(Grumman) F7F Tigercat @·AIRCRAFTUBE

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Grumman F7F Tigercat

The Grumman F7F Tigercat was the first twin-engined fighter aircraft 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 They saw service in the Korean War and were withdrawn from service in 1954.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

Based on the earlier Grumman XP-50 that was eventually canceled, the company developed the XP-65 (Model 51) further for a future "convoy fighter" concept. In 1943, work on the XP-65 was terminated in favor of the design that would eventually become the F7F. The contract for the prototype XF7F-1 was signed on 30 June 1941. Grumman's aim was to produce a fighter that outperformed and outgunned 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 Grumman F6F Hellcat at sea level. Capt. Fred M. Trapnell, one of the Navy's premier test pilots, opined that: "It's the best damn fighter I've ever flown." The Grumman F7F was originally named the "Tomcat" but this name was rejected as it was considered too suggestive, at the time. The name would much later be used for the Grumman F-14.

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 arrestor hook design. The initial production series was therefore used only from land bases by the USMC, as night fighters with APS-6 radar. At first, they were single-seat F7F-1N aircraft, but after the 34th production aircraft, a second seat for a radar operator was added; these aircraft 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. 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.

Operational history

Marine Corps night fighter squadron VMF(N)-513 flying F7F-3N Tigercats saw action in the early stages of the Korean War, flying night interdiction and fighter missions and shooting down two Polikarpov Po-2 biplanes. This was the only combat use of the aircraft.

Most F7F-2Ns were modified to control drones for combat training, and these gained bubble canopies over the rear cockpit for the drone controller. An F7F-2D used for pilot transitoning also had a rear sliding, bubble canopy.

In 1945, two Tigercats, serialled TT346 and TT349, were evaluated, but rejected, by the British Royal Navy, preferring a navalized version of the de Havilland Hornet.

Variants

  • XP-65 : Proposed U.S. Army Air Force fighter.
  • XF7F-1 : Prototype aircraft, two built.
  • F7F-1 Tigercat : Twin-engine fighter-bomber aircraft, powered by two Pratt & Whitney R-2800-22W radial piston engines. First production version, 34 built.
  • F7F-1N Tigercat : Single-seat night fighter aircraft, fitted with an APS-6 radar.
  • XF7F-2N : Night-fighter prototype, one built.
  • F7F-2N Tigercat : Two-seat night fighter, 65 built.
  • F7F-2D : Small numbers of F7F-2Ns converted into drone control aircraft. The aircraft were fitted with an F8F Bearcat windshield behind the cockpit.
  • F7F-3 Tigercat : Single-seat fighter-bomber aircraft, powered by two Pratt & Whitney R-2800-34W radial piston engines, 189 built.
  • F7F-3N Tigercat : Two-seat night fighter aircraft, 60 built.
  • F7F-3E Tigercat : Small numbers of F7F-3s were converted into electronic warfare aircraft.
  • F7F-3P Tigercat : Small numbers of F7F-3s were converted into photo-reconnaissance aircraft.
  • F7F-4N Tigercat : Two-seat night-fighter aircraft, fitted with an arrestor hook and other naval equipment, 13 built.

Operators

  • United Kingdom : Royal Navy 2 aircrafts for evaluation only.
  • United States : United States Marine Corps and United States Navy.

Survivors

Beginning in 1949, F7Fs were flown to the then-US Navy storage facility at Naval Air Station Litchfield Park, Arizona. Although the vast majority of the airframes were eventually scrapped, a number of examples were purchased as surplus. The surviving Tigercats were primarily used as water bombers to fight forest fires in the 1960s and 1970s and Sis-Q Flying Services of Santa Rosa, California operated an F7F-3N tanker in this role until retirement in the late 1980s.

Airworthy

F7F-3

  • 80375 - Tigercat N379AK LLC in Bellevue, Washington.
  • 80390 - Lewis Air Legends in San Antonio, Texas.
  • 80411 - Palm Springs Air Museum in Palm Springs, California.
  • 80425 - Avstar Inc. in Seattle, Washington.
  • 80483 - Historic Flight Foundation in Mukilteo, Washington.
  • 80503 - Lewis Air Legends in San Antonio, Texas.
  • 80532 - Merle Maine Enterprises in Ontario, Oregon.

On display

F7F-3

  • 80373 - National Naval Aviation Museum in NAS Pensacola, Florida.
  • 80382 - Planes of Fame Museum in Chino, California.
  • 80410 - Pima Air & Space Museum, adjacent to Davis-Monthan AFB, in Tucson, Arizona.

Under restoration

F7F-3

  • 80374 - to airworthiness by Pissed Away N7629C LCC in Bellevue, Washington.
  • 80404 - in storage at the Fantasy of Flight in Polk City, Florida.

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Source : Article Grumman F7F Tigercat of Wikipedia ( authors )

Specifications (F7F-4N Tigercat)

  • Crew : 2 (pilot, radar operator).
  • Length : 45 ft 4 in (13.8 m).
  • Height : 16 ft 7 in (5.1 m).
  • Wingspan : 51 ft 6 in (15.7 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).
  • Maximum speed : 460 mph (400 kts, 740 km/h).
  • Range : 1,200 mi (1,000 nmi, 1,900 km).
  • Service ceiling : 40,400 ft (12,300 m).
  • Rate of climb : 4,530 ft/min (23 m/s).
  • Powerplant : Two Pratt & Whitney R-2800-34W Double Wasp radial engines.
  • Power : 2,100 hp (1,566 kW) each.
  • Armament :
    • Four 20 mm (0.79 in) M2 cannon.
    • Four 0.50 in (12.7 mm) M2 Browning machine gun.
    • Two 1,000 lb (454 kg) bombs under wings or a torpedo under fuselage.
  • Avionics : AN/APS-19 radar.

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This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Grumman F7F Tigercat of Wikipedia ( authors )
Grumman F7F Tigercat : Your comments on this subject
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