Sopwith 2FR.2 Bulldog
1917
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  FIGHTER, RECONNAISSANCEVirtual Aircraft Museum / United Kingdom / Sopwith  

Sopwith 2FR.2 Bulldog

A fighter-reconnaissance two-seater, the Bulldog was a compact aircraft which, in its initial form as first flown late 1917, was a single-bay staggered biplane with a 200hp Clerget llEb 11-cylinder rotary engine and an armament of two synchronised and two pillar-mounted 7.7mm machine guns. The Bulldog proved heavier than projected and difficult to control, and in an attempt to improve handling qualities it was fitted with two-bay wings with balanced ailerons, flight test being resumed in March 1918. With the balanced ailerons replaced by plain surfaces, the Bulldog was submitted to Martlesham Heath for official trials on 22 April 1918. There it was found to handle well, but to possess disappointing performance. It was eventually to be reengined with a Bentley B.R.2. The second prototype was completed with an A.B.C. Dragonfly nine-cylinder radial of 320hp, being delivered to the RAE at Farnborough on 25 June 1918 as the Bulldog Mk II and serving as an engine test bed. Work began on a third prototype, but the Bulldog's failure to win official approval led to discontinuation of the programme before this aircraft could be completed.


Specification 
 WEIGHTS
    Take-off weight1132 kg2496 lb
    Empty weight654 kg1442 lb
 DIMENSIONS
    Wingspan10.29 m34 ft 9 in
    Length7.00 m23 ft 12 in
    Height2.67 m9 ft 9 in
    Wing area31.12 m2334.97 sq ft
 PERFORMANCE
    Max. speed175 km/h109 mph

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