---Description--- This is a printable version of the rubber band powered toy the Wright bros. Father gave to them in 1878 and inspired them to develop there famous wright flyer. I have designed an experimental propeller you can try thingiverse.com/thing:4628 or purchase a model aircraft propeller. This is very small. --Version 2-- Version 2 has reinforced uprights, hollowed wings, longer wing struts and thicker/stronger end caps.