Question Mark (aircraft) Question Mark (aircraft) Question Mark (""?"") was a modified Atlantic-Fokker C-2A transport airplane of the United States Army Air Corps. In 1929, commanded by Major Carl A. Spaatz, it was flown for a flight endurance record as part of an experiment with aerial refueling. "Question Mark" established new world records in aviation for sustained flight (heavier-than-air), refueled flight, sustained flight (lighter-than-air), and distance between January 1 and January 7, 1929, in a non-stop flight of more than 150 hours near Los Angeles, California. Following the record-setting demonstration, the C-2A was returned to transport duties. In 1931 more powerful engines replaced
Richard 150 Commuter dual controls and a baggage space behind the seats. After the prototype first flew in 1972, a new wing was designed with different wing section and an area of . Richard 150 Commuter The Richard 150 Commuter is an American two-seat cabin monoplane designed and built by The C.H. Richard Company of Lancaster, California to be sold in kit form or as plans for amateur construction. A development of the early Richard 125 Commuter flown in 1969, the 150 Commuter is a braced high-wing monoplane with all-metal construction of the wings, monocoque fuselage and tail unit. It has a non-retractable