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Found 7 results

  1. I've been absent from the board for almost two months ( been busy settling back into life in England), but I have been riding. I managed without a car for a month, relying on my wheel to travel. After that I needed to travel further, and public transport in England takes forever to get anywhere, and it's hellaciously expensive. Example Poole to London about 120 miles, £51. I have flown to Spain and back for less!!! anyway, I found myself in Bournmouth yesterday, and because I had my wheel with me,I went for a cruise along the magnificent beach. I'm not joking, having spent 5 months exploring the beaches of the Cote d'Azure, and Spain's Costa Blanca, and Costa Dorada, Bournmouth beach is just as awesome. so I'm cruising along, estimated 20kph, when I hit a small series of unseen bumps. I handled them fine, but my wheel (ks14c ) must not have liked the power surge required to stay in equilibrium, because I got ( yet another) violent pedal tilt back which threw me down the road, like a baseball batter sliding into home, face first. I hit the ground so hard, I couldn't keep my face Up, so my chin got a bump and scrape that drew blood. Today I have a scab about 2 cm square. i also hit the ground so hard that I bruised the pad of my left thumb and the tip of my left little finger was numb for about two hours. note I was wearing wrist, elbow, and knee pads. No injuries to those areas. Pads are good! additionally, both my shoulders hurt. Right now I move my arms like someone trying to learn how to control new prosthetic limbs, I.e very slowly, and I can't carry much weight. i also scuffed up my leather jacket. I was not wearing a helmet, but a typical bike or skate board helmet would not have protected my face ( I'm looking into this) This has been my worst, overall, and first real face plant ( face hits road) ever. And I was cruising along on level pavement at a sensible speed ( plus the bumps) why did it happen? well, I had been riding a while, and I didn't start the day with a 100% charge, so I was down around 53% power ( looked at app after the crash, not before). As I've said before, less than 60% on a small battery ( mine is 340wh) need to be handled conservatively. So why didn't I handle the trip conservatively? Well, actually I thought I did. Firstly, the LED readout on the ks range is wildly optimistic. It was lit up showing 60 to 80% with its woefully inadequate 5 bar range! But I knew that meant mat least 50%. Secondly, I was riding level, smooth pavement. Thirdly I was not pushing the speed, I was several miles into a mild 15 to 20 kph cruise. Fourthly, I was not showing off. this thing came completely out of the blue. Have I mentioned that I HATE the Kingsong violent tilt back? As I said, it wasn't the bumps that threw me down the road, it was Kingsong sudden and violent tilt back that threw me off. What's the point of an accident avoidance scheme that includes a violent accident as its modus operandi?
  2. 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 were 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 infront, 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" mentally. I'm not saying to wheel in fear, just to build it into your routine, behind the scenes, thought process.
  3. Will this design eliminate face plants? I couldn't tell if they are "wheels" in the front. Wondering what's the purpose of them hanging there? Found it on pinterest.
  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?
  5. Has anyone ever practiced for a Power Shut Off? I understand the illimitable scenarios associated with riding that would make it virtually impossible to practice a cut off for every angle, slope, incline and speed encountered when riding but it would be nice to have some form of game plan second natured in my head if the need ever arises. I've had 2 engine cut offs when flying helicopters. The maneuvers to land in these situations was imprinted in my subconscious after repetitive practice. Both choppers sustained heavy damage upon landing but at least I walked away. I would love to practice for a EUC shut off if there is a sound method out there. Thanks!
  6. Apparently all "face plants" are results of power fails. So that makes me think, there should be a way to make EU still rolling WITH gyro powered by back up battery. Since gyro is only to make things upright , it might not need a primary battery. Does this technology work that way? Or can it have a small back up battery just to kick in when main power quits, just for few seconds so we can stop safely without face plants. Segway must have something like that. We never heard of Segway related face plants.
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