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 weight||2795 kg||6162 lb|
| Empty weight||2302 kg||5075 lb|
| Wingspan||11.37 m||37 ft 4 in|
| Length||8.69 m||29 ft 6 in|
| Height||3.71 m||12 ft 2 in|
| Wing area||21.92 m2||235.94 sq ft|
| Max. speed||531 km/h||330 mph|
| Range||966 km||600 miles|
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