A Cyclone "Super Engine" for model airplanes. Has air/fuel mixture adjustment, and shaft and clamping device for mounting propeller. Can be used either on a remote control model or on one controlled by hand-held double wire control such as a "U-realy" controller. Starts from battery connected to top-mounted glow plug. Made in the USA by Cyclone, which was located in Glendale, CA. Suitable for flying a model plane with wing span at least of 3 feet, probably larger.
Has a number stamped into the back of the engine: GR 3717, which you can just barely begin to make out by enlarging one of the images. I do not know if this is an identification number or just a casting number. Make offer.