[Charles Martel]

Both terms were used. "Glow head" was the term for the Cox engine's design (and some similar small ones from Testors), because the glow plug was the entire cylinder head. I still have a glow head wrench/spanner in a tool drawer somewhere.

Control line airplanes are still available - do a bit of hunting online.

Heh, remember the Cox-powered dragsters that ran along a taut string? I think there was a bead on the string that shut off the engine and popped the drag 'chute.

[intenseracer]

Oh man! I haven’t thought about those in forever! Had those silly things by the box in my youth. I remember the pee-wee which was .020, and then the larger tee-dee which was .049 to the even larger .090 good times!, my ears still ring when I think of one of those silly motors dialed in just right!

[mowowie]

Cox-powered dragsters sounds like it was a fun idea. i wish i had gotten into it...