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
1929 24 Hours of Le Mans 1929 24 Hours of Le Mans The 1929 24 Hours of Le Mans was the 7th Grand Prix of Endurance that took place at the Circuit de la Sarthe on 15 and 16 June 1929. In the most dominant display in the race to date, Bentley achieved a comprehensive victory taking the first four places on distance. Bentley director Woolf Barnato repeated his victory of the previous year, co-driven this time by fellow Bentley Boy "Sir" Henry “Tim” Birkin. They had led from start to finish, setting a new distance record and lap record. The race was relatively quiet, without