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.
Since I plan to ride my bike a lot, and power a lot of electrical devices â not just headlights â with the power I generate, Iâm going to go with a hub dynamo. Itâs more expensive, but itâs much more mechanically efficient, and the amount of power I can generate in a dayâs ride is a big concern to me.