page_title: Grumman JF Duck
section_title: Variants
hierarchical_section_title: Grumman JF Duck / Variants
caption_attribution_description: English: A U.S. Navy Grumman JF-1 Duck that was in service with the NACA at Langley during the summer of 1934. The JF-1 was notably different from the later J2F Duck in that the JF-1 had a shorter central float. The NACA used the JF-1 in part as a propeller testbed aircraft.
context_page_description: The Grumman JF "Duck" was an American single-engine amphibious biplane built by Grumman for the United States Navy during the 1930s. The J2F Duck was an improved version of the JF, with its main difference being a longer float.
context_section_description: XJF-1
  Prototype with 700 hp Pratt & Whitney R-1535-62 engine, one built (BuNo 9218).
  JF-1
  Production variant with 700 hp Pratt & Whitney R-1830-62 Twin Wasp engine, 27 built (BuNos 9434-9455, 9523-9527).
  JF-2
  Variant for the United States Coast Guard powered by a 750 hp Wright R-1820-102 Cyclone engine, 15 built (BuNo 0266, 00371-00372, 01647, USCG V141-V155).
  JF-3
  JF-2 for the U.S. Navy, five built (BuNos 9835-9839).
  Grumman G-20
  Armed version of the Grumman JF-2 for export to Argentina. Eight built.
caption: Grumman JF-1 Duck at Langley
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