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Grumman F7F Tigercat

(Redirected from Grumman G-51)
"Tigercat" redirects here. For other uses, see Tigercat (disambiguation).

The Grumman F7F Tigercat is a heavy fighter aircraft that served with the United States Navy (USN) and United States Marine Corps (USMC) from late in World War II until 1954. It was the first twin-engine fighter to be deployed by the USN. While the Tigercat was delivered too late to see combat in World War II, it did serve in reconnaissance roles. The Tigercat primarily saw action as a night fighter and attack aircraft during the Korean War.

F7F Tigercat
An F7F-3P preserved in United States Marine Corps markings in flight
General information
TypeHeavy fighter
National originUnited States
ManufacturerGrumman
Primary usersUnited States Navy
Number built364
History
Manufactured1943–1946
Introduction date1944
First flight2 November 1943
Retired1954
Developed intoGrumman XTSF

Designed initially for service on Midway-class aircraft carriers, early production F7Fs were land-based variants. The type was too large to operate from older and smaller carriers, and only a late variant (F7F-4N) was certified for carrier service.

Design and development

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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.[1] 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.[2]

 
An F7F-3N of VMF(N)-513 at Wonsan, Korea, in 1952.

Performance of the prototype and initial production aircraft met expectations; the F7F was one of the fastest piston-engine fighters, with a top speed significantly greater than single-engine USN aircraft — 71 mph faster than a Grumman F6F Hellcat at sea level.[3] Captain Fred Trapnell, one of the premier USN test pilots of the era, stated: "It's the best damn fighter I've ever flown."[4] The F7F was to be heavily-armed — four 20 mm cannon and four 50 caliber (0.50 in; 12.7 mm) machine guns, as well as underwing and under-fuselage hardpoints for bombs and torpedoes. This speed and firepower 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 tailhook design.[5] The initial production series was, therefore, used only from land bases by the USMC, as night fighters with APS-6 radar.[6]

While the F7F was initially also known as the Grumman Tomcat, this name was abandoned, because it was considered at the time to have excessively sexual overtones;[7] (from the 1970s, the name Tomcat became commonly associated with, and officially used by the Navy for, another Grumman design, the F-14 twin-jet carrier-based interceptor). The first production variant was the single-seat F7F-1N aircraft; after the 34th production aircraft, a second seat for a radar operator was added and these aircraft were designated F7F-2N.

A second production version, 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 as well. F7F-3 aircraft were produced in day fighter, night fighter, and photo-reconnaissance versions.[8]

The final production version, the F7F-4N, was extensively rebuilt for additional strength and stability, and did pass carrier qualification, but only 12 were built.[8]

Operational history

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The F7F Tigercat was produced too late to serve in its intended role in WWII; however, early F7F-1 models saw service in the Pacific Theatre before the end of the war. One Marine Corps photographic reconnaissance squadron equipped with the F7F, VMP-354, arrived in Guam in June 1945, and was quickly transferred to Yontan Airfield in Okinawa in July 1945.[9] In July and August 1945, VMP-354 used the F7F to photograph potential invasion beaches for Operation Downfall in Southern Kyushu.[9]

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.[10] 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 transitioning also had a rear sliding, bubble canopy.[11]

In 1945, two Tigercats, serial numbers TT346 and TT349, were evaluated, but rejected by the British Royal Navy in favour of a naval version of the de Havilland Hornet.[12]

Variants

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The second XF7F-1 in 1946.
 
An F7F-2D drone controller with an additional F8F windshield.
 
An F7F-3N night fighter of VMF(N)-513 in April 1950.
XP-65
Proposed United States Army Air Forces pursuit 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 a Grumman 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 and featuring an enlarged tailfin for improved stability at high altitudes, 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 a tailhook and other naval equipment, 12 built.

Operators

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  United States

Surviving aircraft

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The Tigercat was designed to have a very small frontal area.
 
F7F-3N Tigercat in use with belly tank in the fire-fighting role in 1988
 
F7F Tigercat N747MX La Patrona at 2014 Reno Air Races

Beginning in 1949, F7Fs were flown to the then-U.S. Navy storage facility at Naval Air Station Litchfield Park, Arizona.[13] 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 wildfires 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
On display
F7F-3
Under restoration or in storage
F7F-3

Specifications (F7F-4N Tigercat)

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3-view drawing of a Grumman F7F-3N Tigercat

Data from Jane's Fighting Aircraft of World War II[31]

General characteristics

  • Crew: 2
  • Length: 45 ft 4 in (13.82 m)
  • Wingspan: 51 ft 6 in (15.70 m)
  • Height: 16 ft 7 in (5.05 m)
  • Wing area: 455 sq ft (42.3 m2)
  • Airfoil: root: NACA 23015; tip: NACA 23012[32]
  • Empty weight: 16,270 lb (7,380 kg)
  • Max takeoff weight: 25,720 lb (11,666 kg)
  • Powerplant: 2 × Pratt & Whitney R-2800-34W Double Wasp 18-cylinder air-cooled radial piston engines, 2,100 hp (1,600 kW) each
  • Propellers: 3-bladed constant-speed fully-feathering propellers

Performance

  • Maximum speed: 460 mph (740 km/h, 400 kn)
  • Range: 1,200 mi (1,900 km, 1,000 nmi)
  • Service ceiling: 40,400 ft (12,300 m)
  • Rate of climb: 4,530 ft/min (23.0 m/s)

Armament

  • Guns:
    • 4 × 20 mm (0.79 in) AN/M3 cannon (200 rpg, wing roots)
    • 4 × 0.50 in (12.7 mm) M2 Browning machine gun (400 rpg, in nose) (normal fighter versions only; replaced by radar unit in the -3N nightfighter)
  • Bombs:
    • 2 × 1,000 lb (454 kg) bombs, or
    • 8 x 127mm unguided rockets under wings and
    • 1 x 150 gallon fuel or napalm tank under fuselage, or
    • 1 × torpedo under fuselage (day fighter only)

Avionics

  • AN/APS-19 radar

See also

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Related development

Aircraft of comparable role, configuration, and era

Related lists

References

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Notes
  1. ^ Dorr and Donald 1990, p. 119.
  2. ^ Thruelsen 1976, p. 204.
  3. ^ Meyer 2002, p. 51.
  4. ^ Meyer 2002, p. 54.
  5. ^ Meyer 2002, p. 55.
  6. ^ Thruelsen 1976, p. 205.
  7. ^ Meyer 2002, p. 50
  8. ^ a b Taylor 1969, p. 504.
  9. ^ a b O'Brien, J. T. (2004). Top secret: an informal history of electronic warfare & photographic reconnaissance in Marine Corps aviation 1940-2000 (1st ed.). Anaheim, Calif: Equidata Pub. Co. pp. 64–69. ISBN 978-0-9714185-3-0.
  10. ^ Grossnick and Armstrong 1997
  11. ^ Gault 1973, p. 25.
  12. ^ Zuk 2004, p. 129.
  13. ^ Legg 1991, p. 26.
  14. ^ "FAA Registry: N7629C". FAA.gov. Retrieved: 15 July 2021.
  15. ^ "Grumman F7F Tigercat/Bu. 80374." Grumman F7F Tigercat. Retrieved: 14 July 2021.
  16. ^ "FAA Registry: N379AK". FAA.gov. Retrieved: 15 July 2021.
  17. ^ "Grumman F7F Tigercat/Bu. 80375." Grumman F7F Tigercat. Retrieved: 14 July 2021.
  18. ^ "FAA Registry: N700F". FAA.gov. Retrieved: 15 July 2021.
  19. ^ "Grumman F7F Tigercat/Bu. 80390". Lewis Air Legends. Retrieved: 13 January 2020.
  20. ^ "FAA Registry: N207F." FAA.gov. Retrieved: 15 July 2021.
  21. ^ "Grumman F7F Tigercat/Bu. 80411" Archived 2012-03-17 at the Wayback Machine. Palm Springs Air Museum. Retrieved: 23 February 2014.
  22. ^ "FAA Registry: N909TC". FAA.gov. Retrieved: 15 July 2021.
  23. ^ "FAA Registry: N6178C". FAA.gov. Retrieved: 15 July 2021.
  24. ^ "FAA Registry: N747MX". FAA.gov. Retrieved: 15 July 2021.
  25. ^ "Grumman F7F Tigercat/Bu. 80503". Lewis Air Legends. Retrieved: 13 January 2020.
  26. ^ "FAA Registry: N7195C". FAA.gov. Retrieved: 15 July 2021.
  27. ^ "Grumman F7F Tigercat/Bu. 80373". National Naval Aviation Museum. Retrieved: 23 March 2020.
  28. ^ "Grumman F7F Tigercat/Bu. 80382". Planes of Fame Museum. Retrieved: 23 March 2020.
  29. ^ "Grumman F7F Tigercat/Bu. 80410". Pima Air & Space Museum. Retrieved: 23 March 2020.
  30. ^ "FAA Registry: N7626C". FAA.gov. Retrieved: 15 July 2021.
  31. ^ Bridgman 1946, p. 233.
  32. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
Bibliography
  • Bridgman, Leonard (ed.). "The Grumman Tigercat." Jane's Fighting Aircraft of World War II. London: Studio, 1946. ISBN 1-85170-493-0.
  • Carlson, Ted. "Semper Fi Tigercat". Flight Journal, Volume 13, Issue 2, April 2008.
  • Carr, Orrin I. "Fire 'Cat!" Air Classics, Vol. 12, No. 9, Sept. 1976. Canoga Park, CA: Challenge Publications, pp. 38–47.
  • Dorr, Robert F. and David Donald. Fighters of the United States Air Force. London: Temple, 1990. ISBN 0-600-55094-X.
  • Gault, Owen. "Grumman's Tiger Twins: The Skyrocket & Tigercat". Air Classics, Vol. 9, No. 8, Aug. 1973. Canoga Park, CA: Challenge Publications, pp. 22–27.
  • Green, William. "Grumman F7F-1 – F7F-3 Tigercat". War Planes of the Second World War, Volume Four: Fighters London: Macdonald & Co.(Publishers) Ltd., 1961, pp. 106–108. ISBN 0-356-01448-7.
  • Green, William and Gordon Swanborough. "Grumman F7F Tigercat". WW2 Fact Files: US Navy and Marine Corps Fighters. London: Macdonald and Jane's Publishers Ltd., 1976, pp. 57–61. ISBN 0-356-08222-9.
  • Grossnick, Roy A. and William J. Armstrong. United States Naval Aviation: 1910–1995. Annapolis, MA: Naval Historical Center, 1997. ISBN 0-16-049124-X.
  • Legg, David. "Tigercat on camera". Aircraft Illustrated, Volume 24, no. 1, January 1991.
  • Meyer, Corwin ("Corky") H. "F7F Tigercat: The Untold Story". Flight Journal, August 2002. Ridgefield, CT: AirAge Publications. pp. 48–56, 58.
  • Morgan, Eric B. "Grumman F7F Tigercat F.7/30". Twentyfirst Profile, Volume 1, No. 11. New Milton, Hants, UK: 21st Profile Ltd. ISSN 0961-8120.
  • Morgan, Eric B. "The Grumman Twins". Twentyfirst Profile, Volume 2, No. 15. New Milton, Hants, UK: 21st Profile Ltd. ISSN 0961-8120.
  • O'Leary, Michael. "Tigercat Restoration". Air Classics, Vol. 38, No. 11, Nov. 2002. Canoga Park, CA: Challenge Publications.
  • O'Leary, Michael. United States Naval Fighters of World War II in Action. Poole, Dorset, UK: Blandford Press, 1980. ISBN 0-7137-0956-1.
  • Taylor, John W.R. "Grumman F7F Tigercat". Combat Aircraft of the World from 1909 to the Present. New York: G.P. Putnam's Sons, 1969. ISBN 0-425-03633-2.
  • Thruelsen, Richard. The Grumman Story. New York: Praeger Publishers, Inc., 1976. ISBN 0-275-54260-2.
  • Zuk, Bill. Janusz Zurakowski: Legends in the Sky. St. Catharine's, Ontario: Vanwell, 2004. ISBN 1-55125-083-7.
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