Curtiss Hawk 75-R


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Curtiss Hawk 75-R

Completed late in 1938 as a company-owned demonstrator, the Hawk 75-R was essentially similar to the USAAC's P-36A. Its Pratt & Whitney R-1830-19 (SC2-G) Twin Wasp was, however, fitted with a turbo-supercharger mounted beneath the nose, just aft of the engine cowling, with a ventrally-mounted intercooler. Extensively tested by the USAAC, the Hawk 75-R was eventually returned to Curtiss as the turbo-supercharger proved unreliable and the manual monitoring of the unit was considered impracticable in combat. The turbo-supercharger was subsequently removed and the aircraft re-engined with a Cyclone.

  Take-off weight2795 kg6162 lb
  Empty weight2302 kg5075 lb
  Wingspan11.37 m37 ft 4 in
  Length8.69 m29 ft 6 in
  Height3.71 m12 ft 2 in
  Wing area21.92 m2235.94 sq ft
  Max. speed531 km/h330 mph
  Range966 km600 miles

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