How does he disengage the engine from the lathe after the engine starts and runs on it's own?
Brian, the chuck is holding a sleeve with a 22mm OD sprag clutch inside it. The inner race of the sprag clutch drives a torque limiter, and that is connected to the crankshaft by a (bought) double hooke joint.
The sprag clutch allows the engine to run faster than the lathe.
The torque limiter protects the engine in case it decides to seize up.
When I get to building a proper starter for the engine the sprag clutch will be used in it.
Incidentally, I am hoping that the squeaking noise is coming from the cheap chinese hooke joint, not the engine.
Picture worth a thousand words, I hope:
