I had just finished charging up a steep hill at over 20mph on my daily commute to campus. Nothing out of the ordinary; I have done this probably close to 100 times. But as I approached the crest of the hill, suddenly my board got a mind of its own and went into full turbo mode. 100% throttle and no brakes. The acceleration was intense to say the least…
So there I am, speeding towards a red light with two lanes of cars waiting. Luckily I was right by campus near a major pedestrian crossing. The walk signal was ticking down “7…6…5…” My timing could not have been any more perfect, because it happened to be within the few seconds when traffic is stopped both ways for pedestrians.
I flew past the cars, narrowly speeding by in the bike lane. Once in the intersection where I had more space, I threw a heelside shutdown slide with a dozen cars watching. I safely killed my speed, but my board was still stuck on full throttle. With me on my butt, the board took off like a bat out of hell back across the intersection, hit a curb, and then ended up upside down in the grass, still raging at 100% throttle.
Result: I turned off the e-switch, turned it back on, and it was as if nothing happened. Continued riding without issues. I had bluetooth telemetry running through Metr, but the data is not very helpful. All the values seem to flatline when the anomaly took place, and then the recording stopped a few seconds later
So… –> What could have caused this issue? –> Does this seem to be a VESC issue or an issue with the GT2B? –> Any ideas on how to prevent this in the future?
. Setup: (still haven’t posted my build thread…)
- VESC v4.12 (2.18 firmware)
- FS-GT2B Remote (stock)
- SK3-6374 149kV @ 12S
- 18:34 gearing on 83mm wheels (27mph max weighted speed + tons of torque)
Freshly scrubbed 75a Flywheels:
This could have been a very serious accident. Learn how to stop… without your brakes! This was my first time needing to slide an electric board (on super soft 75a Flywheels no less), but definitely not my first time sliding. I have over a decade of experience downhill skateboarding, and so when things like this happen, muscle memory just kicks in. When you’ve practiced something 1000s of times, you aren’t overcome with fear… you just react. I say this not to boast but to reiterate how dangerous skateboards (especially skateboards with powerful motors) can be.
Be safe out there!