I am looking for a one way clutch or you may call it a sprag or over running clutch. I am not using it for aircraft purposes. There are industrial ones available, but I need one for higher speeds and torques than that. I've heard that helicoptors use them so the rotor can continue to spin if the engine stops? Any info about where I can find a couple of them, about the HP and RPM they normally see or about what they are worth is much appreciated.

Thanks

craig_ulmer@hotmail.com