I remember as a young teenager going to this event at Glenview NAS in 1972. There was one area where some participants were flying their "Jetex" rocket powered gliders. That was pretty entertaining as some of the model planes literally lost their wings from the thrust of the engine (and consequential high speed) becoming instead missiles and thankfully not hitting anyone. But one "Jetex" glider drifting in circles after having spent its fuel came down just low enough behind a guy sitting in his chair casually watching things and simply tipped off his Panama hat with its nose. Fun times and thanks for sharing!

Thanks for posting 👍