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EUC

Found 4 results

  1. Lot of us had face plants in this forum. New and experienced. Some of them got seriously injured. I'm wondering if all of them recovered well and riding again. Generally we get posts soon after the unfortunate incidents but after that we don't hear from them again. I'm just curious to know if they still love EUCs.
  2. EDIT 12/2018 There were humorous certificates embedded with these posts but the links have timed out over time. Sorry. I think it's high time we "Planters of the Face" be recognised for our achievements, and contributions to the merriment of our fellow EUCers by sharing, in excruciating detail, our pain and injury, in the futile hope that they might not follow in our face foot steps. towards that end I have created this FACE PLANT WALL OF INFAMY. If you believe you deserve a certificate for you contributions to face plantism, pop me a private message, simply stating the approximate date, (month, DD, YY) and I'll create a certificate for you, and carefully hang it on the "wall" for all to laugh at admire, just like mine EDIT. Classes added. 1st. Class for actual face contact. 2nd. Class for no face contact. 3rd. Class for full face helmet contact. tell me what class you achieved, and also your approximate speed.
  3. I came off the other day ( yeah, what's new, right?!) but it got me thinking. Here's what I wrote in another post: the other day I was about to cross from one smooth surface to another, on the same level. No biggie right? Wrong. You see there were women ( why did it have to be women?) walking on the other smooth surface, so I had to cross further down, behind them near where these parallel surfaces ended, and not in my usual spot, somewhere nearer the middle. at about 15kmh, what I didn't notice was that these two level surfaces WERN'T level near the ends, only around the middle. Well you can all write the next bit yourselves, can't you! At 15kmh the wheel hit a 4cm edge and stopped long enough for me to start my low level flight. I did manage to run it off, despite being old and out of shape. The women, who had just passed through, were not impressed, but I got no sympathy either, boo hoo. ? Maybe I should have hit the dirt hard, instead. At lower speeds I might have made that unseen edge with a huge wobble and a lot of flapping, but at 15kmh I was a runner before I even knew it ??... End quote here's Lassies standing over the true, level surfaces in an area I have crossed several times before: now, here's Lassie at the not so level part: notice leash 3.0, and in the background is the beach where I found it. i was crossing from blue to grey at about a 45deg. angle more or less in line with this photo. this is where I ran off my dismount: See that sandy patch, with the tree and boulders? That's where I finally stopped. if that had been a cliff, or a wall, or a parked car, or a mother pushing a stroller with babies in it, if, if, if... we often ride in a straight line, down a sidewalk or a bike lane, etc, so the next 2 seconds of our journey is like the last two seconds..I.e. Straight in front, no drama. But if we weave, or slalom, or are changing direction; even on an arrow straight path, the next two seconds changes every, eh.. two seconds, or so. So now, if we come off, (and coming off is ALWAYS an option) where will our momentum take us? Out into a busy street?over a cliff?into a wall? Into a tree and or boulders? in this example, I was lucky; my run off path was mostly clear. But if that tree or the Boulders were 1m this way, I would have had a vertical face plant, or banged up wrists or both, like the bike rider with a front wheel for a nose ( see recent post) when I was learning to fly ( real aircraft) and when I flew paramotors, being aware of the terrain, and knowing where to do an emergency landing (at any given moment) was part of the drill; and staying out of situations that afforded no safe "out" too. I suggest, that we adopt (if you have not, already) this, "where will (my face) land if I come off right now" mentality. I'm not saying to wheel in fear, just to build it into your routine, behind the scenes, thought process.
  4. Now it's personal. This is the master list of micro unicycle brands, categorized by safe electrical behavior. This is the thread to read if you want to buy a uni that "doesn't actively try to kill you" (@esaj). Problem One: BMS shutdown Most popular low-priced generic style brands, and many other popular brands of the last generation, are made with an electric bicycle style battery management system (BMS). This part can try to protect the battery and shut down instead of protecting the rider, even in the best conditions. This means, the unit stops working unexpectedly. This WILL happen one day if you have a uni with this design, because as the battery ages the likelihood of this phenomenon occurring increases. It is possible to modify the badly designed BMS using the "shunt mod." To be absolutely clear, a modified BMS is not the same as having a unicycle that was designed correctly from the start. Examples include Airwheel, Firewheel, TG, Rockwheel, early Gotway designs, many other brand names, and most generic imported models. Even Ninebot has a battery management system with unknown variations. Problem Two: Main board shutdown As the battery gets lower, the voltage decreases. With lower voltage, a higher current is needed to produce the same power to the motor as with higher voltage. This causes heat, and if it gets too hot, the unicycle will shut down. This problem is solved in units with safe low-battery behavior, for example Ninebot has a slow operation on low battery. Speed can also cause main board shutdown. Most brands tilt back and beep to tell you to stop going faster, and some talk to you. Some unicycles will just go faster and faster until they turn off because the motor can't take it anymore. Gotway, Firewheel, and Rockwheel are examples that will experience a speed-cliff type mainboard shutdown ie designed to kill. The goal: An electric unicycle must NEVER, EVER, EVER turn itself off unexpectedly. Ever. This phenomenon must be designed out of the equation. Manufacturer established solutions: Solution one (BMS Shutdown): Better BMS design. The battery management system has no way to conduct shutdown. Low battery tiltback / slow down. When the battery is low, instead of allowing normal riding, the unit slows down or tilts back to make it difficult to ride. Solution two (Mainboard Shutdown): Better main board behavior. Locking low battery - The unicycle should warn the rider of a low battery extra early, and slow to a stop entirely when riding is unsafe. The uni will be non-functional while still partially charged, and will not be ridable until it is charged again. This is called locking low battery behavior, and both Ninebot and King Song have behaviors close enough to this to solve the problem. High Speed tiltback - Almost every brand of unicycle avoids high speed shutdown by tilting back at high speed, so that the user can't push the uni past its limit. Every brand except Gotway, Firewheel, and Rockwheel and a few others are safe in this way. The high-speed warnings, however, must be obvious enough to truly protect the rider from pushing too hard. Solution three (batteries being sold are too small) This is on you! Buy the biggest battery you can afford. If you're going high speed, don't settle for 340wh or less. Look for something 600wh or above. And leave some wiggle room at the end of your battery no matter what; don't use the full range. Incomplete list of brands Very Dangerous: TG / OEM models of the same design - All models have both problems. F-wheel - BMS shutdown, maybe mainboard too. Suggested "buy to find out quality." SML / OEM models of the same design - All models have both problems. Airwheel - All models have both problems. Firewheel - All models have both problems. Firstwheel - All models have both problems. Rockwheel - All models have both problems. Fosjoas - All models have both problems. Suoku - All models have both problems. Huanxi - BMS is unconfirmed as safe, but has safe low battery behavior. Less Dangerous: Gotway - Older versions have both problems. Newer versions just have problem 2. Inmotion - Could be safe. Awaiting answers from manufacturer. IPS - Problem #2 has been documented in the forums. Safest: King Song - All of the problems documented here are addressed in all known models. The safest brand available right now. Please submit arguments! Ninebot (early models may have bad BMS). Despite their size, it is difficult to get answers from them about this issue. The only brand that is documented to shut down due to overcharge going downhill. This occurs on full battery because of regenerative braking. Can people submit comments about other brands that do this? Solowheel - Probably safe; need more detail. Obviously this list is nowhere near complete. Any input or criticism of the thinking presented here is more than welcome! No one here can do this alone. As the trend setters, we need to to make sure that new people getting started with this technology, and in particular innocent bystanders, will all be as safe as possible. Conclusion: There are solutions to all of these problems, but most manufacturers aren't implementing them. If we don't solve this problem, electric unicycles WILL hurt people, not only riders but bystanders as well. ALL electric unicycles will eventually become demonized in the public image, and will likely be made illegal or heavily regulated in many locales. Thus, any trade off is not only worth it, but entirely necessary. Any manufacturers who won't comply with these safety requirements need to be publicly exposed and driven out of the market. We need to protect new riders from manufacturers who don't care about their safety. So, anyone know other brands with confirmed electrical characteristics that are definitely safe / unsafe with regards to unexpected shutdowns?
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