page_title: Grumman J2F Duck
section_title: Variants
hierarchical_section_title: Grumman J2F Duck / Variants
context_page_description: The Grumman J2F Duck is an American single-engine amphibious biplane. It was used by each major branch of the U.S. armed forces from the mid-1930s until just after World War II, primarily for utility and air-sea rescue duties. It was also used by the Argentine Navy, who took delivery of their first example in 1937. After the war, J2F Ducks saw service with independent civilian operators, as well as the armed forces of Colombia and Mexico.
  The J2F was an improved version of the earlier JF Duck, the main differences being a longer float and a more-powerful engine.
context_section_description: J2F-1
  Initial production version with 750 hp R-1820-20 engines, 29 built.
  J2F-2
  United States Marine Corps version with nose and dorsal guns and underwing bomb racks, 21 built.
  J2F-2A
  As J2F-2 with minor changes for use in the United States Virgin Islands, nine built.
  J2F-3
  J2F-2 but powered by an 850 hp R-1820-26 engine, 20 built.
  J2F-4
  J2F-2 but powered by an 850 hp R-1820-30 engine and fitted with target towing equipment, 32 built.
  J2F-5
  J2F-2 but powered by a 1,050 hp R-1820-54 engine, 144 built.
  J2F-6
  Columbia Aircraft built version of the J2F-5 with a 1,050 hp R-1820-64 engine in a long-chord cowling, fitted with underwing bomb racks and provision for target towing gear; 330 built.
  OA-12
  Air-sea rescue conversion for the United States Army Air Forces (and later United States Air Force, OA-12A).
caption: OA-12 in USAF markings (this aircraft was a J2F-6 painted to resemble an OA-12A, at the USAF Museum in Dayton, Ohio).
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