTA and the FAA are individual airlines of course can have their own rules could be stricter are some models feature removable batteries for airlines that have restrictions to carry on but not the stowed boundaries funny thing I'm not really sure how often this is an issue except when they're being shipped to you from overseas it's unlikely that it's gonna be a problem for Meeks anytime soon to be honest and I don't know how many people travel on a plane and take the unicycles with them all the they have amount guests so I deny their relative without year unicycle American Express card but not anyhow all right so what are these things and let's just would be specific that I describe exactly what Akers maybe some people don't know I haven't seen photos as Lisa Charlotte obviously but just to go through an audible or deeply are a Segway is a flat solid rectangular board that you stand on with both feet parallel next to each other with a wheel on each end of that board in addition there is a poll attached to the centre front of the board with handles between chest and shoulder height for you to hold onto with your hands sound like your good descriptive segue death kill a variety hopper boards also some people call them swag ways which I don't really get anywhere arm a flat rectangular board with a hinged in the centre that you stand on with both feet parallel next to each other 1 foot on the left side 1 foot on the right side of the centre hinge with a wheel on each end of the board there is no poll on the twist angle of the centre pivot is about plus and -30° but that varies from model to model okay that's horrible and no it does not hover like mighty McFly's of the board did in 2015 I'll hang on its 2018 and inter 15 million have hobbles I can back to the future and still pest fine anyway moving on okay and E you see or electrically unicycle also call a solo wheel named after the first model that was released by Sean Chen arm a single larger wheel with a fixed housing that covers the sides and top of the wheel with a pedal on either side you stand with 1 foot on either side of the wheel with 1 foot on each pedal there is no poll and your side to side balance is entirely your problem already so that's what we're talking about so here's the interesting part about are in the last episode we we talked will be about arm usability so lets it go into a bit adept now about regulations where can use this thing specifically in different parts of the world now the problem is that there are 70 different rules around the world I cannot possibly cover them all and if I do I'm sure that by the time I say then they'll be out of date and at least one country or one province of one country or one city in one province and one country so on a restrict myself to local laws here in Queensland Australia and in the United States and will pick arm California because while you know California all right so in Californian states electrically motorised boards can be used by those over 16 years of age at speeds of up to 15 mph is 20 4K is now on the streets where the speed limits is under 35 mph or 56 case now so you can write them on the road so long as the posted speed limit is less than 35 riders must wear a helmet and comply with all road rules and that includes they can't have a blood alcohol reading above whatever limit is there are boards must be speed limited to 20 mph the two columns now they must be designed to carry only one person the motor must be less than a thousand watts in size and the use of these devices on sidewalk and footpath is at the jurisdiction of cities and counties to determine so that's California broadly speaking around the rest of the states arm Segways are allowed on sidewalks in most states though some municipalities have banned them so that may vary many states will allow them on bicycle lanes and roads so long as the speed limit is up to 2425 mph but again it varies depending upon where you are that states in specifically California now my own backyard is a little bit more precise and not precise at the same time it'll be all long-winded okay so here we go includes habit brace yourself in Queensland because innocent in Australia pride ourselves on legislating ourselves to death anyway a personal mobility device can be used on road related areas such as paths and nature strips provided it is used fee is designed for use by single person is self balancing while it is in use is powered by an electric motor has two wheels that operate on a single axis so straightaway warps that doesn't cover unit arm electric unicycles it has a control to speed limit to 12 climbers now or less notice the wording it has to have a control to limit the speed doesn't say be applied as a member yet it has a maximum speed of 20 km/h well if I have a maximum speed of 50 climbers now but I set the speed limit to 20 km an hour that means I have a maximum speed of 20 columns now anyway nevermind has a maximum width of 850 mm see the thinking of a Segway when I wrote this as it has a maximum weight of 60 kg again Segways ranging in weight between 45 to 60 kg that's the thinking of when they wrote this it's almost like that of the spec sheet of a Segway and then just copy down said yep that's legislation baby anyway as you hear some people do badly anyway are so children under 12 must not use a personal mobility device at any time when using a personal mobility device you must be supervised by an adult if you are between 12 and 15 years of age you must wear an approved bicycle helmet that is securely fitted you must keep left on paths obviously for an estate to be keep right you must give ways to pedestrians on paths keep left if the state to be keep right of oncoming bicycles and other personal mobility devices on the path must have a working warning device such as a bell or horn so yet warps these don't unicycles Segways don't have horns or bells warps are they must have a working flashlight flashing or steady white light on the front and a red or flashing light and reflector at the rear when travelling at night or in hazardous conditions so another warps out my particular one doesn't now you're allowed to stay on your personal mobility device to cross the road at designated crossings only when you are operating a personal mobility device you must not travel faster than 12 climbers in our which is 7.5 mph so why they say before maximum speed 20 K is now in a L faster than 12 travel along a road unless it is impractical not to or if there is an obstruction on the path or nature strip and in those cases you are about to travel up to 50 m on the road so another words you can write along the road under short distances if something like the sidewalk of the sidewalks closed verb something I know they're excavating it all whatever or the police have taped off because someone beat up the other guy on the personal mobility device anyway your Q's are a mobile fire handheld mobile phone in a way to carry any passengers you cannot drink or be under the influence of any alcohol you cannot travel past a personal mobility devices prohibited sign so the sign says no PMD is the no PND's local council or landowners may also prohibit PMD's in areas such as malls espionage or jetties right that's it better well that is all for the Queensland regulations so the one thing I want to point out though is speed limits on bike parts now this is an interesting bugbear of mine right so where there is no set speed limits specified the speed limit defaults to 50 km/h which is about 30 miles an hour that's pretty fast you know if you're on a narrow bike Wayne you're doing back on a speed you know you should really be riding on a road that saw speed but there you have you playing it safe you wouldn't would you ride on a sidewalk doing 30:30 miles an hour on a bike I would night nicely I would neither it's too narrow people come our walk and five young enough time to stop going too fast so anyway there are some roads sorry some cycleways I should say that our speed limited for that reason so locally in Brisbane the story Bridge is a 20, our speed limit the goodwill bridges a 10 km hour speed limit problem is those speed limits are actually enforced so a cyclist that hits a pedestrian at 50 climbers in our is gonna do as much damage as someone riding electric unicycles that speed bringing much maybe more because of a big bicycle logo bicycles well bottom line though it her it's gonna hurt and yet cyclists can go up to 50 K is now but a personal mobility device can't it can only go according to this 12 K is now which I don't get that anyway yeah and the motor in okay so making it my air wheel so I see happening wheel arm and it will X3 so how do I make it compliant with those regulations why didn't I didn't get a helmet would legalise on it I have a helmet yes Sol Tabor have drugged up with a light summer there is no point trying to fix a bell sounded to the air wheel since a you will get broken if I fall and yes I still fall from time to time as thing takes a tumble be if I tried leaned down and reached to flick a bell to sound the bell in prison lose my balance and fall off anyway source the point that overcome this I looked into a remotely activated electronic bell but that's Conover Thompson do that instead I got into a standard cheap bicycle bell I adjusted the whole size to fit my index finger and I wear that when I ride the unicycle I can just flick it on my index finger easy as you like works fine so no one can pull me up not having a bell Lego I added some front and rear lights into the pedal holes the pedal has several holes in them for support well not the support arm did the weight reduction actually but you can put small light thing I can narrow like a triple a kind of diameter pencil torch they may come specifically for these models so I got a couple those for the back in a couple for the front but because the wants of the front aren't bright enough I also carry torch arm that is fitted to my helmet and to be verbally honest I got the idea from watching other cyclists is pretty common yet arm right now in the end it also I think I see fixing it to helmet safety safer because it it follows we ahead looks so you turn left right looks in the life policy which is safer anyway because you can you see we are looking yet right I fitted some reflective tape are strips to the front and rear are both the forward and side facing our faces of the unicycle arm so in low visibly conditions if it's rear on the side on arm at the lights and the reflectors will clearly show what direction I'm I'm oriented in so that's that that satisfies that one technically if I make phone calls I do sometimes I'm using my airport so technically is not handheld so that makes it okay and arm in my state the only law the owner the in in my state any law that I'm really slightly bending is the one wheel versus two wheel thing I suspect that'll be amended at some point near future as these things become more popular there now for the interesting part arm before I talk about my experiences and what I've gotten why and how crazy I am arm apparently I was about how it works because it is something that I find fascinating is such a simple idea arm but it's our it's interesting how they pulled off so almost all electric unicycles use brushless DC motors to drive the wheels or we should say and because the single wheel the DC motor is the actual wheel insofar as the wheel hub is the motor so with the harbour and see don't have any gearing or anything like that so it it says bit of weight are so with the hub the permanent magnets form either the core arm otherwise known as the rotor or in the case of hollow wheels they form the inner ring like some designs like fast will ring all the solar wheel orbit is less of these are shown as these ones actually have a hole through the middle so you can let you put your arm through the hole in the middle arm so those look really really cool and obvious see that the lighter as well armed there also have a price to match that of mine that soap brushless DC motors have a bunch of different names you've got brushless permanent magnet permanent magnet AC motors and synchronous motors and this there's others but those the most common names for them so they're essentially an inverted DC motor so DC motor has a rotor that spins with a series of slots on the shaft typically and each slot has a pair of conductive pads and those connective those conductive pads are connected to the windings inside the rotor so a set of brushes and most common brush material is carbon arm for high-power applications are and I worked on carbon I worked on carbon brushes quite a lot when I was working in the arm are an open cut coal mine back 20 years ago are changed a few sets of those have used quite a few sets of those arm and the brushes that connects the DC voltage to one slot at a time or two or three depending on the design but anyway thanks every anyway bottom line is arm this creates arm a circuit in that circuit and the current finance circuit creates a magnetic field in that winding in the rotor so the permanent magnets are on stationary part of the motor that is bolted to the ground or usually bolted to the ground by varying the DC voltage that we apply to the rotor we can vary the strength of the magnetic field so for a fixed load on the motor this will proportionally change the speed of the rotor site more voltage faster it goes the same load less voltage the slot goes now with a brushless it's kinda like that but it really came clearly is nothing like that the reason that I want to point this out is because I'm sick of people calling DC motors brushless DC motors DC motors because I think the DC motor that something amounting back brushes carbon brushes on thinking about you know like it classic control not not digital control not alternating like step current control so and I brushless DC motor essentially has the magnets the permanent magnets are actually in the rotor itself so the permanent magnets spin around with the with the with the motor now the thing isn't that though is you then have to have your electromagnets and all your coils around the outside in the state and then you have to selectively turn them on and off by switching them off arm playing a game of chasing essentially the magnetic field think of it like you turn on and off and you drag it around like you would the Sega magnets a lot of small magnet and a compass and you're dragging that in a circular motion around and around and around around an endless loop and a compass needle keeps following the magnet around the outside so you replace that made you Dragon outside the series of electromagnets you can use a microcontroller to switch on each of those in the set sequence and drag the rotor around planning endless gamma chasing so I kinda find it funny that anyone called Des to call a BL DC motor DC motor in this what's DC about exactly as driven by switch mode power supply for goodness sake you know anyway test Brent over about that so that's the motor the rotor arm fixed magnet arm is connected to the wheel turns this data stay status stationary rotor rotor rotating right arm stayed exactly connected to the body of the electric unicycle and doesn't move much while it moves if you fall off a guest in your arm so the gyroscopes that's the next part of the secret sauce so we got a microcontroller you could the motor brushless DC motor you need a gyroscope so gyroscopes typically too horrible to have two one for each side arms are used to detect the angle of the wheel relative to vertical so the funny thing about gyros is that a long time ago though these very very precise machines mechanical devices are operating in a vacuum fixed environments sealed very very expensive very delicate things right in aviation that bit in more recent times they develop ways of doing our chronically basically gyroscopes have become common now of our smart phones so every iPhone since the iPhone 4 is a gyroscope and it is a gyroscope that that that they use in the iPhone is generally the same kind that they use in the unicycles as well and they called a mems gyro which is a horrible abbreviation for something that doesn't need to be abbreviated or maybe does but it's silly micro-electromechanical system so okay whatever only tell me how lot obviously it's electromechanical and obviously it small because it's in an integrated circuit and I know the system is telling us but anyway it's a mems whatever that's is what they call and shrug so a mems gyro and they can pretty accurately detect and provide digital output for a full six axis of rotational movement now the problem is no matter how gyros and how many axes you've got the wheel only moves in one axis with two rotational movements either twisting it forwards or backwards in one axis essentially right yet with one with one wheel you can't become balance left or right you going in order backwards so again corrected by correcting forwards and backwards at it so how does that work when you turn it on and there is no load on it other than its own weight for example the dark gyroscope will detect how far off vertical it is and if it off vertical it will drive the motor very slowly forwards or backwards until it's sitting perfectly upright when you're standing on the pedals and you're standing perfectly upright if you leave forwards it detects that evil that the gyroscope is now off vertical it will then drive this wheel forward in an attempt to try and reach vertical again so if you're not moving the wheel rotation forward will equal the body's rotation backwards and vice versa right so ultimately the control is simple enough in theory but of course it is really not that simple the tricky part is actually more about how you program the feedback control loop so all these EU seas use a closed-loop control that I'm very familiar with because I use it all the time and I have used it for 20 years in control systems engineering is called a PID control which that's a proportional integral derivative control now PID controllers have got a bunch of aspects to them so PID are the name of the the vet of the actual arm tuning parameters they refer to as so proportional is the proportion of change between your setpoint and your process variable the monitored variable whatever it is so as the gap gets wider between what you're trying to achieve and what you're actually achieving the proportional gain multiplies that to increase the impact of the response which is what they call the controlled variable so ultimate integral derivative in a minute arm so the process variable in this particular case is the gyroscopes reading of vertical position our setpoint is vertical call at 0° call 9° readers matters number so pick a point this is called zero so our setpoint is zero we go to much to the positive too much the negative we get an error so our gyroscope reads worse wetware standing out 1° positive so the error would be an error of 1° south again is I know hundred then we will apply 1×100 amount of gain that will give us our control variable output of 100 whatever so in the cow case are controlled variable quite simply is the speed and direction of the wheel so if it's 100 Hz that could equate to hide no one, now Bible 10 forms now whatever works out to basin size the wheel rotation rate probably so the whole idea is arm that the large proportional gain we've got the more sensitive it becomes so a tiny little tilt big jolt forward so the next part of it is the integral component so the integral time seeks to take all of those gain values and spread over time so you don't want to just look at 1° of error instantaneously you want to consider 1° of error spread over a 10 second. Let's say or 1/22. Maybe I do know and what they'll do is it's 1° of error now but that's averaged over 1010 second. So if you sample again and one more second then you've been 1° for two seconds out of 10 so your animal B .2° and then three seconds and to be .3 and eventually had been 1° of error for the full 10 seconds then your integral value will be will be 10 or that's rather how it it it affects the calculation so the longer the value the more the lag and lag you say what I want lag for what you believe me want for the account through you sway and around a little bit as it rolls and correct yes so what does is it what what what integral gives you is gives you protection against oscillation so in all these loops there's three kinds essentially there is critical under damp over damp and critically damped so ultimately we don't want oscillation because will happen is if you have two large again and no integral no derivative than you all slot tilt slightly forward will go superfast over correct and then will go too far back the other direction again and you get an endless cycle that were going forward back forward back for back for back try to correct itself and never get anywhere so you need to have some lag in their but if you have too much lag then you could basically lean forward and before the wheel even bothers to start turning you too much integral delay your falling face such proper not so good yeah bang not so good that the teeth and hair the derivative colour about the collarbones yes it so the derivative is more about our rate of change correction which is great for pseudo-predictive control in a crow close the controller derivative is very rarely used and something that is will leave alone to be perfectly honest so the bottom line is tuning that up getting it right and having different sets of parameters for different conditions that's the trick and the more I write these things and why learn how they've got changed out parameters for different scenarios which get to later so closely PID control and arm to be honest when you lean forward it goes forward if you're already moving backwards it'll slow down if you're leaning if you lean backwards it will go backwards or if you already moving forwards if you lean backwards it will slow you down and that's pretty much in a nutshell the trick to staying upright is the same triggers a bicycle always stay moving and if you not put your foot out because you fall off and that's it so the other thing to consider about how these things function is what they do when they break so when you're slowing down that energy and most of these electric unicycles is regenerated and put back in the batteries with varying levels of success some models doing a lot better job than others in any case arm it helps add to the range right and if you've restricted by airline regulations that's a good thing for your product I suppose so most wheels again over tilt over mechanism such that if the wheel goes off centre by more than 45° tilt of one side to the other side the wheel cut out the safety and I and I don't mean for to back some inside a site because in let's face it if this thing is tilting a 45° you probably fall off arm speed overground for the wheel is easy to calculate because the controller knows how fast it is pulling the magnetic field as a diameter wheel and in the microcontroller so you can figure out how fast it can go and because the dynamics of the motor are understood you can calculate the maximum safe speed because the problem is with with brush DC motor arm is that the talk starts to drop off significantly as you push the speed to the design limit and you need talk in order to correct and hold someone up right is if you don't have enough talk you can't pull them back up again obviously and you then run out of power and the whole thing collapses new face plant so that's bad and for that reason and specifically that reason which is essentially loss of control there is no such thing as coasting so if you're on an electric scooter that is not self balancing you could coast you can coast but if you want a self balancing device you cannot will and in that year there will always be a speed limit always so unfortunately that absolute speed limit cannot be broken it is fixed by the DC motor as fixed by the control circuit and the power the switch mode supply and the design so there is always a design limit and that's all there is to it arm in order to adjust that they had in order to warn you that you're reaching out limit this to mechanisms that they use one is an audible alarm which is exactly what it sounds like BB going fast and the other one is a tilt back which is less obvious and more some more subtle where the pedals literally will tilt backwards slightly and it will you will feel than pushing into the balls of your feet and that warns you that you're going you're reaching the speed limit on the of the year of the device if you just keep going faster it simply can't correct it won't stop you just can't correct in your disfavour? You when it does that little to act as it is it a planning breaking like you would if you tilt the back no owner doesn't know you have to tilt back beyond the tilt back in order to get it to arm slowdown which takes a bit of getting used to the media are established curious about that so I want talk more about my experiences with just a list of some of the brands and names in different different aspects of models that are out there is quite a lot more that there today than there had been in the past so the becoming quite popular so air wheel is the one I mentioned they have a whole range of stuff not just single wheeled unicycles but the model I have is the X3 which is their entry-level model single wheel arm the bigger model has longer range a bigger motor is an ex eight however they also have some interesting to wheel designs there still called electric unicycle but they have two wheels right next to each other their own got a very narrow gap between them they are essentially a hover board without a board separating the wheels if that makes sense because they are thicker overall arm the pedals are slightly further apart there a lot easier to learn how to ride because you don't topple over on them anywhere near as easily there a lot more difficult to to arm to take on corners so the good in a straight line to horrible cornering and locally cornering their almost useless some people like most people hate but they exist anyway so segue imaginable by 9.well which came first the nine bottles segue well technically segue came first nine became second 9.sold better by bot ball segue now liable and segue the same body thing they go and how nine bot thing our rock wheel was another one the IPS are my five is I believe Guam they have a model called the featherweight and the offer featherweight and it is the one that so way 7 1/2 kg top speed of about 25 case now range about 20 km order that is miles arm the two most popular arm enthusiast brands you should call them are one is a company called got way and the other is an account it makes is called King song literally King song all one word arm it is an interesting name but anyhow are at and defining about King song is that all their models have speakers and not joking they have speakers built into them so you can you can basically stream your music from your phone or whatever via Bluetooth and it'll play it and blared out essentially like AER arm while they call those things in the 80s boom box your boomerangs on wheels together have a podcast rear community on demonstrate and everyone else in the world must be forced to listen to it the good news is you can turn it off which is good anyhow so arm the King songs have farm models from 14 inch wheels up to 1618 inch wheels arm the bowler particular that I I'm impressed by is the model 14 D are there is also the model 14 S which is a sport model 14 D is generally considered to be one of the most manoeuvrable and arm lightest manoeuvrable scooters are and why the safest once so are you however if you want speed and performance and like I'm in a lot of speed then got way is pretty much the one they run raise about so got way of had some issues they arm a few years ago is the models were reported as having an oscillation problem which is a tuning problem essentially with the PID dimension before the oscillation arm of going too fast society fast to slow and there certain speeds at which it was present under certain operational conditions so they had a bit of our a few things over minor records and stuff like that negative about reputations people got pretty hurt but the bottom line is that they say they fix these issues now I'm not sure I'd haven't dug into too many details although I have watched several YouTube videos of people with the oscillation face planting I don't know if I should find it amusing or not but anyhow I think most people would find it amusing it's not fair I shouldn't how should find amusing is the sort of thing like it's car crash a car crash and you feel like you shouldn't watch but you end up watching nevertheless anyway so got way have released arm of the got way lovey which is the only 10 inch wheel unicycle aware of arm grossly underpowered and not particularly fast but still very compact models lies you'd think that still are the MCM 14 is not on their models 14 inch wheel I mentioned before there is one called the super 3+ in that particular liners are one of the fastest if not the fastest at 55, is in our top speed arm the got way to Haslar which I rather like the name is not Haslar made by Tesla it's the got way to Haslar and has a don't have a trade mark on the name to Haslar irrespective arm and I think the that has arisen 18 inch wheel I think arm and it's almost as fast as the super 3+ but it's lighter and more manoeuvrable and then of course the one that everyone talks about is the got way monster and is given the name of Stark is as good a 22 inch wheel and the dam thing goes and goes and goes got some crazy like an 80 mile range under any monetary delay set 8808 0 miles wail this thing is insane and the monster is go much bigger thicker wheel it's designed to be used off-road as well as on road so there are lots of videos of people riding the got way monster arm and some of the larger 18 inch sharking songs as well off road so these things can perform off-road and do a reasonable job of it so that said what have I got well I've got the cheapest one I could get pretty much it's the wheel air wheel X3 it's a black model are Mars Rover art has 100 feet to what our battery pack 14 inch wheel maximum locale capacities hundred and 20 kg which is plenty for me because my weight increasing about 90 kg arm and then follow 6 kg worth of clothing messenger bag man back arm because I carried out in writing as well it can only handle an incline of 15° arm and my specific community causes issues on up some steep sections I actually have to walk it up the hill what's that's fine I do want my bike upheld to 1 of my aroma bike to say because I do both right arm it overall it weighs just under 10 kg away is 9.8 kg just £21.6 the maximum speed is 18 km an hour or 11 mph realistically know it isn't it really isn't I've only been out to get 14, is now sustained as 9 miles an hour sustained down but before I do that on the list and the audible arcs your alarm goes off at 12 o'clock is now easier to mile and looking at pictures on Google this one with training wheels you you take the training wheels of gees minibuses are open I put on and they cause me to fall off so I took them off and then it was better arm the tilt back starts in my model at 12 km an hour and hits about 10° when you if you can make it to 16 km an hour before it starts to toss you off you can't disable or change the alert sound all the tilt back on this wheel is not possible so it's permanently on are the low battery cut out at 15% arm and the battery overheating cut out as well what does it tilt the wheel back and doesn't just stop at 10° it is tilt back more and more and more until you fall off plus suffice to say annoying here so this whole thing arm as far as I can tell it's only a 300 W motor arm the longest range of ever had in this thing like the longest ever was about 7 km in a single trip which is enough just arm and that was taking a pretty easy generally cruising at around 10 climbers are now not pushing it very hard if you push it hard you won't get that range it'll keep on doing the whole arm but I'm pretty sure it's an overheating cut out it could be low battery but the diagnostics in this thing there aren't any answers for LED lights and a beeper so doesn't tell you why it just complains and kicks you off now sucks anyway so brand-new this thing would would cost 349 US I bought mine secondhand for about $200 US that's $250 alien not that it was in very good condition when I got it is in significantly less good condition very good condition no I have before and current photos I can tell you that the current photos yeah Silbert scraped around the edges there Vic little cracks in their ideal little draped around the edges with cracks in their unlike me the unicycle does not heal itself a heart my my bruises and cuts have healed at this point but the unicycle does not anyway so bottom line is it is generally considered in the community if in call a community of enthusiasts at the moment to be the cheapest nastiest most difficult to learn sluggish and failure prone model of wheel you can buy so is my kinda wheel and axle year arm dimension before John crazy possibly at this think about our chaser it'll be when you step up and you get on to what they call "rearward year if that ever happens we'll see okay as is a lot more talk about now so I've come of the basics things about the air wheel that annoy me that I haven't already set so the air valve because he will forget this is just a bicycle tube like it's it's like a bicycle sheepskin in a tube as got a Wii and attire on the outside of the wheel rim now this thing is obviously custom-built for this but the air valve easily never after the air valve is really tightly tucked into the inner rim of the wheel itself, not really hinged but it's it basically attacks itself in and it's quite a contortion to connect the tire pump to it to even inflate the dam thing and if you turn that the stem for tennis dam a little bit too far when you try and turn it back after you've done inflating it sometimes it doesn't easily go fully back tucked away again the 1st to hear about is when you ride the wheel afterwards and it starts going to that clip every time it goes past in a full circle clearing on the plastic protective shell that's annoying to common problem with these things are the charging port now the charging port came with a black rubber And it was supposed to stop water getting into the charging port but it – it didn't because it never stayed put it kept just coming off so I bought a cheap screw on one from Ali express and is the most annoying part was I had to disassemble the whole friction wheel in order to put it on because the connector for the power connector is attached from the inside of the wheel the lock nuts on the inside that was fun believe me I was actually surprised when I took apart a few photos I posted some point arm I'd generally I cleaned all the gunk out of it was really actually quite simple inside there the control board and the battery if there's it's not that bad it it's a lot simpler than I thought it would be arm goal and viewpoint leasing is a part of an important safety tip dealers get it yeah when you pull off the battery and the battery socket its terminals are shrouded but the battery plug on the staying was not shrouded the pens were exposed pens through anything well this not the battery that's okay right well make sure you take those up and insulated those connectors when you disconnect the battery because while the Jesuit maybe it was acid and was there is a mass of some fireworks well okay so that when I was changing that aforementioned charging port I accidentally touched accidentally the exposed conductive parliament with their of the pliers with those two terminals and the capacitors which not surprisingly quite significant are discharged with an extremely loud bang now he was made worse by the fact that my head was right down next to it of literally like an inch away from it because I was trying to get in close to see what I was doing with the pliers my ears were ringing like for a few hours after that and make more than my usual tonight is ringing anyway arm but there was no permanent damage to me or my hearing that hasn't already been damaged to my teenage years and other than some adrenaline which dissipate eventually anyhow yes safety tip if you do pull apart the KE writing the air wheel dearly no yes duly noted so Romeo will store about learning 1st to the first day I got this I went to a really really stupid and I mean stupid I actually am not sugarcoating that at all I didn't wear any safety gear just shorts sneakers and boy did I get hurt by I had a nasty graze on the inside knuckle of my right ankle so you know that that knuckle inside your ankle that's that bit of skin there was great that raw multiple layers of skin down quite a reasonable amount of blood and because it is always covered by sock arm year that took a long time to heal and that was caused by getting on and off and was on my right foot because right-handed right for dominance so I kept year as I keep getting form of the will get back on again I do is basically robbed raw Garnishes stopped holding the wheel steady you put a lot of pressure on your inner shins because you're your inner shins hug the sides of the we'll try and hold it up and hold itself up and you get a hell of a lot of bruising until you get used to it to you condition your shins so that wasn't pleasant I had cuts up the back of my calves and what happened was that the wheel has aluminium pedals or alumina petals we like and when you fall off the pedals if you go forward ahead of the wheel the wheel runs into you from behind and then the pedals basically cut big gashes in the back of your calves stretch out ouch I have photos of all of this which I may or may not ever published but never mind point is it happened it hurt me still it took me about four days practising an hour a day or maybe two are before I was able to write confidently in the driveway arm without falling off and I could turn left can turn) and left that was good it's good to us this could get little bit of time set achievable goals took me another few days to get turning right down as well is going up and down galas and bumps that took a little bit longer now the funny thing is that I didn't I couldn't ride on the road there is no footpath where I live so this is my driveway which admittedly is a long driveway but is a bit of a slow bite is nowhere flat to write it so I never really got too fast and I certainly wasn't riding riding on level ground and it may sound strange wow you fell off riding on level ground yet because you lose the sensation of speed so the first week I wrote it to work I fell off a lot because I still had to get used to riding on that flat surface is kept going over speed I didn't hear the audible alert is fell off because when you're in a city it's really noisy and outer bike paths have quite sections because they don't away from traffic but others say to the bypass go right alongside the train line for a reasonable distance and when the train gone past on the other side offence you can't hear much other than scripting steel on steel while ranting euro area pods into rate listening to them not look nominal zoning I didn't risk it when I was learning I could not where the airports I couldn't so I didn't because it was too dangerous I needed to listen to that alert and I learnt and I learned quickly that I couldn't because there were sections of the path is couldn't hear it I would you show outdoor blood in the collective stroll through battlefield to get there arm honest answer yes I actually commandeered a journey where I don't arm no because they didn't know why got them but they do one person did asking once so all right arm when I was your knowledge on you is something going on here I think I was so caught up with the whole you know with them for those listening to what happened to me in the last few months arm without the headcount reduction in males are a thing to of self absorbed that point to care but was happy to John the palms of John's hands being covered in gravel rash every third morning never mind that arm right where was I okay so after a couple weeks though riding on on little services I really studied the hang of the tilt back and feeling that tilt back when it was happening so I didn't have to rely on the audible alarm and I could start wearing airports listening to music in the and you taking phone calls I had to and I started to learn some of the PID loop control peculiarities of my specific air wheel and I suspect they're all different but I'm learning mind is the interesting things I've learned about mine which is something that you don't think about until you've tried writing listings so when you change slope from a flat surface to a sustained incline does not be much as a sustained incline of a couple degrees or takes it can take a couple of seconds but then you will feel the attitude of the pedals tilt and not tilt forward to bring you close the vertical which makes sense but that couple of seconds is a problem because if you overcompensate before it does that annually into fast forward during that transition then you can end up leaning too far forward annual does fall off your fall forward get so when you change inclines I've learnt you tend to select ease back slightly see don't go as fast you wait for the pedal angle to adjust and then you can lean back into it again is fine I've also learnt steering when you're breaking down hill is by heart by far the hardest thing to do because when you're leaning back it's try to break if you try and steer when you're breaking it is exceptionally hard to balance their found yet so I found that if you really want to break you break straight and then you turn at a lower speed is a lot safer there the other thing I've learned is going over bumps down hill you really need to bend your legs to absorb the shock of doing that otherwise it will do is kick you off because when you're breaking there is no failure is right and it has more trouble keeping its balance when you're breaking and you go over and bump it really struggles so I find that if you bend your legs because if you keep rigid legs which is finally going straight up help if you bend your legs which is more difficult because of you bend your legs then you have to have very good side to side balance because as you bend your legs your knees naturally start to come apart so you lose that grip on the centre of the air wheel so it tends to tip slightly if not perfectly balanced so it's it's it's more difficult to achieve than you might think so the first few weeks I was writing it down hills with bumps on them arm I am I nearly fell off of multiple times because I'll try to dinner with rigid legs that has gone that of my balance has been less of an issue okay so how does it look and by that I mean what other people think I know what they think I can imagine what they think that are the way they look at you in here is what I've had sometimes people will look at you does say nothing and others shake their head and dip their eyes and says it all sometimes I'll chuckle smile occasionally you get something verbal and occasionally it it's actually occasionally it's good are I've had wow look at that futuristic thing that I had someone say hey week I get one of those he tried to maintain a conversation with me as I was scooting pastored didn't go well louse I was I was out of earshot he was out of earshot by the time I told them how much I paid for it how much is that thing worth I've had that question and quite a few times generally from schoolkids like you know middle school high school kids say hey that's a segue or variance of that occasionally you get bad comments so I've had one guy once is actually quite a while ago bike paths of the bikes are soul really really just one guy once arm I've had a couple of lookout please or will you look out thanks and a couple of watch it anything it's interesting everywhere and anybody over the model just checking loop I'm more of a danger to myself I am anyone else believe me so on this thing a cyclist like that I referred you might prove a referee in my previous comments right 50 K is an hour I've seen bikes screaming past at stupid last speeds they could put someone in hospital and of their older person all the pedestrian naked Kelham me right listening man I'm more likely to kill myself than anyone else because this thing can't even go that fast so you know it's just anyway but he's the other one that was interesting I got this a few weeks ago this guy approached me was waiting to cross the road on standing on the unicycle and he says a sales pitch is like he has a flyer in his hand and he says if you want stop writing a kids toy and by real machine take a look at these electric scooters and these are like you know like like a scooter style lacquer sitdown grout scooter single like in a freeway speed sort of thing but it's electric the way he said it though you want stop running a kids toy critic other family you think yeah and the reason I mentioned and made point of Sharm Mr Chan's point earlier that he saw the hover trouble board as a toy that was why mention that is that the inventor of these things sees them as a toy is this guy comes and says rather condescendingly hey his toy you and your toy when a real machine and is looking at than first negation my head is if I was a man who is interested in manly masculine staff I wouldn't buy electric scooter I'd buy African Harley Davidson right because that's just what you know I do know isn't I don't actually know I suppose so or sport bike you know I would buy African electric war while I do that but seeing as how I don't give a crap what other people think generally speaking I will simply ride my electric unicycle call toy if you like in my comment to him was simply if that was your sales pitch insulting people you try to get to by your staff you not gonna get much of a commission are you there thanks to Chloe and the Excel deck I mean seriously and I didn't call and that I thought that irrespective they go just once so you do get some unusual stuff now you're writing above my bicycle even if the folding bicycle and responsible sporty fast $2000 fancy boron frame made out of aircraft aluminium minor whatever you know that's common as mustard by that it's out there it there everywhere not bat an eyelid but this has novelty value so you people can look so if you don't mind that and I've gotten very good at steering past people because you kinda have to do because every second person looks at you so appear pressure doesn't get me in the end arm will see I guess anyhow I'm determined to try and keep this up for a bit longer and see how long I can do this it only paid for itself and how much it saved me in terms of their arm now parking costs and me not dying from trying to ride a bike in everybody day anyway never mind that so arm what else are so the X $imagine before the top speed I can really only do is about 12 K is now 8 miles an hour arm which is not that really that fast a fit jogger can keep up with you in fact estimate and underscore the point one guy even overtook me in a very brief strength to get ahead of-Hayman is fine just you just run then by her anyway pretty much every cyclist overtakes your listing every single one on the flats downhill sections especially but not always on uphill sections so that's the only gratifying part but in a given that there are as many uphill sections for the most most the time you write listing you getting overtaken it is get used to it because it just doesn't go that fast anyway on steep inclines I have to say arm I've got a bit better arm at weaving the wheel so like you kind of weave the wheel left and right in very tight turns at slower speeds when you going up a steep incline it's more than 15° even though you're barely moving to sort electric the inclinometer into letting you go up the hill without cutting out our sightreading is not really tricking its physics roaming you zigzag up steep sections you'd like the colour road zigzagging uphill right seeking get up with less talk it's not a new idea by got better at doing that using the wheel which is kind of nice there anyway and as I've said before the problem with going downhill you can't coast so that limits your top speed no matter how fast you go you're an absolute rotational speed you can't going faster so with a bicycle in coast downhill then issue you can't do that on a self balancing device you just can't so what happens is on a bike evenly going slow up the hills even if I zigzag up the hill super slow or walk up the hills whatever on longer make up that time gone down the hill is likely outcome bicycle I can I can freewheel down on a downhill account on this thing so the commute takes longer there's no question and is not just the top speed so I have also pushed hard sometimes and get that BBB pinna tilts back indefinitely I can how that if it's on the flat I can handle it from going uphill but I cannot handle it if I'm going downhill because it's tilting me back when I'm already tilting back try to slow down and one slowdown and it is falloff is really bad specimens in front of people and their year but in most cases it is generally overheating or as I current draw leading to a low battery like a salad in which if that happens let us jump off a turn off the air wheel and I carried for about two minutes and then a hop back on were good fun and we could again for another kilometre or so subtly in the world but it is as I said in front of people's embarrassing moment arm I'm just putting this whole poor little wheel to its limit on beyond its limit and that's probably mean of me but hey it was cheap whatever the safety are now taught that is a lot the last episode but just a quick recap I think you should always wear a helmet when you're writing only things even if it is not required to by law it is here but even if it isn't too anyway long pants save my legs plenty of times except the first day was too dumb to wear it I will always wear them always and I still regret not wearing them on day one that might to protect against falling forwards if you're going to go faster than you can comfortably run and I mean like if you fall forwards you can hit the ground running and have very very rarely face plan the ground and if I have always been out to get my hands up in front of me I've had a couple of grazed palms my wrist that's it there was the worst of my injuries very minor bruising so if you worry about that is where some gloves singles gloves in a like bike bike riding gloves truly fine that's all you really need and if you really want you can get a plastic rib arm embedded in some of those wrist guards forbid extra protection if you really want to if you really worried about that now you're going faster than 30 5K is now 22 miles now something about knee pads elbow pads longsleeved shirt don't muck about and if you really gonna go really really stupid fast a beginning soup of the three ergot waiters or something like that stupid fast firstly I still think you crazy second of all get a full face helmet for goodness sake because of those of the speed if you come up your arms will not get up in time to protect your face and you'll be getting reconstructive surgery at your local hospital you will need pleasant and wearing a full face helmet will be a lot more pleasant than having your face scraped off the pavement never mind that I've heard a lot of people say how dangerous these things are like I actually put the sound to it has even else ever actually written monies things I got crickets I did get a couple of jokes something along the lines of arm know those people won't respond to you because they're already dead or worse to that effect and hence survival rate of arm unicycle writers is rather low was no evidence to suggest that is of course true the truth is I don't naturally think that these are very much more dangerous than a bicycle if you come off a 50 K is now in a bicycle and your higher off the ground as well you can break something in a pretty much most the same reasons Apec colour wrong maybe even a collarbone indeed yes so the key I think is if you get a faster wheel is like any other vehicle just because it can go fast doesn't mean that you should go fast speed limits for a reason use common sense drive to the conditions pay attention don't take stupid risks right I shall see how fast my car can go over look you can do hundred and 80 km an hour hundred and 30 miles an hour oh I've lost control oh I'm dead so those sorts of things happen in a logical progression of stupidity so if you can avoid the stupid then you will not be injured I really think it's a lot like that so the ideal arm EU see for me it needs that are built in handle further trolling around that sounds a bit weird maybe but the problem is that these things are heavy and yes at 10 kg I can chuck minor backpack 7 pounds I can carry the backpack I can also hook carried by hand I can put in like in a the gym style bag I can carry but I can only character about five or 10 minutes before it starts to get a bit young much fun carrying it by hand if I got a backpack I could probably do it for an hour but it's can get pretty tiring so one solution that was thought of a few years ago was you put a handle on these things it's telescoping so you push a button like telescoping handle and a wheeled suitcase and up pops a telescoping handle and you just literally wheel this thing around like it's a bag with wheels and suitcase wheels and you live thing powered on so it stays upright we could do a stop from tipping toppling over and it's fine so I'm actually a try one of those out has arrived in the mail yet arm but the problem is that because my wheel wasn't designed to have one it's a retrofit kit problem with that is that it doesn't tuck safely inside the wheel so if you do falloff for whatever reason legitimately or not embarrassingly or not your poor little handle is gonna get potentially damaged when it when the wheel tumbles so are built in handle that disappears down into the frame is a common feature on most of the third generation of these things so most models of got making song 14 Scott are all looking songs are gone actually are the emotions of Gollum got ways of Gollum's pretty standard now so I deftly want one of those arm I would very much like a wheel that has a built-in front and rear light is an intense front light you can actually use to see your way and a flashing red light for the back for nighttime and preferably lights that auto switch based on the direction of movement and it may sound silly but there's already wheels out there that do that so of the wheels moving forwards the line the front changes from red to white if it's going backwards changes from white to red just can't handle spherical some of even even more expensive got ways of even got a series of LEDs that that look at your angle of tilt in the left right direction and automatically indicate which direction you're moving as indicators for charity signal you which dancing automatic basin the gyros is vehicle okay I recommend other programmable tilt back speed and programmable alarms including the ability to disable them they may think I'm crazy but honestly audible alarms are so stupid they're great when you're learning but once you're done to get it I would rather tilt back at this point and I'd like to be a programmer tilt back to whatever speed I wanted to suffer one set 20 December 20 that is at whatever speed I think is safe for the conditions right and there are plenty of them to do that most the got ways that you do at the King songs let you do it with the right firmware tweaks but mine doesn't anyway so my ideal one would also be lightweight less than 8 kg and right now the market there are very few this like to that are less than 8 kg and I have neither arm I like when I had enough range that I don't have to recharge it at each end debt at each destination so at the moment only have enough range for a site to charge it at home when I get home after charge it when I get to work so a charger both ends of the commuter rail have one a charge one that sister so matter of a bigger battery pack so that is easily solved plenty of that he can do that a higher top speed but I want one that can be programmatically limited I doubled the fastest one out there 3030 5K is now 2025 Miles an hour that's fast enough that more than fast enough and I even think that spotting a scarecrow about Mesa propping up I deftly want one that can handle a higher gradient than 15° seriously anyway 30° incline to be nice and finally Bluetooth for connectivity and that's actually becoming standard on most unicycles you can download an app on android or iOS and it lets you configure all of the settings that I just talked about as well as get diagnostic information from the yard critical yet and ephemera dates and everything fits kids get their getting quite advanced okay so finally you may be asking why the hell am I doing this may be maybe you been listening long along long enough and have garnered why I'm doing this from the last episode but to spell it out in case it's not clear so mid last year I was faced with a pay cut a significant pay cut arm and I was looking for ways of cutting community costs which is one of the reasons for why will this wife all the soul-searching and different things and trying for a while I was taking the train them as the timetables up they put the fares up so is Ashley faster and cheaper for me to drive my car it wasn't cheap at a park so I paid extra for that while I could but you know that only lasted six months so I took a pay cut and I had to give away I used to work in a suburban inner-city we could Street Park but it was in a sports stadium parking zone so if there was a game on or an event on the stadium I was screwed totally screwed arm I couldn't part Macaulay's on those days I'd have to pay for parking or take the train or walk for about an hour which was gonna happen so it was at that point I decided it was time to try something different arm to park in a spot where there was no confusion about whether or not you come back and find a car had a ticket or been towed or had a boot on arm that consistently depart every day there were no issues there are always planning a parking is now to be there at six in the morning to get a car park arm and in order to do that I had a park outside the central business area so I then invested in a folding bike and I started riding my bike in on the last leg of the trip and unfortunately there is a waiting list for the industry facilities and I was very sweaty and people did was next to me and that's fair enough the propeller is that I was in XP but they always assumed it was PO when a minor is fine just getting taught of partly killing anyhow so bottom line is arm I decided to try something I didn't sweat as much and I decide to invest in air wheel to give it a go I been writing the wheel at time of recording a bounce for weeks now five weeks something like that and that's an ill be a bit longer than that when this finally goes to air but the bottom line is that it's arm goes where what what a funny terminology to be applied to a poor cast but here goes digital goes down into webs anyway the whole point is that either the folding bike all this although air wheel I travel along the northern bike way and then commutes along that section actually bypasses the most heavily congested bit of traffic on my whole commute to the finding is it doesn't take me that much longer in fact to do the commute because I can ride straight to the door and go straight in the building the only difference is the bike I have more time changing from one form to the next at which point then you know it's it it works out very close so on average the air wheel takes about 10 minutes longer to the old building that when our changing buildings the new building it's only five minutes longer than riding a bike obviously and that's including into an changing industry facilities and changing clothes and all that Robert all factored in so the reality though is that it's no good for fitness so I still intend to show a chat to change it up and do a bit of both a song still thinking about faster wheel but that will be an end badly I thought I suspect it may so I do know and I got it and am thinking to be perfectly blunt I'm thinking about whatever you and I'm not I'm not teenager any more far far from it there is grey in my beard man and it's like I have a beard which when I came offered 100 times and I shall come about progress 67 occasion out that point why she came off down the mountain years ago arm there a year is like I I barely had a beard so I'm in I am not as robust as I once was and I have to get my head around that is my Grammys assay the world still looks the same but the bottom line is that my body just anger bounce back anymore and arose giant we break you and you know what they safely break a habit RH to sell this year but then again I also think about riding the bike and if I fell off a bike I'm in just as much trouble I was really worried about being safe I'd stump up the parking drive all the way in but I can't afford that either Ada and another that be too terribly worried about the bakery what happened to me is a pretty fluke accident eight AA could begin to estimate how much time and how many males are spent on bikes over the last couple years but is really pretty rare that was the worst bike rack that or any bike rack that I have had for a back as I can remember I think Lester may remember a significant by Greco was either in my teenage years are really early 20s and insisted that if you care for the hayride and where you rate it doesn't happen too often new triglycerides are significantly increased in the unicycle I don't necessarily think that's true nothing of some of stated a lot of my reasons why arm in the last term the last episode and and to some extent this one I actually think that if I were to get a faster unicycle arm it would have carry a very similar risk may be slightly higher but not much arm as riding a bicycle at those sorts of speeds arm I think I was really worried about personal safety I like I said I stand by my statement I would be driving a car in arm if that's my greatest concern enough that that the one area that is you know you have to take pause and think about is fitness and the truth is that in a if you do when I was walking from the train to the building there was a good 1520 minute walk every day each way in addition to the train so I would write to the train station take the training and then walk the last leg arm and I got my I close my half-hour excellent exercise ring every single day and and I was good but the truth is that riding a bike it is more intense it's about the same kind of amount of exercise is that they be slightly more but if I'm writing the electric unicycle in the last leg I am not gonna get anywhere near that amount of exercise and and although it may build some now while he is the problem is that you can't as the pasta Wiley if you are look at brutally and say riding electric unicycle or any other let motorised device is going to lead me down the road of gaining too much weight if I weigh 115 kg that plus my luggage I'm carrying there are no electric unicycle is a could carry me at that point there so the problem would then resolve it's a sure side hacked anyway fair and on that note if you'd like to talk more about this you can reach me on mastodon at GG at or you can follow engineered_net on to the seat show related announcements if you like to get in touch with the best way Beckett one fantastic riding well special thank you to our patrons big thank you to everyone listening and not laughing my old age is in writing and aerial and is always love me and we'll if it does look like a lot of the I don't often admire if if I had taken a disposable income a property and a plate to have one of the toy to play with you said that you would mean I don't mean it like that the unit I would use it as a serious commuting device C that all okay then fine someone while the other I'm crazy using as it is a commuting device or whatever not allow like if they stairway the statement it does look like a lot of flight�
Duration 1 hour, 37 minutes and 2 seconds Direct Download
Episode Sponsor:
Makers4Good: Makers4Good are an innovative company based in Palo Alto, California and they’ve recently released the HELIO: A Solar Light, Torch and Powerbank that’s perfect for camping, hiking, emergencies, gazebos, use as a night light or wherever your adventures might happen to take you. All profits from the sale of the HELIO go to providing light and power for those in need. Visit and use the Coupon Code ENGINEERED for 20% off the total price of your order.

Show Notes

Miscellaneous Links:

Episode Gold Producer: 'r'.
Episode Silver Producers: Carsten Hansen and John Whitlow.
Premium supporters have access to ad-free, early released episodes with a full back-catalogues of previous episodes


Vic Hudson

Vic Hudson

Vic is the host of the App Story Podcast and is the developer behind Money Pilot for iOS.

John Chidgey

John Chidgey

John is an Electrical, Instrumentation and Control Systems Engineer, software developer, podcaster, vocal actor and runs TechDistortion and the Engineered Network. John is a Chartered Professional Engineer in both Electrical Engineering and Information, Telecommunications and Electronics Engineering (ITEE) and a semi-regular conference speaker.

John has produced and appeared on many podcasts including Pragmatic and Causality and is available for hire for Vocal Acting or advertising. He has experience and interest in HMI Design, Alarm Management, Cyber-security and Root Cause Analysis.

You can find him on the Fediverse and on Twitter.