F8F Bearcat – Triumph of Piston-Engine Aircraft Design

One of the most iconic figures of post-World War II aviation, the Grumman F8F Bearcat, symbolizes a combination of aesthetics, design, and power that sets it apart.

As one of the last piston-engined fighters developed by Grumman, the Bearcat left an indelible impression on aviation history, demonstrating the pinnacle of piston-engine aircraft design just as the jet age was dawning.


A Brief History of the Cat Family of Aircraft

The F8F Bearcat belongs to the illustrious lineage of Grumman’s ‘Cat’ family of aircraft, a series known for their high performance, durability, and unique design attributes.

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The family began with the FF-1, a biplane introduced in the 1930s, which was soon followed by the single-wing F4F Wildcat, an aircraft renowned for its resilience during the early stages of World War II.

A Royal Navy F4F Martlet with invasion stripes.
The F4F had impressive performance at the time of introduction.

However, it was the F6F Hellcat, produced between 1942 and 1945, which really made the ‘Cat’ series synonymous with American air superiority.

With more than 12,000 units produced and a kill ratio of 19:1 against Japanese aircraft, the Hellcat etched its place in aviation history.

The last of the piston-powered lineage, the F8F Bearcat, would then emerge as the epitome of propeller-driven fighter aircraft, embodying the hard-earned lessons of air warfare during the Second World War.

F6F -5N with the radar pod and 20mm cannons.
The F6F Hellcat played an important part in the Pacific campaign.

The Bearcat

The F8F Bearcat was conceptualised during the height of World War II as a small, lightweight fighter that could outperform any existing combat aircraft.

Engineers, employing a “bigger engine, smaller airframe” approach, focused on increasing climb rate, reducing weight, and improving overall performance.

At its heart was the powerful Pratt & Whitney R-2800 Double Wasp radial engine, capable of generating 2,250 horsepower.

The Pratt & Whitney R-2800 Double Wasp is a two-row, 18-cylinder, air-cooled radial aircraft engine with a displacement of 2,804 cubic inches (46 L), and is considered one of the premier radial piston engines produced in the United States.

R-2800 radial engine.
The R-2800 was used by aircraft like the P-47 and F4U Corsair.

The “R” in its designation stands for “radial,” and “2800” refers to its total cubic inch displacement. The “Double Wasp” name reflects its two rows of nine cylinders each.

The R-2800 was renowned for its superior power-to-weight ratio, reliability, and serviceability.

The engine was designed to operate for extended periods at high power settings, making it an excellent choice for fighter and bomber aircraft.

Its robust construction, featuring forged components and nitrided steel cylinders, made the engine remarkably resilient and capable of withstanding significant battle damage.

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The engine’s initial version could produce 2,000 horsepower, but subsequent improvements, including the introduction of water/methanol injection for combat power and intercoolers to cool the intake charge, meant that later versions could produce over 2,500 horsepower.

Several notable aircraft were powered by the R-2800, including the F8F Bearcat, the F6F Hellcat, the P-47 Thunderbolt, and the A-26 Invader, along with various post-war civilian airliners such as the Douglas DC-6 and the Lockheed Constellation.

More than 125,000 R-2800 engines were built, a testament to their reliability and effectiveness.

Furthermore, the airframe of the Bearcat was designed to be as light and compact as possible without compromising strength.

The bubble canopy was commonplace on later fighters thanks to the improvement in visibility. Photo credit - Airwolfhound CC BY-SA 2.0.
The bubble canopy was commonplace on later fighters thanks to the improvement in visibility. Photo credit – Airwolfhound CC BY-SA 2.0.

To keep the weight down, the aircraft was given shorter, lighter wings, with a higher wing loading than previous Grumman designs.

This gave the Bearcat higher performance but at the cost of a higher landing speed, which was acceptable in a carrier-based aircraft with good low-speed handling.

Another critical design feature was the introduction of a bubble canopy, a first for a U.S. Navy fighter.

This offered the pilot increased visibility, which was crucial in dogfights.

Fuel tanks were also placed in the wingtips, an unusual feature at the time.

This design choice was made to improve roll rate by moving weight away from the centre of the aircraft.

The development process involved rigorous testing and iterations to ensure that the aircraft could fulfil its intended role.

Despite the Bearcat coming late to the Second World War and seeing no combat in that conflict, it proved to be a highly capable aircraft in post-war service.

The Blue Angels display team flew the Bearcat. However in modern times they fly the F/A-18 Hornet.
The Blue Angels display team flew the Bearcat. However, in modern times they fly the F/A-18 Hornet.


The F8F-1 is where it all started. This was the first production version of the Bearcat, a single-seat fighter boasting a powerful 2,100 horsepower R-2800-34W engine.

Equipped with four .50 calibre M2 Browning machine guns and capable of carrying either two 1,000 lb bombs or four rockets, the F8F-1 was a formidable aircraft.

The prototype XF8F-1 Bearcat.
The prototype XF8F-1 Bearcat.

It also had an armoured windscreen and a bulletproof fuel tank, offering additional protection to the pilot during combat operations.

Following the F8F-1, the F8F-1B variant brought a significant change to the Bearcat’s armament.

The .50 calibre machine guns were replaced with four 20mm M3 cannons, offering enhanced firepower to pulverize enemy aircraft and ground targets.

This made the Bearcat even more deadly in the skies.

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The F8F-1N was a special variant designed for night combat operations. It was equipped with an APS-19 radar, housed in a pod under the right wing, which allowed the aircraft to detect and engage targets in low-light conditions.

Its weaponry remained the same as the F8F-1, featuring four .50 calibre machine guns.

The F8F-2 Bearcat offered numerous improvements over the earlier models.

Later variants ditched the M2 .50s in favour of the AN/M3 20mm cannon.
Later variants ditched the M2 .50s in favour of the AN/M3 20mm cannon.

At its core was a more powerful R-2800-30W engine with water injection, which amped up the maximum takeoff power to a whopping 2,250 horsepower.

The aircraft’s vertical tail was also enlarged for improved stability, and the weaponry was upgraded to four 20mm M3 cannons, giving it a significant punch in aerial engagements.

A night-fighter variant of the F8F-2, the F8F-2N was equipped with the same APS-19 radar as the F8F-1N, enabling operations in the dark. It also shared the enlarged vertical tail and powerful cannon armament of the F8F-2.

The F8F-2P was a photo-reconnaissance version of the Bearcat, featuring cameras mounted in the rear fuselage.

An F8F-2P of VC 62 flying over the  USS Midway.
An F8F-2P of VC 62 flying over the USS Midway.

This variant served a crucial role in gathering valuable intelligence from aerial reconnaissance missions, all while retaining the formidable cannons and power enhancements of the F8F-2.

Operational History

The first F8F-1 Bearcats entered service with the U.S. Navy’s VF-19 squadron in May 1945, just a few months before the end of the Second World War.

The aircraft was designed in response to the U.S. Navy’s need for a fighter that could counter advanced Japanese aircraft.

Although it was too late to see combat in World War II, the Bearcat’s impressive performance characteristics demonstrated that it would have been a formidable opponent.

In the post-war period, the F8F became the primary aircraft of many U.S. Navy fighter squadrons.

Despite the rapid advances in jet technology, the Bearcat continued to serve in frontline units until 1952, and in reserve units until 1959.

When the Korean War broke out in 1950, F8F Bearcats were among the forces mobilized.

However, by this time, jet-powered fighters like the F9F Panther were taking centre stage in combat operations, and the Bearcat saw no combat in this conflict.

The Bearcat also saw extensive service with foreign air forces. The French Air Force (Armée de l’Air) used Bearcats in the First Indochina War from 1951 to 1954.

French F8Fs.
French F8Fs.

In these combat operations, the F8F performed ground attack, reconnaissance, and patrol duties.

The aircraft’s power and ruggedness made it well-suited to this challenging conflict.

The type was also used by the Royal Thai Air Force.

Thai Bearcats saw combat during the Laotian Civil War in the early 1960s, and they remained in service until 1968, making Thailand the last country to retire the F8F.

Reno Air Race

Despite the short service life, the Bearcat’s story did not end there.

The aircraft gained a second lease of life in the world of air racing.

F8F Bearcats have been frequent competitors in the Reno Air Races, a pylon racing event held annually in Nevada.

The most notable is “Rare Bear” – a highly modified F8F Bearcat that has earned its fame in the world of air racing.

Owned and operated by the Rare Bear Air Racing Team, this aircraft has been a successful competitor in the Reno Air Races, a prominent pylon racing event held annually in Reno, Nevada.

The “Rare Bear” is not just any F8F Bearcat.

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It has been extensively modified to optimise its performance for air racing.

Many WW2 aircraft are used as racer s in at Reno.
The heavily modified F8F Bearcat ‘Rare Bear’. Photo credit – D Ramey Logan CC BY-SA 4.0.

Among the modifications, the most significant is its engine.

The original Pratt & Whitney R-2800 Double Wasp was replaced with a Wright R-3350 Duplex-Cyclone radial engine, an extremely powerful engine originally developed for large aircraft like the B-29 Superfortress.

This engine, combined with the aerodynamic modifications made to the aircraft, allowed the “Rare Bear” to achieve remarkable speeds.

In 1989, the aircraft set a world speed record for piston-driven aircraft, reaching a speed of 528.33 mph (850.26 km/h), a record that still stands.

Additionally, the “Rare Bear” has won the unlimited class at the Reno Air Races multiple times, demonstrating the enduring performance of this unique aircraft.

Despite the progression of technology and the advent of more modern aircraft, “Rare Bear” continues to impress aviation enthusiasts around the world, embodying the spirit and performance of the F8F Bearcat.

This has helped to maintain the Bearcat’s reputation as an exceptionally high-performance aircraft, even decades after its military service ended.


The Bearcat stands as a testament to the peak of piston-engined fighter design. The last in a storied line of Grumman ‘Cat’ fighters, the Bearcat represented a culmination of the technological advancements and combat experience from World War II.

Despite its short operational lifespan, its legacy lives on in the high-speed spectacle of air racing, continually reminding us of a golden era of propeller-driven fighter aircraft.

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  • Crew: 1
  • Length: 28 ft 3 in (8.61 m)
  • Wingspan: 35 ft 10 in (10.92 m)
  • Height: 13 ft 10 in (4.22 m)
  • Empty weight: 7,650 lb (3,470 kg)
  • Max takeoff weight: 13,460 lb (6,105 kg)
  • Powerplant: 1 × Pratt & Whitney R-2800-30W Double Wasp 18-cylinder air-cooled radial piston engine, 2,250 hp (1,680 kW)
  • Maximum speed: 455 mph (732 km/h, 395 kn)
  • Range: 1,105 mi (1,778 km, 960 nmi)
  • Service ceiling: 40,800 ft (12,400 m)
  • Rate of climb: 4,465 ft/min (22.68 m/s)