My first "big" engine was a testors-McCoy .29 (the series 21, w/ the square-ish finned case) in a Goldberg Shoestring stunter. That was '72 or '73, after the many Cox and Testors .049's...My first R/C engine was an Enya .29 TV ('74) in a Falcon 56, then a K&B .40. Still got most all the engines I've ever owned (it's an addiction) and the collection's still growing at 78 larger than .049...(got about 20 of those, and a few .020's and a .010) Biggest is a 3W 70cc. BTW, I soloed a 13 yr. old student (good kid) just the other day, and I agree, some kids need a "mentor", especially if their dad's don't get into airplanes, and the kid really does...