The PA-1 ("Pursuit, Air-cooled" designation used only this one time) was a single-bay equi-span staggered biplane, the wings employing an unusually thick aerofoil and the center section of the upper wing being thickened to accommodate the fuel tank. Armament comprised two 0.30 in (7.62 mm) Vickers machineguns and power was provided by a Wright R-1 (R-1454) nine-cylinder radial rated at 350 hp.
A contract was placed for two prototype PA-1s (serials 64248, 64249), however, the second was cancelled, while 64248 went to McCook Field under the Project Number P-244.
Span: 28 ft 0 in (8,53 m)
Length: 19 ft 9 in (6,02 m)
Height: 8 ft 8 in (2,64 m)
Wing area: 283 sq ft (26,29 sq.m)
Empty weight: 1,536 lb (697 kg)
Loaded weight: 2,463 lb (1,117 kg)
Max speed: 130 mph (209 kmh) at sea level
Climb: to 6,500 ft (1,980 m) 7 min."