Most torque converters have a stall speed around 2000 - 2500 RPM. Which also happens to be the RPM range that your vehicle normally runs at cruising speed. At a lower speed you would be simply running a viscous coupling between the engine and transmission.
Then, thereâs the obvious choice: A dynamo attached to one of the bike wheels. (These devices in general are called generators, but when attached to a bike, a generator is traditionally referred to as a dynamo.
1 Presta valve pump. 2  To use a bicycle pump on a Presta valve, remove the valve cap, put it in your pocket and unscrew the Presta nut counter clockwise until it stops. 3  Like before, if your pump has a lockable nozzle attachment, make sure it is unlocked.