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Extremely large wing area, and a very high landing speed on a very smooth runway.
Retractable kevlar or similar wings? Maybe carbon nanotube construction. Also a possibility synthetic spider web material.
Alan may be better placed to judge.
Quote from: jeffreyH on 29/08/2016 17:48:31Alan may be better placed to judge.Yes, I was hoping he might join in. I'm wondering about aspect ratio, high ratio would give good lift vs drag but increase in length would give strength problems because of greater cantilever. I don't think manoeuvrability is an issue. Do you think a hang glider type arrangement would work? Arms deploy when enough air density with a Kevlar type fabric as you suggested.
You would need to use something like rockets or a hypersonic parachute to slow the plane down to merely supersonic speeds. If you had large wings when you hit the atmosphere at hypersonic speeds, the wings would be ripped off.