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Grumman J2F Duck


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J2F Duck


Production of this general utility amphibian began in 1933 when the first prototype flew, and production continued until 1945. In all, nine series of the Duck were built.
The first appeared for the Navy in 1933 as the JF-1, powered by a 521.6kW Pratt & Whitney R-1830 Twin Wasp engine. This was followed by the JF-2 Coast Guard version, powered by a 559kW Wright Cyclone radial, and the JF-3. A number of JF-2s were also delivered to Argentina. By the beginning of 1941 about 115 JF and J2F-1 to J2F-4 Ducks were in service as general/utility amphibians for photographic, target-towing, scouting and rescue work.


These were followed by J2F-5s and J2F-6s.


The J2F6 was by far the most common. It featured aerodynamic improvements over the previous models, including a long-cord engine cowling. Only two Ducks are known to be active, though several more are registered. The amphibian was originally used for photography, target-towing, scouting, and rescue work. Although the Duck is normally flown as a two-seater in tandem fashion, a folding floor in the rear cockpit gives access to a lower compartment for use in rescue work and the like; the lower compartment could house either two extra crew members or a stretcher.


Some models of the Duck were powered by the 725-hp Wright Cyclone engine.


The J2F-6 was produced in 1944 by the Columbia Aircraft Corporation of Valley Stream, Long Island, under licence from Grumman, bringing the total number of JF/J2Fs built to over 600.

Engine: 1 x Wright R-1820-54, 660kW
Max take-off weight: 2400-3500 kg / 5291 - 7716 lb
Empty weight: 1860 kg / 4101 lb
Wingspan: 11.9 m / 39 ft 1 in
Length: 10.4 m / 34 ft 1 in
Height: 4.3 m / 14 ft 1 in
Wing area: 37.5 sq.m / 403.65 sq ft
Max. speed: 250 km/h / 155 mph
Cruise speed: 200 km/h / 124 mph
Ceiling: 7100 m / 23300 ft
Range w/max.fuel: 600 km / 373 miles
Range w/max. payload: 400 km / 249 miles
Armament: 3 machine-guns, 100-150kg of bombs
Crew: 2

Grumman JF / J2F-6 Duck

Engine : Wright R-1820-54 Cyclone 9, 900 hp
Length : 33.99 ft / 10.36 m
Height: 13.911 ft / 4.24 m
Wingspan : 39.009 ft / 11.89 m
Wing area : 409.032 sqft / 38.0 sq.m
Max take off weight : 7702.1 lb / 3493.0 kg
Weight empty : 4401.2 lb / 1996.0 kg
Max. speed : 165 kts / 306 km/h
Cruising speed : 134 kts / 249 km/h
Service ceiling : 25000 ft / 7620 m
Wing load : 18.86 lb/sq.ft / 92.0 kg/sq.m
Range : 652 nm / 1207 km

 

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