David visits Aerovironment Inc. where they are building a full scale Pterodactyl model that has been designed based on the few clues scientists have about the real animal. Then David visits Burt Rutan, designer of the Voyager, the first plane to travel around the world without stopping. There David and Burt discuss the custom airplane designs and experimants Burt has made. This information is supplied by Chuck N. Thank you, Chuck.