Grumman J2F Duck

1st Flight 1936

The Grumman J2F Duck (company designation G-15) 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.

Variants

J2F-1

Initial production version with 750 hp R-1820-20 engines.

J2F-2

United States Marine Corps version with nose and dorsal guns and under wing bomb racks.

J2F-2A

As J2F-2 with minor changes for use in the United States Virgin Islands.

J2F-3

J2F-2 but powered by an 850 hp R-1820-26 engine.

J2F-4

J2F-2 but powered by an 850 hp R-1820-30 engine and fitted with target towing equipment.

J2F-5

J2F-2 but powered by a 1,050 hp R-1820-54 engine.

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 under wing bomb racks and provision for target towing gear.

OA-12

Air-sea rescue conversion for the United States Army Air Forces (and later United States Air Force, OA-12A).

Specifications

Crew: 2

Capacity: 2 survivors / passengers

Length: 34 ft 0 in (10.36 m)

Wingspan: 39 ft 0 in (11.89 m)

Height: 13 ft 11 in (4.24 m)

Wing area: 409 sq ft (38.0 m2)

Airfoil: Clark CHY

Empty weight: 5,480 lb (2,486 kg)

Gross weight: 7,700 lb (3,493 kg)

Powerplant: 1 × Wright R-1820-54 Cyclone 9-cylinder air-cooled radial piston engine, 900 hp (670 kW)

Propellers: 3-bladed constant-speed propeller

Performance

Maximum speed: 190 mph (310 km/h, 170 kn)

Cruise speed: 155 mph (249 km/h, 135 kn)

Stall speed: 70 mph (110 km/h, 61 kn)

Range: 780 mi (1,260 km, 680 nmi)

Service ceiling: 20,000 ft (6,100 m)

Armament

Guns: 1 × Browning .30 cal machine gun (7.62 mm) on flexible mount in rear cockpit

Bombs: 650 lb (295 kg) of bombs or depth charges.

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