Most home-built airships are non-rigid using envelope pressure to maintain their shape. That’s because** rigid airships** normally have to be huge to support their gigantic frame. Rigidity improves maneuverabilty and allows increased speed. JP Aerospace has just designed 1.7 PSI thin-film airbeams **light enough to construct into a small airship. This bodes really well for autonomous and manned small airships. Oh, if you don’t know JP Aerospace, they’re planning to **float in to space.