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Curtiss BF2C-1 / F11C-3 / Hawk III / Hawk IV

 

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The fourth production F11C-2 Goshawk was completed with manually-operated retractable main undercarriage members accommodated by a deepened forward fuselage. It was powered by an R-1820-80 Cyclone rated at 700hp at 2440m, and was delivered to the US Navy on 27 May 1933 as the XF11C-3. Twenty-seven production models were ordered as F11C-3s with raised aft turtle decks, partial canopies and the metal wings that had proved satisfactory on the XF11C-1. Prior to the commencement of deliveries on 7 October 1934, the designation was changed to BF2C-1. The BF2C-1 carried an armament of two 7.62mm Brownings and made provision for a single 215kg bomb or up to four 53kg bombs. An R-1820-04 Cyclone rated at 770hp for takeoff was fitted. At cruising rpm the Cyclone set up a sympathetic vibration with the metal wing structure, the aircraft shaking dramatically in this regime, and, the problem never being satisfactorily resolved, the BF2C-1s were withdrawn within a few months.

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Hawk III


The export version of the BF2C-1, the Hawk III, differed from the US Navy fighter-bomber in reverting to the wooden wing structure of the F11C-2 (spruce beams with plywood webs and spruce ribs) and in having a Wright SR-1820F-53 Cyclone offering 785hp for take-off and 745hp at 2925m. Gun armament comprised two synchronised 7.62mm weapons. The first export of the Hawk III was a single example to Turkey delivered in April 1935, supply of 24 to Thailand following from August 1935.
In early 1935 an order was placed by Thailand for 24 Hawk III and a manufacturing licence was also purchased. The first 12 were shipped in August and the remaining 12 in late 1935. They were locally designated ‘fighter Type 10’.
In March 1936, the first of a total of 102 Hawk IIIs was delivered to China, 90 of these being assembled by the Central Aircraft Manufacturing Company (CAMCO) at Hangchow. One other purchaser of the Hawk III was Argentina, which took delivery of 10 from May 1936. Argentina also purchased the sole example of the Hawk IV in July 1936, this using a Hawk III airframe with a full sliding cockpit canopy, carburettor heating and an exhaust collector ring for the SR-1820F-56 Cyclone, which delivered its maximum 745hp at 3810m. The Hawk IV attained 399km/h at 3810m and 390km/h at 5000m.

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Hawk IV


BF2C-1 / F11C-3

Engine: Wright R-1820-80 Cyclone, 700hp at 2440m
Take-off weight: 2066 kg
Empty weight: 1529 kg / 3371 lb
Wingspan: 9.60 m / 31 ft 6 in
Length: 7.01 m / 22 ft 12 in
Height: 3.30 m / 10 ft 10 in
Wing area: 24.34 sq.m / 261.99 sq ft
Max. speed: 362 km/h / 225 mph
Range: 917 km / 570 miles

Hawk III

Engine: Wright SR-1820F-56 Cyclone, 745hp at 3810m
Take-off weight: 1958 kg
Empty weight: 1457 kg / 3212 lb
Wingspan: 9.60 m / 31 ft 6 in
Length: 7.14 m / 23 ft 5 in
Height: 2.98 m / 9 ft 9 in
Wing area: 24.34 sq.m / 261.99 sq ft
Max. speed: 325 km/h / 202 mph
Range: 925 km / 575 miles

Hawk IV

Engine: Wright SR-1820F-56 Cyclone, 745hp at 3810m
Wingspan: 9.60 m / 31 ft 6 in
Length: 7.14 m / 23 ft 5 in
Height: 2.98 m / 9 ft 9 in
Wing area: 24.34 sq.m / 261.99 sq ft
Max speed 3810m: 399km/h
Max speed 5000m: 390km/h

 


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