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Found 7 results

  1. Hey all, I'm trying to determine if this is an issue with the latest firmware update, a problem with the control board, or another issue entirely. Most recently I have noticed that my Z10's center of balance is making more drastic changes at low speeds. When I start the unit up and begin making small movements, I can feel the sensor reset slightly and at times have had the footplate tilt back and forward a significant amount before slowly resetting. This isn't as extreme as the issue linked in the post below, but is significantly different than when I got the unit. Again it hasn't affected me too much at higher speeds. Is it possible for the control board to slowly wear out?
  2. Hey, I have inmotion v8 more than a year now, drove around ~1000 km. Face planted only once (after 3 months of usage) when I reaches "I'm-too-cool-to-look-at-road" mastery level, hit the pothole in the road, the only real damage was torn clothes as I was with helmet, wrist guards and bikers jacket. Today I was driving my usual route on a kind of dry day (10C), battery ~90% full and driver blocked my path with the car on pedestrian walk, I had like ~15 meters to stop from ~25-27ish km/h speed. No bigy, done that before, just lean back, look awesome, reduce speed to put one foot down and turn 90o. v8 started wobble front/back like ABS (anti-braking system) in cars do, like never before, this intermittent braking shook my feet of the EUC and we were both sliding under the car. Ti's was only a mere scratch - to me, EUC, my self-respect. Shook of the dust, hopped on EUC and continued down my usual route. Two kilometers later, was doing pathetic sub ~20 km/s and started gently braking before ~80o angle turn. That son of a b*tch shook me of in same (tilting quickly front/back/front/back) way as few minutes back, EUC ended up driving in car road, got under the car, broke bunch of EUC plastic covers, left me sitting on my ass. Anyone had this behavior with v8? P.S. I changed to summer tire few weeks back, not sure if related.
  3. Hi folks, I was annoyed by running into over-voltage trouble everytime I start with a fully charged battery and have to run downhill. For some time now I used a modified charger with reduced end-voltage, but I wanted to solve the problem by its root. Together with electronics developer friends we created a circuitry that activites a load resistor, whenever a certain voltage level (67.3V) is exceeded. Such a circuitry is called break chopper. It helps breaking any kind of motor/generator drive. I installed high power LEDs (2*100W) into my KS16 as the load resistor and I am fairly satisfied with the function. I also made experiments with halogen lamps as the load resistor, what I show in the video too. Such lamps radiate away the largest part of the braking energy so it has not be spread by heat sinks. Besides the LEDs, in the second part of the first video I use 3*150W /24V halogen lamps as the load, but these seem a little oversized. In the second video I do the same track (140m descent) with 3*75W /24V lamps, what works as well as the 200W LED-load. I hope you enjoy the nerdy experiments and light show!
  4. I keep hearing people talk about how some of these wheels will regenerate the battery when the unit is braking or going downhill. Does the GotWay MSuper V3s+ do this?
  5. hey riders, today I had the chance to ride a MSuper v2 It felt really great on forest paths, if you roll in one direction it will hold that direction like a tank no matter what. I did not imagine the difference between 16" and 18" wheel size would be that big, on the other hand it wasn't nearly as agile as my KS16. However one thing annoyed me to no end, it felt like forever to come to a standstill from going full speed. The MSuper v2 braking performance is abysmal imho, esp compared to V5F (good) and KS16 (acceptable). The guy told me his wheel is the 'medium speed' edition, however cutoff when lifting was at 52kph !? at least according to the Gotway Android App. Now that I really enjoyed going offroad with a big sized wheel it is needed I'd like to question the community about which big size wheel has the best braking performance? Gotway MSuper v3 (62/84V), Monster or maybe KS18? Any first hand experience and advice is much welcome!
  6. Good news... seems our Danish government's biggest concern is our ability to brake on Unicycle and not fall off... We have been asked by the politicians to make documentation that breaking is safe... Anyone aware of footage that will help us prove this until we have our own video made..
  7. I had an interesting experience yesterday and I'm hoping someone can help me make sense of it. My IPS 121+ went out with me for my first serious uphill ride and I collected some numbers I can't quite explain. My wheel has a nominal 350 Wh (Watt hour) energy capacity. I'm a pretty big guy (~100kg) and I went up a 75 meter (vertical) hill at a pretty slow pace, maybe around 6-8 km/h, total road distance about 1.5 km; parts of the hill are pretty steep. Initial battery state as reported by the IPS app was around 70%. By the time I got to the top of the hill, the app was reporting 35%. Assuming that the percentage reported by the app refers to the energy left in the battery and not something else, my wheel used about 35% of 350 Wh = 122 Wh of energy bringing me up the hill. The actual physical (gravitational potential) energy of moving 115 kg (me + wheel) up 75m is ~85 kilojoules, or about 24 Wh. Going up a pretty steep incline, with really strong power draws from the batteries, plus all the balancing and everything else using energy on the wheel, it seemed reasonable to see a 20% efficiency. To recap: 24 Wh: minimum energy required to move me up the hill. 35%: battery capacity change 122 Wh: 35% of 350 Wh, the nominal battery capacity, the estimated actual energy used to move me up the hill. 20% energy efficiency: seems low, but what do I know? Then what happened next surprised me. I rode my wheel back down the hill, expecting to get back some amount of the lost energy through regenerative braking. From somewhere I got a 50% efficiency number on regenerative braking, so I expected to get back a little bit of energy. And indeed at the bottom of the hill, my battery was back up to 52% charge. So I got back 17% of my battery, which makes sense -- I used 35% going up, and got back 17% -- about half -- going down. Except that would imply that my battery accumulated 60 Wh or energy going down a hill that only has 24 Wh of potential energy. Either IPS has managed a 250% efficiency in regenerative braking (someone call the Nobel committee!), or my math or physics is wrong. To recap: 24 Wh: maximum possible energy gained by rolling downhill 17%: battery capacity change (a gain this time) 60 Wh: 17% of 350 Wh, the estimated actual energy recovered by going downhill. 250% energy efficiency: huh? Anyone have any insight? Are the battery ratings optimistic? Is the charge meter in the app wrong or non-linear or something else? Perhaps the actual nature of battery chemistry means my battery underreported charge after a big power draw? If I assume that my wheel does recover 50% of downhill energy, and thus 24Wh / 2 = 12 Wh represents 17% of my battery, then its true (usable?) energy capacity would be only 70 Wh, a far cry from 350 Wh. (If this is common among EUs, someone must have noticed by now, right?) Thoughts? Explanations? Ideas? Errors?
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