FCAS final exam questions with correct answers

Who is credited for the principle of Buoyancy? Answer Archimedes Balloons, what year, who? Answer - 1783, Montgolfier Brothers (Joseph and Etienne) -- released first, manned, free ascent hot air balloon - 1783, J.A.C. Charles -- first manned flight of a hydrogen filled balloon Cayley, what were his contributions? Answer 1804, first model airplane flown 1809, built full scale airplane Penaud, what were his contributions? Answer - first airplane with inherent lateral and longitudinal stability - 1871, 20" rubber band powered model; with dihedral, tail surface, and pusher propeller Lilienthal, what book did he write, what were his other contributions? Answer - wrote "Bird Flight as a Basis of Aviation" - built and flew a series of gliders beginning in 1891 Chanute, Pratt Truss, assisted others (Wright Brothers) Answer - civil engineer - built and tested gliders based on Otto Lilienthal's designs - wrote "progress in flying machine"