Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hell again Jim,

You might want to try what used to be used on old IC drive model racing cars, it consisted of a driven fixed loose pulley on the drive shaft another pulley splined or the like to the shaft with a spring pushing it against the loose pulley with a means of holding it off to disengage.  A piece of cork is glued to one of the mating faces of the pulley. Basically the same as the old cone clutches that were used on cars. I hope this makes sense?

Take care Tony.