Cardboard: The New Plywood?

erco

Maybe... certainly cheap and compliant. Accomplishing turns by "tweaking" the rectangular frame into a parallelogram reminds me of the "wing warping" technique the Wright brothers used in lieu of ailerons.

http://www.popsci.com/diy/article/2013-09/crowdfund-65-running-robot

ctwardell

Some unbelievable cardboard model airplanes:

http://www.feltondesignanddata.com/

C.W.