This would be a human powered ornithopter with bouncy weighted wings.
The wings could be made bigger because of the weights (maybe at the tips), and a resonance could be set up.
You would probably have to start this project off working only in still air and then prototype up to something sturdier.-- JesusHChrist, Feb 02 2017 [-]. You do know that there are companies that let you go in real planes in exchange for money?-- MaxwellBuchanan, Feb 02 2017 The weights wouldn't add energy, only store it, and at a much higher weight cost than other methods.-- Voice, Feb 02 2017 I like this as an adjunct to a conventional Hoppity Hop riding balloon, or possibly Rody. The idea being that the energy stored on prior hops makes increasingly high and long hops possible. I suspect that there would be a point of diminishing return, though. Maybe not.-- bungston, Feb 04 2017 Material science would have to come to the party with a very light and strong material that enjoys the bounce.-- wjt, Feb 04 2017 // and then prototype up to something stupider //
Oh, my mistake, I must fetch my reading glasses.-- BunsenHoneydew, Oct 30 2017 random, halfbakery