Bill Cosby a Modeler?

I've been watching some old Cosby shows (Dr. Cliff Huxtable) and noticed that in the basement set, under the landing hangs what appears to be a stunter. Never a close enough shot to ID it but its there. That in itself could be a coincidence but a couple nights ago there was a special on the Cosby show production and during the interview with Cosby there was a model (RC trainer sort of) behind him. Odd that these would just be props in the 2 different settings, anybody know about this?

My wife collects Ozzie& Harriet episodes. In one, Ozzie helps Dave& Rick start a C/L plane in the boys' room. Appeared to be an early inverted-engined, fully-cowled 'C' class Proto, as we know them now.
I think Dave was into it, as Rick only talked about music the few times I talked with him. Anybody remember seeing them at Mile Square in the old days?
Mike