Grumman F7F Tigercat gallery

The Grumman F7F Tigercat was the first twin-engined fighter aircraft design to enter service with the United States Navy. Designed for the new Midway-class aircraft carriers, the aircraft were too large to operate from earlier decks. Although delivered to United States Marine Corps (USMC) combat units before the end of World War II, the Tigercat did not see combat service in that war. Most F7Fs ended up in land-based service, as attack aircraft or night fighters; only the later F7F-4N was certified for carrier service. They saw service in the Korean War and were withdrawn from service in 1954.

Design and development

The contract for the prototype XF7F-1 was signed on 30 June 1941. Grumman's aim was to produce a plane that out-performed and out-gunned all existing fighter aircraft, and that had an auxiliary ground attack capability. Armament was heavy: four 20 mm cannons and four 0.50 in (12.7 mm) machine guns, as well as underwing and under-fuselage hardpoints for bombs and torpedoes. Performance met expectations too; the F7F Tigercat was one of the highest-performance piston-engined fighters, with a top speed well in excess of the US Navy's single-engined aircraft—71 mph faster than a F6F Hellcat at sea level. The opinion of Capt. Fred M. Trapnell, one of the Navy's premier test pilots, was that the "It's the best damn fighter I've ever flown."
All this was bought at the cost of heavy weight and a high landing speed, but what caused the aircraft to fail carrier suitability trials was poor directional stability with only one engine operational, as well as problems with the tail-hook design. Therefore, the initial production series was only used from land bases by the USMC, as night fighters with APS-6 radar. At first, they were single-seater F7F-1N aircraft, but after the 34th production aircraft, a second seat for a radar operator was added; these planes were designated F7F-2N.
The next version produced, the F7F-3 was modified to correct the issues that caused the aircraft to fail carrier acceptance and this version was again trialled on the USS Shangri-La (CV-38). A wing failure on a heavy landing caused the failure of this carrier qualification too. F7F-3 aircraft were produced in day fighter, night fighter and photo-reconnaissance versions.
A final version, the F7F-4N, was extensively rebuilt for additional strength and stability, and did pass carrier qualification, but only 12 were built.

General characteristics ( F7F-4N Tigercat )

Crew: 2 (pilot, radar operator)
Length: 45 ft 4 in (13.8 m)
Wingspan: 51 ft 6 in (15.7 m)
Height: 16 ft 7 in (5.1 m)
Wing area: 455 ft² (42.3 m²)
Empty weight: 16,270 lb (7,380 kg)
Max takeoff weight: 25,720 lb (11,670 kg)
Powerplant: 2× Pratt ∧ Whitney R-2800-34W "Double Wasp" radial engines, 2,100 hp (1,600 kW) each

Performance ( F7F-4N Tigercat )

Maximum speed: 400 knots (460 mph, 740 km/h)
Range: 1,200 mi (1,000 nm, 1,900 km)
Service ceiling: 40,400 ft (12,300 m)

Armament ( F7F-4N Tigercat )

Guns
- 4 x 20 mm (0.787 in) M2 cannon
- 4 x 0.50 in (12.7 mm) M2 Browning machine gun
Bombs
- 2 x 1,000 lb (450 kg) bombs under wings or
- 1 x torpedo under fuselage