|Grumman JF-2 Duck in United States Coast Guard service.|
|First flight||24 April 1933 (XJF-1 prototype)|
|Primary users||United States Navy|
United States Coast Guard
United States Marine Corps
|Variants||Grumman J2F Duck|
The Grumman JF "Duck" was a single-engine amphibious biplane.
Design and development[edit | edit source]
The Grumman JF Duck was manufactured from 1934 until 1936, when production switched to the J2F Duck and later variants. The more obvious external appearance clue to distinguish a JF from an early J2F is the deletion of the inter-aileron strut between the wings on the J2F; less noticeable perhaps is the J2F's slightly longer rear fuselage/float joining fillet beneath the tail.
The Duck's main pontoon was part of the fuselage, almost making it a flying boat, though it appears more like a standard aircraft with an added float. This general configuration was shared with the earlier Loening OL. The XJF-1 prototype first flew on 24 April 1933 piloted by Grumman test pilot Paul Hovgard.
Operational history[edit | edit source]
The JF-1 that was first ordered, had the same Pratt & Whitney R-1830-62 engine as the XJF-1 prototype. The US Navy ordered 27 JF-1s with the first Ducks delivered beginning in May 1934 to Norfolk NAS. These early production series had provisions for mounting a machine gun at the rear seat facing aft, a single bomb rack mounted under each wing, capable of carrying a 100 lb (45.4 kg) bomb or depth charge on each. The main float was also a Grumman design (Grumman Model "A") and like the prototype, it included retractable main landing gear, making the Duck a true amphibian. Ducks served as general/utility amphibians for photographic, target-towing, scouting and rescue work.
Variants[edit | edit source]
- Prototype with 700 hp Pratt & Whitney R-1535-62 engine, one built (BuNo 9218).
- Production variant with 700 hp Pratt & Whitney R-1830-62 Twin Wasp engine, 27 built (BuNos 9434-9455, 9523-9527).
- 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-2 for the U.S. Navy, five built (BuNos 9835-9839).
- Grumman G-20
- Civilian version of the Grumman JF-2
Operators[edit | edit source]
- Argentine Navy - Operated eight JF-2s
Specifications (JF)[edit | edit source]
Data from 
- Crew: 3
- Capacity: 851 lb (386 kg) payload
- Length: 32 ft 7 in (9.93 m)
- JF-1 & JF-3: 33 ft (10 m)
- Wingspan: 39 ft 0 in (11.89 m)
- Height: 15 ft 1 in (4.60 m)
- Powerplant: 1 × Pratt & Whitney R-1830 Twin Wasp 14-cyl two row air-cooled radial piston engine, 700 hp (520 kW)
See also[edit | edit source]
References[edit | edit source]
- Allen, Francis J. "A Duck Without Feathers". Air Enthusiast, Issue 23, December 1983—March 1984, pp. 46–55, 77—78. Bromley, Kent UK: Pilot Press, 1983.
- Thruelsen, Richard. The Grumman Story. New York: Praeger Publishers, Inc., 1976. ISBN 0-275-54260-2.
- Treadwell, Terry. Ironworks: Grumman's Fighting Aeroplanes. Shrewsbury, UK: Airlife Publishers, 1990. ISBN 1-85310-070-6.
[edit | edit source]
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