The DH42 'Dormouse' was a single-engine reconnaissance-fighter, designed against Specification 22/22 for 'Army Co-operation Roles', a range of inter-war aircraft which gave support to various military ground units.
The sole example Doormouse (J7005) flew for the first time at Stag Lane on 25th July 1923, being powered by a single 360 hp Armstrong Siddeley Jaguar II engine.
The type was of conventional all-wooden construction and a large oval cut-out was provided in the upper wing centre section to provide an excellent upward view for the pilot. The lower wing was of a reduced span with a single-axle undercarriage.
Later and following trials of the DH42A Dingo I, the Dormouse J7005 was modified and fitted with a more powerful 420 hp Jaguar IV engine.
It served at the Royal Aircraft Establishment, Farnborough with the Wireless & Photographic Flight for experimental radio work from March to December 1925, when it was written off.
The next DH42 variant was the DH42A 'Dingo' and it was a further development of the Doormouse, built again as an Army Co-operation and Close-Support aircraft against Specification 8/24.
Two Dingo examples were actually built: (J7006 - Dingo I) and (J7007 - Dingo II) and the type was intended as another potential replacement for the DH9A. The Dingo I was powered by the Bristol Jupiter III engine, changing to the Jupiter IV for the DH42B Dingo II.
The crew comprised of a pilot and gunner, with four bombs carried under the lower wing. The larger engine resulted in significant changes to the forward fuselage and relocation of the forward-firing armament.
The Dingo I (J7006) flew on 12th March 1924 although after trials at Martlesham Heath it was destroyed after it broke-up mid-air over Northolt on 5th June 1924.
The Dingo II (J7007) first flew in September 1924, piloted by Hurbert Broad and was fitted with the slightly more powerful Jupiter IV engine and featured all-metal construction, increased fuel capacity and external message pick-up gear under the rear fuselage.
It was subsequently flown to RAE Farnborough in November 1926 whereafter it was permanently grounded before being broken up sometime later.
Variants & Numbers built
|2 Seat reconnaissance airraft with an Armstrong Siddeley Jaguar II radial engine|
DH42A Dingo 1
|2 Seat reconnaissance aircraft with Bristol Jupiter III engine|
DH42A Dingo II
|2 Seat reconnaissance aircraft with Bristol Jupiter IV engine and steel frame|
|DH42 Dormouse||DH42A Dingo I||DH42B Dingo II|
|Powerplant||One 360 hp AS Jaguar II, or One 420 hp AS Jaguar IV||One 410 hp Bristol Jupiter II||One 436 hp Bristol Jupiter IV|
|Span||41 ft 0 in||41 ft 6 in||41 ft 6 in|
|Maximum Weight||3,897 lb||3,700 lb||4,038 lb|
|Capacity||Dingo: Pilot and rear gunner positions; provisions for four 112 lb bombs. Two forward firing synchronised Vickers machine gun and single Scarff-mounted Lewis gun for self-defence.|
|Maximum Speed||125 - 128 mph||127 mph||128 mph|