Starting nearly from scrap the brothers built their early gliders and airplanes using aeronautical information supplied by other inventors of their day, some of who even died in the crashes of their fixed wing craft, and from information furnished by the Smithsonian Institute. Inspired by the work of so many, they set upon themselves to improve on the designs and miss-calculations that caused their contemporaries to ere in the design of the airplane wings.



With their own cleverly devised and constructed wind tunnel, not of rubber band power but of motorized chain power, they measured the lift and inefficiencies of the new wing designs, casting aside the idea of any rubber band powered flight, having already determined from live tests on the dunes that the wings they had already build must have been conceived from a faulty mathematical formula that modeled how a wing was supposed to lift into the air. They corrected the formula and proceeded further with an airplane wing that could rotate, the propeller, to drive the air and move the plane forward. With dual proper propellers built not of balsa, but of glue and three layers of spruce measuring eight feel long, no rubber band would have been able to turn those propellers and power the airplanes long enough to sustain a decent flight.



Winding the propeller by hand, children today do not have to contemplate the miracle performed a hundred years ago that would shrink the world and make flight a reality. They wind by motor or hand the airplane's rubber bands made from rubber or modern elastic polymers called elastomers, and toss the fragile craft to the wind to fly into the sky, propelled merely by wind power until the airplane exhausts it's energy in a dying gasp and begins a gentle decent to the ground. The rubber band will not hang on the sun or any other celestial body, forbidding the child to amuse himself again with it's thrusty liftoff.