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 all seven of the Le Mans through the 1920s, all for Bentley and including the distance victory in 1924. Feeling very pleased with his consecutive victories, Barnato loaned Bentley another £25000. In August, the innovative supercharging pioneer René Cozette was killed making a speed-record attempt when he crashed at 200 kp/h at Montlhéry.In November, Kidston was badly burned when he was the sole survivor in an air-crash in England of a Luft Hansa passenger flight. Results taken from Quentin Spurring's book, officially licensed by the ACO Class Winners are in Bold text. 1929 24 Hours of Le Mans The 1929