[samwichse]

Originally Posted by The Toecutter

In the long run, I plan to build a 100 lb "car" inspired by Electrathon racers that can be similarly operated, except that the rider will be able to add pedal input at all operable speeds including what may be a top speed of 100+ mph, but will still be able to turn everything off and hopefully the machine will be efficient enough to pull sub 4-hour century rides or sprints to 40+ mph on human power alone. The plan is to make a full suspension roll cage on wheels that uses light-duty DOT 16" motorcycle rims on all 3 wheels with Mitas MC2 low rolling resistance tires, hydraulic brakes, and a Schlumpf HS drive on the pedal crank with a sufficiently wide gear range to allow anything from slogging up steep hills at 3 mph with a 60 rpm cadence to careening down the highway at 100 mph with a 140 rpm cadence, and everything in between. Having both a human power drivetrain as well as an electric hub motor will also greatly reduce the risk of ever being left stranded. I think a 100 mile range @ 70 mph and 300 miles range @ 30 mph is possible in such a thing with a very modest 1.5-2 kWh battery pack. Performance would only be limited by downforce/lift and the type of hubmotors available on the market. There are no synchronous reluctance or synchronous reactance hub motors of appropriate size with bicycle cassette/freewheel compatibility on the market, but a 7 lb motor of this sort could make 50 horsepower peak and 6-8 horsepower continuous if it were made, which would allow Tesla-like acceleration. In such a low mass vehicle, it would be difficult to design it for stability at much of anything over 100 mph, so that would be a good end point for ultimate top speed, no matter the peak power.

Something like this?
https://kronfeldmotors.com/specs/



Although it's a series hybrid, your pedaling just goes to charging the battery and there's no direct connection to the wheels.