The DH.34 entered service with Daimler on 2 April 1922 on the Croydon-Paris service.
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The 1923 Daimler Airway de Havilland DH.34 crash occurred on 14 September 1923 when a de Havilland DH.34 of Daimler Airway operating a scheduled domestic passenger flight from Croydon to Manchester crashed at Ivinghoe Beacon, Buckinghamshire, England, killing all five people on board.
In October 1920 Tyle, accompanied by Flight Lieutenant George Thompson, set out to complete the last leg of the first trans-Canadian flight (which had started in Halifax in July), departing from Calgary in a de Havilland DH-9A.
Major Rowell responded by forming a squadron of five De Havilland DH-4 biplanes armed with machine guns and four twenty-five pound bombs each.
It was re-engined with more powerful, 937 hp (699 kW) Gnome-Rhône 14N radials in 1937 before being entered into that year's Istres–Damascus–Paris race, finishing fifth in a time of 21 hours 3 min, with de-militarised Savoia-Marchetti SM.79s bombers occupying the first three places and a de Havilland Comet racer finishing fourth.
The third aircraft was the first to fly, and it was completed by Airco at Hendon as the DH.14A, a two-seat long-range mail plane.
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The aircraft did attempt the first flight between London and Cape Town in February 1920, but it only got as far as Italy, where it force-landed near Messina.
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The two military aircraft were completed by de Havilland at Stag Lane Aerodrome in 1921 and used for trials; one suffered a fatal crash at Burnham Beeches on 10 February 1922 and no production aircraft were ordered.
The de Havilland DH.37 was a British three-seat sporting biplane of the 1920s designed and built by de Havilland for Alan Butler.
The Chief of the Air Staff, Group Captain Richard Williams, and two crew members undertook a three-month, 10,000 mi (16,093 km) round trip from Point Cook, Victoria to the Pacific Islands.
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Cobham flew the aircraft on a 16,000 mi (25,750 km) flight from Croydon Airport to Cape Town between November 1925 and February 1926.
The first aircraft was exported to Australia in 1927, as a floatplane it capsized in Sydney Harbour in January 1931.
The aircraft was completed by Gloster's at Brockworth, with whom de Havilland had a military aircraft manufacturing agreement, fitted with three 595 hp (444 kW) Bristol Jupiter XFS radial engines.
QANTAS used Fox Moths to replace de Havilland DH.50s on the Flying Doctor Service.
For a while the Squadron operated a detached flight at RAF Wick running a regular service to Reykjavík in Iceland using de Havilland DH.91