Aircraft had to carry three days' rations per crew member, floats (e.g. buoyancy aids or personal flotation devices), smoke signals, and efficient instruments.
First off the line, watched by a crowd of 60,000, were Jim Mollison and his wife Amy Johnson in the Comet Black Magic, and they were early leaders in the race until forced to retire at Allahabad with engine trouble.
This left the DH.88 Grosvenor House flown by Flight lieutenant C. W. A. Scott and Captain Tom Campbell Black well ahead of the rest of field, and they went on to win in a time of less than three days, despite flying the last stage with one engine throttled back because of an oil-pressure indicator giving a faulty low reading.
[6][7] Lyle Ferris, the chief electrical engineer of the post office, went to the power station and signalled "A-L-B-U-R-Y" to the aircraft in Morse code by turning the town street lights on and off.
[7] Later that year the DC-2, on a flight from The Netherlands to Batavia, crashed in the Syrian desert near Rutbah Wells in western Iraq, killing all seven on board; it is commemorated by a flying replica.