I seem to remember a German University Akafleig (Academic Flying Group)
built and flew a telescoping wing glider in the 1960's. I recently heard a
proposal to use an inflatable airfoil structure that extended the wingspan
of a metal wing at low speeds. It seems very complicated but, if
successful, the payoff is huge for STOL performance plus high speed cruise

Bill Daniels

wrote in message
oups.com...

when I look at my eyeglass case, I see two closely overlapping
wing-type shapes that are being pulled apart for opening.

why would it not be worthwhile to extend wings this way for landing and
departure?

/iaw