Can't touch this!
Cool, but I dont think a drill would have have the power to take somene up hill.
"The flexing of the brace also makes an automatic
transmission. As the drill spins faster the chain
jumps to larger chain rings."
I wonder if he built it to flex on purpose knowing it would jump cogs or if it was a surprise and he thought, "Cool, an auto tranny."
I hope he has a lot of cordless drills laying around. I think he's going to be going through a few.
I wonder how a car starter motor and a motorcycle 12 volt battery would work? Starters have excellent torque, and the new compact ones using rare-earth magnets and reduction gears are pretty small. It might be a good "hillclimber" motor.
Unique Vintage Steel
Starters are meant to be run for a few seconds at a time, not continually for minutes (let alone hours) on end. In grade school, I was part of a project that attempted to use a starter motor to move a small wooden go-cart kind of thing. We melted 5 starters within 3 days of building.
Originally Posted by FlatTop
The best electric motor for a bike is still the hub motor. Nothing that I have found matches the performance/size of a hub motor.