My first engine was an O & R 23 Ign. in 1947, if I was lucky, I could get it to start and run long enough to get ONE flight in on a Control Line Plane on a Saturday at the school yard near my house. (the noise of others flying control line, is what got me headed in that direction and started my interest in model engines.)

My second engine was an O & R 23 GLOW. Now I could go to the school yard and get about 6 to 10 flights in on a Saturday. I NEVER went back to Ign. engines. I fly SAM Radio assist because I can use GLOW ENGINES.

Ralph