Dick, are you saying that you were around for the beginnings of Cox .049s in 1945 and old enough to build models? Wow! There were earlier 1/2a engines, but Cox made them popular.
Slightly off topic, but there was some experimenting in the 1/2a forum awhile back with SWR's (sheet wing racers) and at 8oz they flew like real pylon racers and were nearly indestructible unless you nosed in. Thanks to these electric fliers, the equipment available for small glow is fantastic!