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F8F Bearcat
Role Fighter aircraft
Manufacturer Grumman
First flight 21 August 1944
Introduction 1945
Retired 1955 (United States Navy)
1960 (Royal Thai Air Force)
Status Retired
Primary users United States Navy
United States Marine Corps
French Air Force
Royal Thai Air Force
Number built 1,266

The Grumman F8F Bearcat (affectionately called "Bear") was an American single-engine naval fighter aircraft of the 1940s. It went on to serve into the mid-20th century in the United States Navy and other air forces, and would be the company's final piston engined fighter aircraft.

Contents

Design and development

Designed for the interceptor fighter role, the design team's aim was to create the smallest, lightest fighter that could fit around the Pratt & Whitney R-2800 engine (carried over from the F6F Hellcat). Compared to its predecessor, the Bearcat was 20% lighter, had a 30% better rate of climb and was 50 mph (80 km/h) faster. It was also considerably smaller in size, as it was designed to be operated from small escort aircraft carriers, something the big Hellcat rarely did. Thus the F8F Bearcat was intended mainly as a replacement for the obsolete F4F Wildcat,[citation needed] still the mainstay fighter of the many wartime escort carriers.

In comparison with the Vought F4U Corsair, the initial Bearcat (F8F-1) was marginally slower but was more maneuverable and climbed more quickly. Its huge 12 ft 4 in Aero Products four-bladed propeller required a long landing gear (made even longer by the mid-fuselage position of the wing), giving the Bearcat an easily-recognized, "nose-up" profile. The hydraulically operated undercarriage used an articulated trunnion which extended the length of the oleo legs to lengthen when down; as the undercarriage retracted the legs were shortened, enabling them to fit into a wheel well which was entirely in the wing. An additional benefit of the inward retracting units was a wide track, which helped counter propeller torque on takeoff and gave the F8F good ground and carrier deck handling.[1]. For the first time in a production Navy fighter, a bubble canopy offered 360° visibility.

The Bearcat concept was inspired by the early 1943 evaluation of a captured Focke-Wulf Fw 190 by Grumman test pilots and engineering staff.[2] After flying the Fw 190, Grumman test pilot Bob Hall wrote a report directed to President Leroy Grumman, who then personally laid out the specifications for Design 58, the successor to the Hellcat. Design 58 closely emulated the design philosophy of the German fighter, although no part of the Fw 190 was copied. The F8F Bearcat stemmed from Design 58 [1] with the primary missions of outperforming highly maneuverable late-model Japanese fighter aircraft such as the A6M5 Zero.[3] A role which later developed was that defending the fleet against incoming airborne suicide (kamikaze) attacks.[4]

An F8F Bearcat aboard the USS Valley Forge (CV-45)

The target loaded weight of 8,750 lb/3,969 kg (derived from the land-based German aircraft) was essentially impossible to achieve as the structure of the new fighter had to be made strong enough for aircraft carrier landings. Structurally the fuselage used flush riveting as well as spot welding, with a heavy gauge 302W aluminum alloy skin.[1] Armor protection was provided for the pilot, engine and oil cooler; weight saving measures include restricting the internal fuel capacity to 160 gal (606 l) [1](later 183)[5] and limiting the fixed armament to four .50 cal Browning M2/AN machine guns, two in each wing.

As a weight-saving concept the designers came up with detachable wingtips; if the g-force exceeded 7.5 g then the tips would be allowed to snap off, leaving a perfectly flyable aircraft still capable of carrier landing. While this worked very well under carefully controlled conditions in flight and on the ground, in the field, where aircraft were repetitively stressed by landing on carriers and since the wings were slightly less carefully made in the factories, there was a possibility that only one wingtip would break away with the possibility of the aircraft crashing.[6] This was replaced with an explosives system to blow the wings off together, which also worked well, however this ended when a ground technician died due to accidental triggering. In the end the wings were reinforced and the aircraft limited to 7.5 g.[7]

Grumman's project pilot for the Bearcat series was legendary test pilot Corky Meyer, who also had this role on the F6F Hellcat, F7F Tigercat, F9F Panther, XF10F-1 Jaguar, and the F11F Tiger series. Meyer was head of Grumman Flight Operations at Edwards Air Force Base from 1952–56.[8][9]

Another famous name is associated with the type; when asked his favorite aircraft to fly, Neil Armstrong's immediate and unequivocal answer was "Bearcat". Armstrong had flown the type in 1950 during his Navy Advanced Training, field qualifying in it at age 19.[10]

Operational history

On 25 August 1946, the Blue Angels transitioned to the Grumman F8F-1 Bearcat and introduced the famous "diamond" formation.

The F8F prototypes were ordered in November 1943 and first flew on 21 August 1944, a mere nine months later. The first production aircraft was delivered in February 1945 and the first squadron was operational by 21 May, but World War II was over before the aircraft saw combat service.

Postwar, the F8F became a major U.S. Navy fighter, equipping 24 fighter squadrons. Often mentioned as one of the best-handling piston-engine fighters ever built, its performance was sufficient to outperform many early jets. Its capability for aerobatic performance is illustrated by its selection for the Navy's elite Blue Angels in 1946, who flew it until the team was temporarily disbanded in 1950 (during the Korean War). The F9F Panther and McDonnell F2H Banshee largely replaced the Bearcat in USN service, as their performance and other advantages eclipsed piston-engine fighters.

An unmodified production F8F-1 set a 1946 time-to-climb record (after a run of 115 ft/35 m) of 10,000 ft (3,048 m) in 94 seconds (6,383 fpm). The Bearcat held this record for ten years until it was broken by a modern jet fighter (which could still not match the Bearcat's short takeoff distance).

Other nations that flew the Bearcat included the French Air Force and Royal Thai Air Force. French aircraft saw combat service against the Viet Minh in the First Indochina War as fighter-bombers in the early 1950s.[11] They were used to support French Forces at the Battle of Dien Bien Phu, operating at the edge of their combat radius, but failed to prevent the French defeat that brought about the end of the war.[12] Nearly 70 surviving aircraft passed to the Vietnam Air Force upon its creation in 1955.[13]

Air racing

F8F-2 Bearcat N5555H, flown by N.R. Hanson (1924–1967), Yale's "Flying Professor", in the 1960s
Record-breaking Rare Bear racer

Bearcats have long been popular in air racing. A stock Bearcat flown by Mira Slovak and sponsored by Bill Stead won the first Reno Air Race in 1964. Rare Bear, a highly-modified F8F owned by Lyle Shelton, went on to dominate the event for decades, often competing with Daryl Greenamyer, another famous racer with victories in his own Bearcat ("Conquest I") and holder of a propeller-driven aircraft world speed record in it. Rare Bear also set many performance records, including the 3 km World Speed Record for piston-driven aircraft (528.33 mph/850.26 km/h), set in 1989), and a new time-to-climb record (3,000 m in 91.9 seconds, set in 1972, breaking the 1946 record cited above).[14][15][16]

Variants

G-58
Company designtion.
G-58A
Two civil aircraft. The first was owned by the Gulf Oil Company for the use of Major Alford Williams, the second one was used by Grumman as a demonstrator aircraft.
XF8F-1
Prototype aircraft, two built.
F8F-1 Bearcat
Single-seat fighter aircraft, equipped with folding wings, a retractable tailwheel, self-sealing fuel tanks, a very small dorsal fin, powered by a 2,100 hp (1,566 kW) Pratt & Whitney R-2800-34W Double Wasp radial piston engine, armed with four 0.50 in (12.7 mm) machine guns.
F8M-1 Bearcat
F8F-1 Bearcats built by General Motors.
F8F-1B Bearcat
Single-seat fighter version, armed with four 20 mm cannons.
F8F-1(D) Bearcat
Export version for France and Thailand.
XF8-1N
Night fighter prototypes, two built.
F8F-1N Bearcat
Night fighter version, equipped with an APS-19 radar.
XF8F-2
F8F-2 prototypes, two built.
F8F-2 Bearcat
Improved version, equipped with a redesigned engine cowling, taller fin and rudder, armed with four 20 mm (.79 in) cannons, powered by a Pratt & Whitney R-2800-30W radial piston engine, 293 built.
F8F-2N Bearcat
Night-fighter version, equipped with an APS-19 radar.
F8F-2P Bearcat
Photo-reconnaissance version, fitted with camera equipment, armed with two 20 mm (.79 in) cannons.
F8F-1D and F8F-2D
Small numbers of F8F-1s and F8F-2s were converted into drone control aircraft.

Operators

 France
 Thailand
 United States
 South Vietnam

Surviving aircraft

Grumman F8F-2P Bearcat G-RUMM N700HL at Flying Legends, Duxford, UK
F8F-2 Bearcat at the Camarillo Airport Museum

A small number of Bearcats survive: approximately 11 are airworthy (several as racing aircraft), eight are restored for static display and approximately a dozen more are wrecks or restoration projects.

Darryl Greenamyer's Bearcat, "Conquest I" can be seen on exhibit at the Smithsonian National Air & Space Museum.

Specifications F8F-1 and F8F-2

F8F-2 Bearcat

Data from Jane's Fighting Aircraft of World War II[17], [3]

General characteristics

  • Crew: 1 pilot
  • Length: 28 ft 3 in (8.61 m)
  • Wingspan: 35 ft 10 in (10.92 m)
  • Height: 13 ft 9 in (4.21 m)
  • Wing area: ft² (m²)
  • Empty weight: 7,070 lb (3,207 kg)
  • Loaded weight: 9,600 lb (4,354 kg)
  • Max takeoff weight: 12,947 lb (5,873 kg)
  • Powerplant:Pratt & Whitney R-2800-34W "Double Wasp" two-row radial engine, 2,100 hp (1,567 kW)

Performance

Armament

  • Guns: 4 × 0.50 in (12.7 mm) machine guns (Four 20mm M3 cannon F8F-1B)
  • Rockets: 4× 5 in (127 mm) unguided rockets
  • Bombs: 1,000 lb (454 kg) bombs

Data from F8F Bearcat in action[18]

General characteristics

  • Length: 28 ft 3 in (8.61 m)
  • Wingspan: 35 ft 10 in (10.92 m)
  • Height: 13 ft 10 in (4.21 m)
  • Empty weight: 7,650 lb (3,207 kg)
  • Loaded weight: 10,200 lb (4,627 kg)
  • Max takeoff weight: 13,460 lb (6,105 kg)

Performance

Armament

  • Guns: 4 × 20 mm (.79 in) M3 cannon
  • Rockets: 4× 5 in (127 mm) unguided rockets
  • Bombs: 1,000 lb (454 kg) bombs

See also

Related development

Comparable aircraft

Related lists

References

Notes
  1. ^ a b c d Scrivner 1990, p. 4.
  2. ^ Meyer 1998, p. 42.
  3. ^ a b Maloney 1969
  4. ^ U.S. Naval Air Museum http://broadcast.illuminatedtech.com/display/story.cfm?bp=92&sid=7974
  5. ^ Scrivner 1990, p.7.
  6. ^ Scrivner 1990, p. 14.
  7. ^ "Clipping the Bearcat's wing" Corwin W Meyer
  8. ^ www.GrummanPark.org—Grumman test pilots
  9. ^ Meyer, Corwin. Corky Meyer's Flight Journal: A Test Pilot's Tales Of Dodging Disasters-Just In Time. North Branch, Minnesota: Specialty Press, 2006. ISBN 1-58007-093-0.
  10. ^ Hanson, James R. First Man: The Life of Neil A. Armstrong. New York: Simon & Schuster, 2005. ISBN 0-74325-751-0.
  11. ^ The war in Indo-China goes on., The News Magazine of the Screen, 12/1953
  12. ^ Manevy 1993, pp. 278–280.
  13. ^ Wings Palette. AVIA Camouflage Profiles. Grumman F8F Bearcat
  14. ^ www.RareBear.com—Lyle Shelton's "Rare Bear" [Note that Shelton's claim to be the "fastest propeller-driven aircraft in the world" does not acknowledge faster turboprop aircraft such as the Russian Tupolev Tu-95 Bear bomber. Other sources credit "Rare Bear" as the fastest piston-driven aircraft.]
  15. ^ www.AeroSpaceWeb.org—aircraft speed records
  16. ^ www.AirRace.com —speed records from archives of the Society of Air Racing Historians
  17. ^ Bridgman 1946, p. 233.
  18. ^ Scrivner, 1990 p.31.
Bibliography
  • Andrews, Hal. The Grumman F8F Bearcat (Aircraft in profile 107). Windsor, Bershire, UK: Profile Publications Ltd., 1972 (reprinted from 1966).
  • Bridgman, Leonard. "The Grumman Bearcat." Jane’s Fighting Aircraft of World War II. London: Studio, 1946. ISBN 1-85170-493-0.
  • Chant, Christopher. Grumman F8F Bearcat: Super Profile. Sparkford, Yeovil, UK: Haynes Publishing, 1985. ISBN 0-85429-447-3.
  • Drendel, Lou. U.S. Navy Carrier Fighters of World War II. Carrollton, TX: Squadron/Signal Publications Inc., 1987. ISBN 0-89747-194-6.
  • Green, William. "Grumman F8F-1 Bearcat". War Planes of the Second World War, Volume Four: Fighters. London: Macdonald & Co. (Publishers) Ltd., 1961, pp. 109–111. ISBN 0-356-01448-7.
  • Green, William and Gordon Swanborough. "Grumman F8F Bearcat". WW2 Fact Files: US Navy and Marine Corps Fighters. London: Macdonald and Jane's Publishers Ltd., 1976, pp. 62–63. ISBN 0-356-08222-9.
  • Maloney, Edward T. Grumman F8F Bearcat (Aero Series Vol. 20). Fallbrook, California: Aero Publishers, 1969. ISBN 0-8168-0576-8.
  • Manevy, Jean Christophe. "French Bearcats in Indo-China 1951-1954". Air International, June 1993, Vol. 44, No. 6. Stamford, UK:Key Publishing. pp. 278–280. ISSN 0306-5634.
  • Meyer, "Corky". "Clipping the Bearcat's Wing." Flight Journal, Vol. 3, no. 4, August 1998.
  • Morgan, Eric B. "Grumman's Hot Rod." Twenty-first Profile, Volume 1, no. 12. New Milton, Hantfordshire, UK: Profile Publications, 1972. ISSN 0961-8120.
  • Morgan, Eric B. "Grumman Bearcat part II." Twenty-first Profile, Volume 2, no. 17. New Milton, Hantfordshire, UK: Profile Publications, 1972. ISSN 0961-8120.
  • O'Leary, Michael. United States Naval Fighters of World War II in Action. Poole, Dorset, UK: Blandford Press, 1980. ISBN 0-7137-0956-1.
  • Scrivner, Charles L. F8F Bearcat in Action, Aircraft number 99. Carrollton, Texas: Squadron/Signal Publications Inc., 1990. ISBN 0-89747-243-8.
  • Taylor, John W.R. "Grumman F8F Bearcat". Combat Aircraft of the World from 1909 to the Present. New York: G.P. Putnam's Sons, 1969. ISBN 0-425-03633-2.

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