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Grumman F7F Tigercat Carrier-Borne Nightfighter / Fighter Aircraft (1944)

Authored By Staff Writer | Last Updated: 8/5/2013

Despite missing combat action in World War 2, the F7F Tigercat served with the USMC in the upcoming Korean War.

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The F7F Tigercat was another carrier-borne aircraft development in Grumman's long line of "cat" named fighters. The system was originally designed as a twin-engine fighter for use off of the decks of US Navy Midway-class aircraft carriers. Unfortunately, the aircraft proved too fast and too large for these vessels (in both operation and storage) and therefore went on to be utilized as a land-based attack fighter by the United States Marine Corps instead. The Tigercat arrived too late to see operational use in World War 2 but saw combat service in the upcoming Korean War. The F7F's design earned some historical distinction in becoming the world's first purpose-designed twin-engine, carrier-based fighter produced in quantity with a tricycle landing gear arrangement. The Tigercat also became the US Navy's first accepted twin-engine fighter.

Grumman had already proven itself a capable aviation firm with carrier-based fighter products spanning as far back as the early 1930's. The F4F Wildcat proved a pivotal Allied stalwart in the early and middle stages of the Pacific Theater, in both defensive and offensive roles. The much improved F6F Hellcat - featuring the powerful Pratt & Whitney "Double Wasp" radial piston engine - ratcheted the bar up a few notches and helped to win back air superiority for the Allies for the remainder of the war. It becomes no surprise then that the same bureau that produced these two excellent aircraft would leave no stone unturned when creating a successor in the "cat" family line. With development beginning as early as 1941, Grumman engineers would set out to create the ultimate form of carrier-based fighter aircraft anywhere in the world. To make this ultimate vision a reality, Grumman engineers would stay with the proven Hellcat powerplant - the Pratt & Whitney brand R-2800 series Double Wasp engine - the same engine that would power what could be considered the pinnacle of American piston-powered flight in the upcoming Grumman F8F Bearcat navy fighter.

This resulting Grumman design emerged as a large, twin-engine, single-seat fighter. First flight of the first of two XF7F-1 prototype occurred in December 1943. Though an excellent and capable aircraft, it was already proving to be too large for the Midway-class of aircraft carriers and the power supplied by the twin Double Wasp engines made it simply too fast for general carrier operations where the Midway-class was concerned. Additionally, the Tigercat performed poorly when running on a single engine and issues arose with the arrestor hook during trials.

As such, the F7F Tigercat would initially have to be relegated to operations from land-bases despite its carrier pedigree. This ultimately led to its selection and primary use by the USMC who ordered 500 of the type even before the prototype's first flight. Production deliveries began in April of 1944. Though the war in Europe and the Pacific was still in full swing by this time, the Tigercat did not gain the usual required operational level of clearance to perform in a combat nature during these closing months of the war. By the time of cessation of hostilities by mid-1945, the Tigercat was all but too late for the big dance. As fate would have it, the aircraft designed and produced during the height of the Second World War would eventually miss the conflict in whole.

The Tigercat was designed as a sleek and fast performer with hard-hitting standard armament. The fuselage was of the smallest possible cross-section and featured a pointed nose assembly, single-seat cockpit and conventional empennage. The pilot was afforded good forward and above visibility though his views left, right and to the rear were limited to an extent. Views left and right were partially obstructed by the radial engine nacelles slung underneath each mid-mounted monoplane wing. The wings themselves were hinged outboard of the engines for ease of storage (hence its carrier-based origins). The tricycle landing gear arrangement was unique, particularly for this class of large fighter. Bell had gained notoriety for using the tricycle arrangement in its P-38 Airacobra series but for the most part, undercarriages were traditionally of the "tail dragging" variety. The F7F's undercarriage arrangement featured two main landing gear systems retracting rearwards into the underside of each engine nacelle. Likewise, the nose-mounted landing gear retracted in this same fashion. All landing struts were afforded a single wheel.

A large airframe made for some large possibilities in terms of armament. Conventional American wisdom throughout the war had been the use of multiple machine guns fitted to the wings. With a high rate of fire and the damage capabilities of such an armament, the choice was an easy one for aircraft manufacturers to make. The Tigercat, however, took this a step further. The Soviets and the Germans had already proven to themselves via real-world experience the value inherent in a cannon-laden fighter aircraft when combating enemy bombers. Though not offering the same high rate-of-fire as their heavy machine gun kin, cannons offered greater lethality per round as a single cannon projectile could pose an exponential threat to an enemy bomber's complex internal systems (particularly the engines) than could a flurry of machine gun fire. A such, the F7F received the best of both worlds, being armed with a battery of 4 x M2 series cannons (mounted in the wingroots, two to a side) and complimented by a collection of 4 x M2 Browning air-cooled, heavy machine guns as standard (fitted to the fuselage underside, two guns to a side - this armament was eventually removed in later versions of the aircraft). This choice of armament provided an already impressive airframe with the power to contend with just about anything available in the skies.


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Specifications for the
Grumman F7F Tigercat
Carrier-Borne Nightfighter / Fighter Aircraft


Focus Model: Grumman F7F-4N Tigercat
Country of Origin: United States
Manufacturer: Grumman - USA
Initial Year of Service: 1944
Production: 365


Crew: 1


Length: 45.28ft (13.8m)
Width: 51.51ft (15.70m)
Height: 16.73ft (5.10m)
Weight (Empty): 16,270lbs (7,380kg)
Weight (MTOW): 25,728lbs (11,670kg)


Powerplant: 2 x Pratt & Whitney R-2800-34W Double Wasp 18-cylinder radial piston engines of 2,100 horsepower each.


Maximum Speed: 460mph (740kmh; 400kts)
Maximum Range: 1,181miles (1,900km)
Service Ceiling: 40,354ft (12,300m; 7.6miles)
Rate-of-Climb: 4,530 feet per minute (1,381m/min)


Hardpoints: 2
Armament Suite:
STANDARD:
4 x 20mm M2 cannons in wingroots, two to a wing.
4 x 12.7mm M2 Browning machine guns in underfuselage position, two to a fuselage side (later removed).

OPTIONAL:
2 x 1,000lb bombs
1 x Torpedo


Variants:
XF7F-1 - Prototype Model Designation; 2 constructed.


F7F-1 - Initial Fighter-Bomber Production Model; fitted with 2 x Pratt & Whitney R-2800-22W radial piston engines; 34 examples produced.

F7F-1N - Dedicated Single-Seat Night-Fighter; fitted with APS-6 radar system.

XF7F-2N - Improved Prototype Night-Fighter Model; single example.

F7F-2N - Dedicated Two-Seat Night-Fighter Model based on XF7F-2N prototype; one fuel tank removed for radar space; 65 examples produced.

F7F-3 - "Improved" Fighter-Bomber Version; fitted with 2 x Pratt & Whitney R-2800-34W radial piston engines; improved higher-altitude performance; enlarged fuel tanks; lengthened tail fin; 189 examples produced.

F7F-3N - Dedicated Two-Seat Night-Fighter based on the F7F-3 production model; lengthened nose assembly for radar system; 60 examples produced.

F7F-3E - Electronic Warfare Aircraft converted from F7F-3 models.

F7F-3P - Photographic Reconnaissance Aircraft converted from F7F-3 models.

F7F-4N - Dedicated Two-Seat Night-Fighter; reinforced throughout with arrestor hook for carrier-based operations; lengthened nose assembly for radar system; 13 examples produced.


Operators:
United States