Mine was a Cox .049 mounted on a Carl Goldberg Lil Satan in the early 60's. It had a silk span covering with a red Sig dope finish. It looked really good. I spent weeks mowing lawns to earn enough money to buy it and then build it. My brother had a friend who could really fly. He offered to fly it first, but since I built it I wanted to fly it. It lasted about 15 seconds as I did a wing over into the pavement.

I should have let Ernie fly it.
Got back into the hobby in 2000. My first RC engine was a Thunder Tiger .46 Pro in a Sig LT 40. I now have 3 Thunder Tiger .46 Pros, 2 Magnum XLS 46As, 1 Thunder Tiger .61, 1 OS .61FX, 2 Enya 120R 4 strokes, 1 Magnum XL .91 4 stroke, OS FS .91 4 stroke, and a Saito 125a 4 stroke. My wife thinks I'm crazy especially after I try to explain that I have a rather modest collection compared to many.
John