The Curtiss Model 75 bụ a onwe oru ngo site na ụlọ ọrụ, e mere site na mbụ Northrop Aircraft Company engineer Don R. Berlin. The mbụ prototype, wuru na 1934, ẹkenịmde niile-metal ewu na ákwà-kpuchie akara elu, a Wright XR-1670-5 radial engine na-emepe emepe 900 HP (670 kW), na typical United States Army Air Corps armament nke otu.30 na (7.62 mm) na otu.50 na (12.7 mm) egbe egbe na-agba site na propeller aak.
Afọ 1934