Thrown off after nosedive with no pushback warning (nose dive, nose-dive)



  • @thegreck I thought the same thing too. I noticed that it was in classic mode after the 3rd fall, and set it into extreme mode immediately before I started riding. After the 4th nosedive, the board turned off again and was back in classic mode.

    Even if it did somehow switch to classic mode while I was riding, it should still give me pushback at 8 mph.



  • @danny That's scary. Yeah seems like a malfunction.



  • Wanna share with you about my tail dive(not sure it's the good word)...It happens sometimes(less now with experience) only on my backside turn :disappointed:
    https://www.youtube.com/watch?v=3SaDyK1eYz4
    Sensor Foot pressure and placement seems to be very important :smirk:



  • @fabuz glad you were able to run it out! What is shown in that video is not what happens to most people with a nose dive and needs it's own analysis.

    A nose dive happens when your center of gravity is either mostly balanced or towards the nose and you either come off the sensor or touch the nose down trying to go too fast.

    A tail dive happens when your center of gravity is mostly on the tail and you come off or let pressure off the sensor such as might happen if you touch the tail down and lift up or shift your nose foot.

    I have tail dived several times when riding off road down a steep incline with some big in ground rocks. When approaching a rock I'd try to slowdown quickly ending in a tail slide, pressure coming off sensor, wheel locking up, and board shooting out from under me as I fall backwards. After I did that a couple times I started taking this hill much slower to maintain control which worked well.



  • I've had the OW for a few months, love the thing, but there is definitely something going on with nosedives in extreme mode. I've had it happen and ate San Francisco Asphalt more then once, at least three times. Same deal with what has been described on this thread - extreme mode, 50+% power, usually flat, then out of no-where the front hits and I go flying.

    OW devs: We should have the ability to record all the readings (accel, speed, etc) as sort of a flight recorder of data. I'm sure a lot of us would even send it to OW to analyze. There is something going on here, and if you'd just give us the tools - SDK? - we could figure out what's going on from the data.



  • @fabuz I may be wrong, but after watching the video, it looks like you had a pretty heavy pushback and your tail touch and you foot came off sensor all in a second. I've had my tail touch a few times. I found it helpful to practice in a controlled area recovering from a tail touch.



  • @TonyGDTLA when do tailtouches occur? whenever you get a heavy pushback? or how were you able to practice them? :D



  • @chabis sometimes the pushback pushes and without thinking your center of gravity could shift back. And if you lean back in too fast it the tail will touch. I would practice on grass (helmet and stuff) accelerate fast then hard break. Tail will touch and drag. But stay balance and try to recover.



  • @TonyGDTLA good to know... had a few tailtouches up until now but could recover from all of them. still i was worried not to be able to do it every time so this "exercise" should present an opportunity to get "used to it" as much as possible haha. dang it. why's my OW being all weird and stuff. would love to try this right now :(



  • @kwatts Agreed. The option to enable/disable a data recorder from the app would be awesome. Or, release an SDK and see what the community builds.

    There is something going on. It has happened to me several times now: Happily carving at a steady speed on asphalt at ~50% power; feet planted rock steady on both sensors; nose-dive out of nowhere. Ouch.

    Problem is I love riding OW too much to not take the punishment.



  • I had a pretty bad spill this weekend. Nosedive out of nowhere. I ride often and have a good amount of experience on the board. I am very mindful of my feet and the sensors. Early on when i read about this happening to others, i thought it was related to lack of experience. This is definitely a real issue. For me, flat (very hard) surface, 50%+ on the battery, extreme mode. Luckily i was wearing a helmet and wrist guards.. so only have some bad bruises and raspberries on the left ankle, calf, knee, hip and shoulder.

    I do not want to believe it was a malfunction.. because if that is the case, makes me a bit nervous to ride again. But i love it so much. So i ordered some more safety gear.. will wear impact shorts, knee and elbow padding.

    Will report back if it happens again. Lets hope not. but i think we have enough reports of this occurring with riders who have had some decent time in the saddle for FM to look into it.



  • An experience and some questions:

    ~Background~

    Been riding for a few weeks, always in classic mode, new board so new firmware. Have ridden on smooth pavement, rough pavement, hard dirt, soft slightly muddy dirt, grass. Until this weekend never had the OW do something that I didn’t understand. When first learning I didn’t understand how to work the sensors so I was run over or thrown off in reverse a few times. I believe I now have a good handle on these and can stop and dismount easily in 1 spot without really thinking about it. I don’t ride too fast and don’t think I’ve felt pushback.

    ~The Experience~

    This Sunday I thought I would get in a ride before the rain started again here in SF. Streets were dry. I live in some moderate hills and cruised around and up and down not over 6-7mph. Then, with 60%+ battery remaining, I was going straight on a relatively flat street, probably a bit slower than my average speed. While it happened pretty fast, my recollection is that without any warning and without losing my balance. the nose of my board ate the pavement. Wearing helmet and wrist guards, I launched forward – as a snow sports guy I put my right (forward) arm out by reflex. The board continued to travel forward at a 45% angle to the right, thunking loudly against a garage door where it stopped. I dislocated my right arm and spent the rest of the day in the UCSF Emergency Room high on Dilaudid and Fentanyl.

    ~Questions~

    Obviously I would like to understand why this happened. From reading this thread I see some theories but the root cause is unclear. Given the occurrence from time to time of similar experiences, I believe it would be prudent for FM to provide collection of and selected access to real-time actuator/sensor data. If the OW lacks sufficient memory I don’t think it would be hard to log across Bluetooth to the phone. I also think it would be in the company’s best interest in order to improve and refine the behavior of the OW. I would understand a potential reluctance based on litigation risk but it needs to be done and the lawyers would just have to do their best to protect the company, as they do in all motor vehicle industries.

    My second question is somewhat higher level. When I am cruising on pavement at a consistent speed in classic, the board sometimes feels like it is leaning a bit forward for a few seconds then leaning a bit back for a few. I am trying to stay balanced over the wheel and not rock forward and back, but I am still getting this feeling. Anyone else find this?

    Closing note to FM: I strongly encourage you to follow up on this issue. Right now you have a loyal set of users who are willing to take some bruises for the company and the product; we are certainly not looking to damage the company. Help us to help you improve the behavior of the product and make it more attractive to the mass market. If you need some help or ideas, just let me know. Thanks!



  • @dj.rknz Ouch....that sucks. Sorry to hear. Hope your arm/shoulder heals soon.

    I am on this thread with a couple of similar experiences and a similar request to @onewheel. I hope they do follow up and/or let us begin to collect the data. After each of these "events", it has taken me longer and longer to trust the board and ride again. I love this product and don't want to loose faith in it.

    Regarding your questions, the forward/back thing goes away as you ride more. I suggest trying Extreme mode. Seems to be a better (albeit less carvey) ride.



  • I was riding today and rode on and off for about 3 miles. On coming back to my car, I was heading up a slight incline and going what I estimate to be between 6-7mph.. All of a sudden the wheel just locked and I happened to nose dive pretty bad. Thankfully I was wearing my wrist guards, but my arms got shredded pretty bad. I've been trying to analyze what happened. At the end of the day, until OW can give us more recordable data.. We are not going to be able to prove whether it's the rider, board or conditions.

    I would happily build an alternative app if FM/OW would open up their data api to bring the sensor data into another app.

    Until we get some data collection, we're shooting in the dark as to why these stop the way they do.

    OK back to scraping asphalt out of my arms. Cheers



  • @Mynticelx said:

    I was riding today and rode on and off for about 3 miles. On coming back to my car, I was heading up a slight incline and going what I estimate to be between 6-7mph.. All of a sudden the wheel just locked and I happened to nose dive pretty bad. Thankfully I was wearing my wrist guards,

    Same thing here yesterday.. Pretty sure through no fault of my own.. It's a bit disconcerting when these things happen..



  • The Onewheel is an inherently unstable powered unicycle, not a self-balancing device. All of its sophisticated sensors and controllers merely give it a way to respond to the control input from the rider. It's more stable than a traditional unicycle because the control system can make more precise adjustments to the wheel more rapidly than humans can by turning a crank with their legs, and because the tire is wide. Aside from that, you're still learning to balance a unicycle, but this one goes a lot faster.

    New riders have to work hard just to avoid falling, and slow speeds feel fast. Pretty soon they get the hang of balancing. They get the hang of steering. Their confidence improves. Slow speeds feel very slow. They don't feel like beginners anymore.

    The stability and power they get from the motor and electronics come with a trade-off: Unlike legs turning a crank, the motor of a Onewheel isn't wired into the rider's brain, so the rider's awareness of the motor's limits is vague. As the rider approaches those limits, the motor loses its ability to improve stability, or even to provide useful feedback to the rider.

    At that point, the rider has become the pitiable fool (and let's be honest: We are all this fool) who deliberately rode a powered unicycle in Extreme mode (so that it would be even less able to protect the fool from himself) at a higher speed than he can safely fall...

    Anyone with a defective board should certainly have it serviced. The rest of us should understand that we're learning how to ride a powered unicycle at unsafe speeds, and we should adjust our expectations accordingly. It's not safe, nor is it easy, and that's part of the appeal. If you're taking high-speed nosedives, congratulations! You're no longer a beginner! Here's another piece of good news: You're not an expert yet, so you still have lots of cool stuff to learn.



  • @badcheese nailed it. (and this is why you should always wear a HELMET.)



  • @badcheese While I agree with everything you said.. There are some of us that were till in classic mode that this has happened to. I'm not complaining and don't necessarily believe it's the fault of the OW... But just like a unicycler (if that's even a word) would check their mecahnical parts to their bike, I would like the same for the OW. Stream me the data of the ride to understand why these things happen. What as the speed, gyroscope angle, engine rotation, etc. It's not too much to ask to FM to open that up to its riders.



  • @dj.rknz I would like to know that someone in a senior management or engineering role at FM is reading this thread. Could you please confirm that this is the case? Thanks very much.



  • @badcheese I'm afraid I must disagree with Mr Cheese on this. A unicycle is an analog device under the direct and absolute control of its rider. Its instability and difficulty are due entirely to the physics of its design. This is the reason it costs $150 instead of $1500.

    A OW, on the other hand, is a digitally intermediated, highly-abstracted ride by wire system that depends heavily on behaviorial models embodied in software along with a complex network of sensors and actuators. The fact that it is not self-balancing is immaterial; more material are the facts that the behavior of the system depends almost entirely on the assumptions and judgements of the system's designers, how these are embodied in software and component selection, system testing and revision, heavy end-user input and honest reassessment, and more testing and revision. In this regard a OW is more like a fighter jet than it is like a unicycle. As with the jet, there can be strong perceived pressure on management to "bury the data"; this must be resisted at all costs, particularly with a system as immature as the one we are talking about.


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