Originally designed for land-based use, theModel 34C was virtually identical to theP-1 Hawk inUnited States Army Air Corps service. TheUnited States Navy ordered nine, but starting with the sixth example, they were strengthened forcarrier-borne operations and redesignatedModel 34D. Flown from the carriersLangley andLexington from 1927–30, most of the later variants passed toMarine fighter-bomber units, while a few were flown for a time as twin-floatfloatplanes.
F6C-6Model 34E modified for racing, with itsradiator located inside thefuselage.
XF6C-6Model 34E theF6C-6 which had won the 1930Curtiss Marine Trophy was converted to parasol-wingmonoplane configuration and given wing surface radiators; after achieving the fastest lap in the 1930Thompson Trophy race the XF6C-6 crashed when its pilot was overcome by fumes.[1]
XF6C-7Model 34H testbed for an experimental 350 hp (260 kW)Ranger SGV-770C-1 air-cooled inverted Vee engine.
