Martinsyde F.1


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Martinsyde F.1

The F.1 two-seat fighter was conceived late in 1915 as a tractor biplane in which the gunner occupied the forward cockpit and stood upright to fire a 7.7mm Lewis gun on a mount built into the upper wing centre section. Powered by a 250hp Rolls-Royce Mk III engine (later to become known as the Eagle III), the F.1 suffered a somewhat protracted development and, by the time that it was officially tested in July 1917, it was already obsolete. Obviously not acceptable for operational use, the F.1 was not further developed.

  Take-off weight1479 kg3261 lb
  Empty weight997 kg2198 lb
  Wingspan13.56 m45 ft 6 in
  Length8.86 m29 ft 1 in
  Height2.59 m9 ft 6 in
  Wing area43.38 m2466.94 sq ft
  Max. speed175 km/h109 mph

Ian C Pearson, e-mail, 19.03.2009 20:39

Two Martinsyde F.1 Tractor Biplane Fighter Prototypes (250hp Rolls-Royce Mk.111) Ordered 16.9.16 under contract WO Contract No87 /A /435, Serial Number A3933 & A3934

A3933 Tested at CFS Upavon 11.6.17 to 22.7.17; Exp Stn Orfordness, HD Patrol 22.8.17; HD Patrol from Rochford 29.9.17; AP Hendon by April 1918; Hendon 9.4.18; Orfordness 12.4.18; Hendon 1918; RAE Farnborough 21.6.18 last mention 18.3.19 (Petrol system tests)

Info found in The Martinsyde File by Ray Sanger


Ian Pearson


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