First CL was a Christmas present someone got me, a plastic RTF with a Wen-Mac engine. Somewhere around 1948-49, I think. Got the engine started ONCE, at least 10 years later, using Fox Blast (40% Nitro?), a 7-4 prop, and a Walker Balloon tank. After the couple minute run, the engine was VERY free turning. After a few other kits, built an Enterprise profile P-51 with a Cub .099, which FINALLY got me quite a number of flights. But, for some reason, as soon as I tried for my first loop, the engine got quiet, plane became toothpicks, and I still have that Cub. Slightly less apparent power than a Cox Black Widow.