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Posted

Video made sometime in the last month. The EUC was something like GT Pro or ET Max. I don't recall the rider's persona.

 

Posted (edited)

Found it:

Wheel Good Time on an ET Max:

https://www.youtube.com/watch?v=SSJoKWCkxsE&t=273s

Braking from 30 mph in 30 feet, about 1 g. Sports cars and sport bikes can do this.

ET max weight = 108 lbs, tire diameter 20 inches.

Assume Wheel Good Time weighs 200 lbs with gear. 1 g braking means the force between tire and pavement is 308 lbs, which translates into 257 ft lb of torque. The motor can only match the torque of the rider so Wheel Good Time would have to exert 257 ft lb of reverse torque onto the ET Max to brake at 1 g and the center of mass of EUC + rider would have to be on a line 45° behind the contact patch. Relative to the pedals, the rider has to lean back 45° for the 1 g of braking and lean back further still for the 257 ft lb of reverse torque. I don't know how many riders could do this.

If this is uncorrected speed, the actual speed could be 27 mph instead of 30 mph, which would be 0.83 g braking.

Edited by rcgldr
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