as an observation/bomber. The F8C-4 Helldiver variant initially saw service with the Navy, and the first production batch of 25 was transferred in 1931 to the Marine Corps. A total of 34 F8Cs redesignated as O2C-1 observation aircraft were also transferred to the Naval Reserve in 1931, serving with squadrons VN-10RD9, VN-11RD9, and VN-12RD9. Most of the 63 newer F8C-5/O2C-1 Helldivers also served with the Marines, remaining in service until 1936. The type was featured in multiple Hollywood films: Flight (1929), Hell Divers (1932) and King Kong (1933). Curtiss Falcon aircraft fought during the Brazil Constitutionalist Revolution of 1932, under the flag of São Paulo. In Bolivia, the aircraft type also fought in the Chaco War (1932–1935), bombing Paraguayan troopers. The Colombian Air Force used Falcon F-8 and O-1 in the Colombia-Peru War in 1932–3. Variants U.S. Army Air Corps A-3 Model 44, attack aircraft version of O-1B, armed with two 0.30 in (7.62 mm) machine guns and 200 lb (91 kg) of bombs; 66 built for the USAAC. A-3A Six A-3s converted into trainers. A-3B Model 37H, attack version of O-1E, with six machine guns, including two mounted in wings; 78 built. XA-4 One A-3 with a Pratt & Whitney R-1340-1 Wasp radial piston engine. Scrapped in March 1932, but the design was the basis for the naval variants. A-5 Proposed A-3 variant with Curtiss V-1570 Conqueror engine A-6 Proposed A-3 variant with Curtiss H-1640 Chieftain engine XBT-4 Model 46, one O-1E converted into a basic trainer for the USAAC. XO-1Liberty 12A powered Prototype, later modified to use a Packard 1A-1500, one built. O-1 Model 37A, two-seat observation aircraft, the first production model, ten built. One converted into the O-1 Special VIP transport. O-1A Two-seat observation aircraft, powered by the Liberty piston engine, one built. O-1B Model 37B, first major production version, powered by Curtiss D-12D (V-1150-3) engine; 45 ordered, 25 built and 20 diverted on the production line to the A-3. O-1C Four O-1Bs converted into VIP transports. O-1E Model 37I, variant powered by Curtiss D-12E (V-1150-5) piston engine; 41 built. O-1F Model 37J, one O-1E converted into VIP transport. O-1G Model 38, final O-1 variant, powered by a Wright R-1820F-2 Cyclone engine; 30 built for USAAC. XO-11 Two O-1 modified as O-11 prototypes. O-11 O-1 airframe powered by the Liberty V-1650 piston engine; 67 built concurrently with the O-1s. XO-12 One XO-11 prototype redesignated XO-12. XO-13 O-1