In the past you ran a number of letters covering questions on the four-cylinder, two-cycle engine used on the target drone aircraft used by the military around the end of World War II.
Igor Bensen designed and sold plans for a gyrocopter using the engine in pusher configuration.
Enclosed is a picture of just such a target drone, which hangs from the ceiling of Jerry’s Surplus Sporting Goods Store in Everett, Wash.
Don Passow
Standwood, Wash.