Made for the "Smallest Possible Airplane" challenge thread.
http://forum.kerbalspaceprogram.com/showthread.php/34067-Smallest-possible-airplane
Kerbal Space Program version 0.18.1
Totaling .195 mass (not including launch girder) this "glider" has no engine and propels itself by flapping two AV-R8 winglets. I'm almost certain that gaining speed this way is a glitch. Due to some issues I had with my recording software the video recorded at about 4x normal speed, but that's OK because the flight was boring at normal speed anyway.