Cannings Posted April 4, 2018 Share Posted April 4, 2018 In all honesty i'm still trying to rack my brains as to what happened, I was doing my usual cruise down the last part of the bypass at around 25-28 mph, I had just got to my business park so i'd slowed down to about 10-12 mph to go round quite a sharp bend, I was heading into the business park to cut across the road and something made me fly forwards off the wheel Now the confusing thing is the wheel I don't really know how to describe but didn't feel like it lost power, more like possibly I hit a really big stone I hadn't seen maybe, there aren't any bumps in the pavement where it happened but all I can say is thank god I bought a full face helmet as my chin was pretty much first to hit the ground, my shoulder and elbow feel a bit dinged up but nothing too bad and the helmet seems to have just about survived too, guessing this was due to the lower speed. I don't know if this was a cut out or not, and the wheel was still alive when I picked it back up stood it up right to reset it, and carried on the very very slow painful last 1 minute to work. Couple of pics: Link to comment Share on other sites More sharing options...
Chriull Posted April 4, 2018 Share Posted April 4, 2018 @Canningsgreat you had the right safety gear and nothing bad happened to you! You have the wheellog logs too of the accident? Link to comment Share on other sites More sharing options...
Cannings Posted April 4, 2018 Author Share Posted April 4, 2018 Yeah they are on my phone, i'll get them off and have a look Link to comment Share on other sites More sharing options...
Cannings Posted April 4, 2018 Author Share Posted April 4, 2018 I've trimmed it down to just be the crash, looks like I had a massive current / power spike even though i'd slowed down crash.xlsx /edit which in turn set the battery to 0, and probably caused it to throw me Link to comment Share on other sites More sharing options...
Chriull Posted April 4, 2018 Share Posted April 4, 2018 30 minutes ago, Cannings said: I've trimmed it down to just be the crash, looks like I had a massive current / power spike even though i'd slowed down crash.xlsx /edit which in turn set the battery to 0, and probably caused it to throw me Thanks. Seems like something stopped/blocked the wheel -> current goes up and voltage down. Some stone, branch or similar? With the high current and lower voltage the limit is reached were the motor cannot produce more torque -> the wheel tilts forward (speed goes down) Link to comment Share on other sites More sharing options...
Cannings Posted April 4, 2018 Author Share Posted April 4, 2018 Yeah, as I said i'm not sure if I did hit anything or not, will have a look if anything is there on the way home, I hadn't noticed anything but I may have missed it Link to comment Share on other sites More sharing options...
Pard Posted April 4, 2018 Share Posted April 4, 2018 Well done wearing the right gear! Really saved you. Link to comment Share on other sites More sharing options...
Cannings Posted April 4, 2018 Author Share Posted April 4, 2018 Just now, Pard said: Well done wearing the right gear! Really saved you. Definitely saved my face, I think the helmet is okay to carry on being used but my jacket is ripped in places, so i'm going to look to get a motorcycle jacket instead a bit sturdier Link to comment Share on other sites More sharing options...
Cannings Posted April 4, 2018 Author Share Posted April 4, 2018 Purchased: https://www.amazon.co.uk/gp/product/B01J26S9FK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 https://www.amazon.co.uk/gp/product/B01HLCZW02/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 Not messing around with snowboarding gear anymore Link to comment Share on other sites More sharing options...
Pard Posted April 4, 2018 Share Posted April 4, 2018 You did not mention what you were wearing on your hands/wrists. What do you wear to protect the hands, and did it work as well as you wanted? Link to comment Share on other sites More sharing options...
Cannings Posted April 4, 2018 Author Share Posted April 4, 2018 In all honesty I only had snowboarding gloves on, I wasn't wearing my wrist guards as I guess i've become a little complacent, but the bruises are mainly my elbow and shoulder anyway, thus the padding in the new jacket lol Link to comment Share on other sites More sharing options...
Pard Posted April 4, 2018 Share Posted April 4, 2018 1 minute ago, Cannings said: In all honesty I only had snowboarding gloves on, I wasn't wearing my wrist guards as I guess i've become a little complacent, but the bruises are mainly my elbow and shoulder anyway, thus the padding in the new jacket lol Indeed. It is so easy to get complacent on these wheels. Link to comment Share on other sites More sharing options...
WARPed1701D Posted April 4, 2018 Share Posted April 4, 2018 Glad you are OK. As others have said already you have proven the worth of a full face helmet (very nice helmet it is too!) I agree with the consensus that you struck something or pulled something into the wheel well that increased rotational resistance. Your speed dropped 10mph/kph in an instant and the current draw went through the roof. Amazing to see the voltage drop in this circumstance. Remind me of your wheel type and battery size? This is the value of logging every ride. The forensics are invaluable. While you had a nasty spill you can be confident from the data that the wheel did its best to keep you upright and this was not a cut out. I would however open it up and look for any heat damage to the wires and components. The current surge was brief... But extreme. Link to comment Share on other sites More sharing options...
meepmeepmayer Posted April 4, 2018 Share Posted April 4, 2018 3 hours ago, WARPed1701D said: I would however open it up and look for any heat damage to the wires and components. The current surge was brief... But extreme. Heat damage that fast? If anything, the current would have fried a mosfet. As that didn't happen... But can't hurt to have a look whether everything looks alright anyway! Link to comment Share on other sites More sharing options...
kour Posted April 4, 2018 Share Posted April 4, 2018 full face! glad the tsg did its job. you might want to consider kneepads, too... you're lucky you didn't smash them. i flew off about 2 months ago and both knees were baaaanged up. stupid because i own a pair. ride on! Link to comment Share on other sites More sharing options...
Cannings Posted April 5, 2018 Author Share Posted April 5, 2018 16 hours ago, WARPed1701D said: Glad you are OK. As others have said already you have proven the worth of a full face helmet (very nice helmet it is too!) I agree with the consensus that you struck something or pulled something into the wheel well that increased rotational resistance. Your speed dropped 10mph/kph in an instant and the current draw went through the roof. Amazing to see the voltage drop in this circumstance. Remind me of your wheel type and battery size? This is the value of logging every ride. The forensics are invaluable. While you had a nasty spill you can be confident from the data that the wheel did its best to keep you upright and this was not a cut out. I would however open it up and look for any heat damage to the wires and components. The current surge was brief... But extreme. I have the 1020w tesla, I had a look around the pavement on my way home and all I could see was dip in the pavement not too deep, but I guess it could have been me accelerating out the turn I had just made into the business park and catching the far edge of this dip perfectly which sent my weight well forward to begin with, then the wheel thinking that weight shift was me saying gogogogogogo and then going pop, thats all I can think of 9 hours ago, kour said: full face! glad the tsg did its job. you might want to consider kneepads, too... you're lucky you didn't smash them. i flew off about 2 months ago and both knees were baaaanged up. stupid because i own a pair. ride on! Yeah, the new trousers I just bought come with knee pads built in, and the jacket has shoulder and elbow pads so hopefully should be a lot better protected after that, the TSG was fantastic as I really did come down face first, and after inspection just a few scratches to the front, and to the visor (which I have a spare for) means thank goodness I don't need to replace the whole helmet either Link to comment Share on other sites More sharing options...
OliverH Posted April 6, 2018 Share Posted April 6, 2018 On 4.4.2018 at 9:02 AM, Cannings said: I've trimmed it down to just be the crash, looks like I had a massive current / power spike even though i'd slowed down crash.xlsx /edit which in turn set the battery to 0, and probably caused it to throw me It protected your battery. But this is not a safety (overall) behaviour to deal with this issue. On a proper design a treshold would cause a warning/ limitation that you don‘t get in an unsafe condition. Link to comment Share on other sites More sharing options...
WARPed1701D Posted April 6, 2018 Share Posted April 6, 2018 9 hours ago, OliverH said: It protected your battery. But this is not a safety (overall) behaviour to deal with this issue. On a proper design a treshold would cause a warning/ limitation that you don‘t get in an unsafe condition. Why do you say it protected the battery. I see that a huge current draw and massive voltage drop but no loss of power supply to suggest the BMS or mainboard cut the power. Link to comment Share on other sites More sharing options...
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