Armadillo Aerospace, a rocketry company that entered the X-prize and was founded by John Carmack has recently done some work on a rocket propelled badger light aircraft for a racing league using their hybrid (liquid fuel, cryogenic oxidiser) rocket engine. Much details, pics and video...
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LOL, I can imagine a circuit in one of these:
"A261 departing runway 27L, downwind, finals, clear of the active"
Thanks for sharing. My favourite picture is this one:
The big-ass ball says "Space age bloody rocket, mate" to me.