Geodetic Glider

A half-metre wing-span model of a Waco assault glider, as used by US forces in WWII.

I'd set my students the challenge of designing a glider, in groups, which could be 3d printed and then launched fro a bungee catapult - it was a design and project management exercise rather than a flight challenge, but we encountered a problem which proved quite difficult to overcome.

Printing in PLA, the gliders all came out very heavy, which lead to a very high wing-loading and, as a result, very poor f