Aerial refueling craft was eventually modified by Airspeed to Cobham's specification, for a non-stop flight from London to India, using in-flight refueling to extend the plane's flight duration. Meanwhile, in 1929, a group of U.S. Army Air Corps fliers, led by then Major Carl Spaatz, set an endurance record of over 150 hours with the "Question Mark" over Los Angeles. Between June 11 and July 4, 1930, the brothers John, Kenneth, Albert, and Walter Hunter set a new record of 553 hours 40 minutes over Chicago using two Stinson SM-1 Detroiters as refueler and receiver. Aerial refueling remained a very dangerous process
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