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
Cessna 150 Cessna 150 The Cessna 150 is a two-seat tricycle gear general aviation airplane that was designed for flight training, touring and personal use. The Cessna 150 is the fifth most produced civilian plane ever, with 23,839 aircraft produced. The Cessna 150 was offered for sale in the 150 basic model, Commuter, Commuter II, Patroller and the aerobatic Aerobat models. Development of the Model 150 began in the mid-1950s with the decision by Cessna Aircraft to produce a successor to the popular Cessna 140 which finished production in 1951. The main changes in the 150 design were the use of tricycle