The Grumman OA-12 Duck was a post war U.S. Air Force air-sea rescue version of the Grumman J2F-6 amphibian which had been used extensively by the US Navy, Marine Corps and Coast Guard from 1936 until after the end of WW2. The Grumman OA-12 Duck was normally crewed by just a pilot and observer although there was space for a dedicated radio operator if required, more importantly, for it's primary air-sea rescue role, the fuselage cabin had space to accommodate several passengers or even a stretcher-borne casualty. The Grumman Duck was a very versatile aircraft and could still be used as a maritime observation platform or even used offensively by the fitting of optional under-wing racks for bombs or depth-charges. Grumman J2F-6 Duck Specifications: Crew: Pilot and observer and sometimes a radio operator Passenger capacity: two rescued airmen Length: 34 ft 0 in (10.37 m) Wingspan: 39 ft 0 in (11.9 m) Height: 13 ft 11 in (4.25 m) Empty weight: 5,480 lb (2,485 kg) Loaded weight: 7,700 lb (3,496 kg) Engine: Single 900 hp (670 kW) Wright R-1820-54 nine-cylinder radial engine Maximum speed: 190 mph (304 km/h) Cruise speed: 155 mph (248 km/h) Stall speed: 70 mph (112 km/h) Range: 780 mi (1,255 km) Service ceiling: 20,000 ft (6,100 m)
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