George, you are dating yourself with the 1950's. I started with glow in 1950 and later diesels. My favorite from the late 1950's was the Super Tigre 2.5 cc G-30 rear drum induction with ball bearings. Later there were G-31 and G-32 one 1.5 cc and the other 1 cc. A couple years back I ran the 1 cc version for a friend and a real nice engine. I may be wrong on the G-31 and G-32 designations. The first R/C model I saw fly was in the early 1950's and a diesel on a power pod on a glider type model. An older fellow used a small British diesel possibly 1 cc for power on this model. The diesel fuel was in a glass jug similar to what vinegar came in at the time with a small diameter lid. The fellow taught how to start and run a diesel. Also how to mix fuel. My favorite diesel from the 1960's was the Webra Mach II also a 2.5 cc engine with no exhast stack. Jack Hiner