F4F Wildcat
Encyclopedia
The Grumman F4F Wildcat was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 carrier-based
Carrier-based aircraft
Carrier-based aircraft are military aircraft designed specifically for operations from aircraft carriers. The term is generally applied only to fixed-wing aircraft, as naval helicopters are able to operate from a wider variety of aviation-capable ships. Carrier-based aircraft must be relatively...

 fighter aircraft
Fighter aircraft
A fighter aircraft is a military aircraft designed primarily for air-to-air combat with other aircraft, as opposed to a bomber, which is designed primarily to attack ground targets...

 that began service with both the United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 and the British Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 (as the Martlet) in 1940. First used in combat by the British in Europe, the Wildcat was the only effective fighter available to the United States Navy and Marine Corps in the Pacific Theater during the early part of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 in 1941 and 1942. (Although the Brewster Buffalo
Brewster Buffalo
The Brewster F2A Buffalo was an American fighter aircraft which saw limited service early in World War II. Though the Buffalo won a competition against the Grumman F4F Wildcat in 1939 to become the US Navy's first monoplane fighter aircraft, it turned out to be a big disappointment...

 was the Navy's first monoplane fighter, it proved disappointing in combat. It was withdrawn very early in the war and replaced by Wildcats as they became available.) With a top speed of 318 mph (511.8 km/h), the Wildcat was outperformed by the faster and more nimble 331 mph (532.7 km/h) Mitsubishi A6M Zero, but its ruggedness, coupled with tactics such as the Thach Weave
Thach Weave
The Thach Weave or Beam Defense Position is an aerial combat tactic developed by naval aviator John S. Thach of the United States Navy soon after the United States' entry into World War II....

, resulted in an air combat kill-to-loss ratio of 5.9:1 in 1942 and 6.9:1 for the entire war.

Lessons learned from the Wildcat were applied to the faster F6F Hellcat which could outperform the Zero on its own terms. The Wildcat continued to be built throughout the remainder of the war to serve on escort carrier
Escort aircraft carrier
The escort aircraft carrier or escort carrier, also called a "jeep carrier" or "baby flattop" in the USN or "Woolworth Carrier" by the Royal Navy, was a small and slow type of aircraft carrier used by the British Royal Navy , the Imperial Japanese Navy and Imperial Japanese Army Air Force, and the...

s, where larger and heavier fighters could not be used.

Design and development

Grumman fighter development began with the two-seat Grumman FF
Grumman FF
|-See also:-References:NotesBibliography* Cacutt, Len, ed. "Grumman Single-Seat Biplane Fighters." Great Aircraft of the World. London: Marshall Cavendish, 1989. ISBN 1-85435-250-4....

 biplane
Biplane
A biplane is a fixed-wing aircraft with two superimposed main wings. The Wright brothers' Wright Flyer used a biplane design, as did most aircraft in the early years of aviation. While a biplane wing structure has a structural advantage, it produces more drag than a similar monoplane wing...

. The FF was the first US naval fighter with a retractable landing gear
Undercarriage
The undercarriage or landing gear in aviation, is the structure that supports an aircraft on the ground and allows it to taxi, takeoff and land...

. The wheels retracted into the fuselage
Fuselage
The fuselage is an aircraft's main body section that holds crew and passengers or cargo. In single-engine aircraft it will usually contain an engine, although in some amphibious aircraft the single engine is mounted on a pylon attached to the fuselage which in turn is used as a floating hull...

, leaving the tires visibly exposed, flush with sides of the fuselage. Two single-seat biplane designs followed, the F2F and F3F, which established the general fuselage outlines of what would become the F4F Wildcat. In 1935, while the F3F was still undergoing flight testing, Grumman started work on its next biplane fighter, the G-16. At the time, the Navy favored a monoplane
Monoplane
A monoplane is a fixed-wing aircraft with one main set of wing surfaces, in contrast to a biplane or triplane. Since the late 1930s it has been the most common form for a fixed wing aircraft.-Types of monoplane:...

 design, the Brewster F2A-1, ordering production early in 1936, however an order was also placed for Grumman's G-16 (given the navy designation XF4F-1) as a backup in case the Brewster monoplane proved to be unsatisfactory.

It was clear to Grumman that the XF4F-1 would be inferior to the Brewster monoplane, so Grumman abandoned the XF4F-1, designing instead a new monoplane fighter, the XF4F-2. The XF4F-2 would retain the same, fuselage-mounted, hand-cranked landing gear as the F3F, with its relatively narrow track. (The unusual landing gear design was originally created in the 1920's by Leroy Grumman for Grover Loening
Grover Loening
Grover Cleveland Loening was an American aircraft manufacturer.-Biography:Loening was born in Bremen, Germany, while his American-born father was stationed there as U.S. Consul. He graduated from Columbia University in New York City, where he was awarded the first-ever degree in Aeronautical...

. It was on all of Grumman's fighter biplanes (from the FF-1 through the F3F) of the 1930s and on the J2F Duck
Grumman J2F Duck
|-Popular culture:* A J2F Duck was used in the 1971 film Murphy's War, which includes a spectacular three-minute rough water takeoff scene along with numerous flying and aerobatic sequences...

 amphibious flying boat
Flying boat
A flying boat is a fixed-winged seaplane with a hull, allowing it to land on water. It differs from a float plane as it uses a purpose-designed fuselage which can float, granting the aircraft buoyancy. Flying boats may be stabilized by under-wing floats or by wing-like projections from the fuselage...

 as well.) Landing accidents caused by failure of the gear to fully lock into place were distressingly common.
The overall performance of Grumman's new monoplane was felt to be inferior to that of the Brewster Buffalo. The XF4F-2 was marginally faster, but the Buffalo was more maneuverable. It was judged superior and was chosen for production. After losing out to Brewster, Grumman completely rebuilt the prototype as the XF4F-3 with new wings and tail and a supercharged version of the Pratt & Whitney
Pratt & Whitney
Pratt & Whitney is a U.S.-based aerospace manufacturer with global service operations. It is a subsidiary of United Technologies Corporation . Pratt & Whitney's aircraft engines are widely used in both civil aviation and military aviation. Its headquarters are in East Hartford, Connecticut, USA...

 R-1830 "Twin Wasp" radial engine. Testing of the new XF4F-3 led to an order for F4F-3 production models, the first of which was completed in February 1940. France also ordered the type, powered by a Wright R-1820
Wright R-1820
|-See also:-References:* Bridgman, L, Jane's Fighting Aircraft of World War II. Crescent. ISBN 0-517-67964-7* Eden, Paul & Soph Moeng, The Complete Encyclopedia of World Aircraft. Amber Books Ltd. Bradley's Close, 74-77 White Lion Street, London, NI 9PF, 2002, ISBN 0-7607-3432-1), 1152...

 "Cyclone 9" radial engine, but France fell before they could be delivered and the aircraft went instead to the British Royal Navy, who christened the new fighter the "Martlet
Martlet
A martlet is a heraldic charge depicting a stylized bird with short tufts of feathers in the place of legs...

." The US Navy officially adopted the aircraft type on 1 October 1941 as the "Wildcat." Both the British and US Navy's F4F-3's, armed with four .50 in (12.7 mm) Browning machine guns, joined active units in 1940.

The Wildcat's successor was the F6F Hellcat, a complete redesign which dropped Grumman's distinctive, hand-cranked, fuselage-retracting landing gear arrangement, replacing it with landing gear which was hydraulically retracted backward into the wings. The Hellcat, which first flew in 1942, almost completely outclassed the Zero, surprising many Japanese pilots who, on their first encounter with the new fighter, often mistook it for the older, slower Wildcat. (Later in the war, US Navy would also introduce another higher-performance fighter, the Vought F4U Corsair, which could match the top speed of the fastest land-based aircraft of the day.)

Royal Navy

Even before the Wildcat had been purchased by US Navy, both the French Navy and the British Royal Navy's Fleet Air Arm (FAA) had ordered the Wildcat, with their own configurations..

The F4F Wildcat (known in British service as the Martlet) was taken on by the British Fleet Air Arm
Fleet Air Arm
The Fleet Air Arm is the branch of the British Royal Navy responsible for the operation of naval aircraft. The Fleet Air Arm currently operates the AgustaWestland Merlin, Westland Sea King and Westland Lynx helicopters...

 as part of an interim replacement for the Fairey Fulmar
Fairey Fulmar
The Fairey Fulmar was a British carrier-borne fighter aircraft that served with the Fleet Air Arm during the Second World War. A total of 600 were built by Fairey Aviation at its Stockport factory between January 1940 and December 1942...

. The Fulmar was a two seat fighter with good range but at a performance disadvantage against single seater fighters; navalised Supermarine Spitfire
Supermarine Seafire
The Supermarine Seafire was a naval version of the Supermarine Spitfire specially adapted for operation from aircraft carriers. The name Seafire was arrived at by collapsing the longer name Sea Spitfire.-Origins of the Seafire:...

s were not being made available because of the greater need of the Royal Air Force
Royal Air Force
The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

. In the European theater, the Wildcat scored its first combat victory on Christmas Day 1940, when a land-based Martlet destroyed a Junkers Ju 88
Junkers Ju 88
The Junkers Ju 88 was a World War II German Luftwaffe twin-engine, multi-role aircraft. Designed by Hugo Junkers' company through the services of two American aviation engineers in the mid-1930s, it suffered from a number of technical problems during the later stages of its development and early...

 bomber over the Scapa Flow
Scapa Flow
right|thumb|Scapa Flow viewed from its eastern endScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy. It is about...

 naval base. This was the first combat victory by a US-built fighter in British service in World War II. The type also pioneered combat operations from the smaller escort carriers.

Six Martlets went to sea aboard the converted former German merchant vessel in September 1941 and shot down several Luftwaffe
Luftwaffe
Luftwaffe is a generic German term for an air force. It is also the official name for two of the four historic German air forces, the Wehrmacht air arm founded in 1935 and disbanded in 1946; and the current Bundeswehr air arm founded in 1956....

Fw 200 Condor
Focke-Wulf Fw 200
The Focke-Wulf Fw 200 Condor, also known as Kurier to the Allies was a German all-metal four-engine monoplane originally developed by Focke-Wulf as a long-range airliner...

 bombers during highly effective convoy escort operations. These were the first of many Wildcats to see shipboard combat.

The Fleet Air Arm (FAA) was later to abandon the practice of using its own unique names for US-provided aircraft in British naval service, and began to use the US Navy's aircraft names instead. In March 1945, Wildcats shot down four Messerschmitt Bf 109
Messerschmitt Bf 109
The Messerschmitt Bf 109, often called Me 109, was a German World War II fighter aircraft designed by Willy Messerschmitt and Robert Lusser during the early to mid 1930s...

s over Norway, the FAA's last victory with a Wildcat.

Pacific

The Wildcat was outperformed by the Mitsubishi Zero, its major opponent in the early part of the Pacific Theater
Pacific Theater of Operations
The Pacific Theater of Operations was the World War II area of military activity in the Pacific Ocean and the countries bordering it, a geographic scope that reflected the operational and administrative command structures of the American forces during that period...

, but held its own partly because, with relatively heavy armor and self-sealing fuel tank
Self-sealing fuel tank
In aviation, self-sealing fuel tank is a fuel tank technology in wide use since World War II that prevents fuel tanks primarily on aircraft from leaking fuel and igniting after being damaged by enemy fire....

s, the Grumman airframe could survive far more damage than its lightweight, unarmored Japanese rival. Many US Navy fighter pilots also were saved by the Wildcat's ZB homing device, which allowed them to find their carriers in poor visibility, provided they could get within the 30 mi (48.3 km) range of the homing beacon.

In the hands of an "expert pilot" using tactical advantage, the Wildcat could prove to be a difficult foe even against the formidable Zero. After analyzing Fleet Air Tactical Unit Intelligence Bureau reports describing the new carrier fighter, USN Commander
Commander (United States)
In the United States, commander is a military rank that is also sometimes used as a military title, depending on the branch of service. It is also used as a rank or title in some organizations outside of the military, particularly in police and law enforcement.-Naval rank:In the United States...

 "Jimmy" Thach
John Thach
John Smith "Jimmy" Thach was a World War II naval aviator, air combat tactician, and United States Navy admiral. Thach developed the Thach Weave, a combat flight formation that could counter enemy fighters of superior performance, and later the big blue blanket, an aerial defense against Kamikaze...

 devised a defensive strategy that allowed Wildcat formations to act in a coordinated maneuver to counter a diving attack, called the "Thach Weave
Thach Weave
The Thach Weave or Beam Defense Position is an aerial combat tactic developed by naval aviator John S. Thach of the United States Navy soon after the United States' entry into World War II....

."

Four US Marine Corps Wildcats played a prominent role in the defence of Wake Island
Wake Island
Wake Island is a coral atoll having a coastline of in the North Pacific Ocean, located about two-thirds of the way from Honolulu west to Guam east. It is an unorganized, unincorporated territory of the United States, administered by the Office of Insular Affairs, U.S. Department of the Interior...

 in December 1941. USN and USMC aircraft were the fleet's primary air defense during the Battles of Coral Sea and Midway
Battle of Midway
The Battle of Midway is widely regarded as the most important naval battle of the Pacific Campaign of World War II. Between 4 and 7 June 1942, approximately one month after the Battle of the Coral Sea and six months after Japan's attack on Pearl Harbor, the United States Navy decisively defeated...

, and land-based Wildcats played a major role during the Guadalcanal Campaign
Guadalcanal campaign
The Guadalcanal Campaign, also known as the Battle of Guadalcanal and codenamed Operation Watchtower by Allied forces, was a military campaign fought between August 7, 1942 and February 9, 1943 on and around the island of Guadalcanal in the Pacific theatre of World War II...

 of 1942–43. It was not until 1943 that more advanced naval fighters capable of taking on the Zero on more even terms, the F6F Hellcat and F4U Corsair, reached the South Pacific theatre.
The Japanese ace Saburo Sakai
Saburo Sakai
Sub-Lieutenant was a Japanese naval aviator and flying ace of the Imperial Japanese Navy during World War II. Sakai was the Imperial Navy's fourth-ranking ace and Japan's second leading fighter pilot to survive the war ....

 described the Wildcat's capability of absorbing damage:

Atlantic

US Navy Wildcats participated in Operation Torch. USN escort carriers in the Atlantic used Wildcats.

Grumman's Wildcat production ceased in early 1943 to make way for the newer F6F Hellcat, but General Motors
General Motors
General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...

 continued producing Wildcats for both US Navy and Fleet Air Arm use. From 1943 onward, Wildcats equipped with bomb racks were primarily assigned to escort carriers for use against submarines and attacking ground targets, though they would also continue to score kills against Japanese fighters, bombers and kamikaze aircraft. Larger fighters such as the Hellcat and the Corsair and dedicated dive bombers were needed aboard fleet carriers, and the Wildcat's slower landing speed made it more suitable for shorter flight decks. In the Battle off Samar
Battle off Samar
The Battle off Samar was the centermost action of the Battle of Leyte Gulf, one of the largest naval battles in history, which took place in the Philippine Sea off Samar Island, in the Philippines on 25 October 1944...

, fleet carriers had failed to destroy a battleship-led force, but it was lightly armed Avengers and FM fighters from escort carriers of Taffy 3 which found themselves backed against the wall in the path of a much larger Japanese fleet away from Leyte Gulf. By resorting to tactics such as strafing ships including the bridge of the Japanese battleship Yamato
Japanese battleship Yamato
, named after the ancient Japanese Yamato Province, was the lead ship of the Yamato class of battleships that served with the Imperial Japanese Navy during World War II. She and her sister ship, Musashi, were the heaviest and most powerfully armed battleships ever constructed, displacing...

, the combined efforts of what was only equipped as a slow light escort force turned back the Japanese fleet. At first, GM produced the FM-1 (identical to the F4F-4, but with four guns). Production later switched to the improved FM-2 (based on Grumman's XF4F-8 prototype) optimized for small-carrier operations, with a more powerful engine, and a taller tail to cope with the increased torque.

In all, 7,860 Wildcats were built. The British received 300 Eastern Aircraft FM-1s as the Martlet V in 1942/43 and 340 FM-2s as the Wildcat VI. In total, nearly 1,200 Wildcats would serve with the FAA. By January 1944, the Martlet name was dropped and the type was identified as "Wildcat."

During the course of the war, Navy and Marine F4Fs and FMs flew 15,553 combat sorties (14,027 of these from aircraft carriers), destroying 1,327 enemy aircraft at a cost of 191 Wildcats (an overall kill-to-loss ratio of 6.9:1). True to their escort fighter role, Wildcats dropped only 154 tons of bombs during the war.

F4F-1/-2

The original Grumman F4F-1 design was a biplane, which proved inferior to rival designs, necessitating a complete redesign as a monoplane named the F4F-2. This design was still not competitive with the Brewster F2A Buffalo which won initial US Navy orders, but when the F4F-3 development was fitted with a more powerful version of the engine, a Pratt & Whitney Twin Wasp R-1830-76, featuring a two-stage supercharger, it showed its true potential.

F4F-3

US Navy orders followed as did some (with Wright Cyclone
Wright Cyclone
Wright Cyclone was the name given to a family of air-cooled radial piston engines designed by Curtiss-Wright and used in numerous American aircraft in the 1930s and 1940s.-Background:...

 engines) from France; these ended up with the Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

's Fleet Air Arm after the fall of France and entered service on 8 September 1940. These aircraft, designated by Grumman as G-36A, had a different cowling from other earlier F4Fs and fixed wings, and were intended to be fitted with French armament and avionics
Avionics
Avionics are electronic systems used on aircraft, artificial satellites and spacecraft.Avionic systems include communications, navigation, the display and management of multiple systems and the hundreds of systems that are fitted to aircraft to meet individual roles...

 following delivery. In British service initially, the aircraft were known as the Martlet I, but not all Martlets would be to exactly the same specifications as US Navy aircraft. All Martlet Is featured the four .50 in (12.7 mm) M2 Browning machine guns of the F4F-3 with 450 rpg. The British directly ordered and received a version with the original Twin Wasp, but again with a modified cowling
Cowling
A cowling is the covering of a vehicle's engine, most often found on automobiles and aircraft.A cowling may be used:* for drag reduction* for engine cooling by directing airflow* as an air intake for jet engines* for decorative purposes...

, under the manufacturer designation G-36B. These aircraft were given the designation Martlet II by the British. The first 10 G-36Bs were fitted with non-folding wing
Folding wing
A folding wing is a design feature of aircraft to save space in the airfield, and time, and is typical of naval aircraft that operate from the limited deck space of aircraft carriers. The folding allows the aircraft to occupy less space in a confined hangar because the folded wing normally rises...

s and were given the designation Martlet III. These were followed by 30 folding wing aircraft (F4F-3As) which were originally destined for the Hellenic Air Force
Hellenic Air Force
The Hellenic Air Force, abbreviated to HAF is the air force of Greece. The mission of the Hellenic Air Force is to guard and protect Greek airspace, provide air assistance and support to the Hellenic Army and the Hellenic Navy, as well as the provision of humanitarian aid in Greece and around the...

, which were also designated Martlet IIIs. On paper, the designation changed to Marlet III(A) when the second series of Martlet III was introduced.

Poor design of the armament installation on early F4Fs caused these otherwise reliable machine guns to frequently jam, a problem common to wing-mounted weapons of many US fighters early in the war. It was an F4F-3 flown by Lieutenant
Lieutenant
A lieutenant is a junior commissioned officer in many nations' armed forces. Typically, the rank of lieutenant in naval usage, while still a junior officer rank, is senior to the army rank...

 Edward O'Hare
Edward O'Hare
Lieutenant Commander Edward Henry “Butch” O’Hare was an Irish-American naval aviator of the United States Navy who on February 20, 1942 became the U.S. Navy's first flying ace and Medal of Honor recipient in World War II. Butch O’Hare’s final action took place on the night of November 26, 1943,...

 that in a few minutes shot down five Mitsubishi twin-engine bombers attacking off Bougainville on 20 February 1942. But contrasting with O'Hare's performance, his wingman was unable to participate because his guns would not function.
A shortage of two-stage supercharger
Supercharger
A supercharger is an air compressor used for forced induction of an internal combustion engine.The greater mass flow-rate provides more oxygen to support combustion than would be available in a naturally aspirated engine, which allows more fuel to be burned and more work to be done per cycle,...

s lead to the development of the F4F-3A, which was basically the F4F-3 but with a 1200 hp Pratt & Whitney R-1830-90 radial engine
Radial engine
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel...

 with a more primitive single-stage two-speed supercharger. The F4F-3A, which was capable of 312 mph (502.1 km/h) at 16000 ft (4,876.8 m), was used side by side with the F4F-3, but its poorer performance made it unpopular with US Navy fighter pilots. The F4F-3A would enter service as the Martlet III(B).

At the time of Pearl Harbor, only had a fully equipped Wildcat squadron, VF-6 with F4F-3As. Enterprise was then transferring a detachment of VMF-211, also equipped with F4F-3s, to Wake. was in San Diego, working up for operations of the F4F-3s of VF-3. 11 F4F-3s of VMF-211 were at the Ewa Marine Air Corps Station on Oahu; nine of these were damaged or destroyed during the Japanese attack. The detachment of VMF-211 on Wake lost seven Wildcats to Japanese attacks on 8 December, but the remaining five put up a fierce defense, making the first bomber kill on 9 December. The destroyer was sunk by the Wildcats, and the Japanese invasion force retreated.

In May 1942, the F4F-3s of VF-2 and VF-42, onboard and Lexington, participated in the Battle of the Coral Sea
Battle of the Coral Sea
The Battle of the Coral Sea, fought from 4–8 May 1942, was a major naval battle in the Pacific Theater of World War II between the Imperial Japanese Navy and Allied naval and air forces from the United States and Australia. The battle was the first fleet action in which aircraft carriers engaged...

. Lexington and Yorktown fought against the , and the light carrier in this battle, in an attempt to halt a Japanese invasion of Port Moresby on Papua. During these battles, it became clear that attacks without fighter escort amounted to suicide, but that the fighter component on the carriers was completely insufficient to provide both fighter cover for the carrier and an escort for an attack force. Most US carriers carried less than 20 fighters.

F4F-3S "Wildcatfish"

This floatplane
Floatplane
A floatplane is a type of seaplane, with slender pontoons mounted under the fuselage; only the floats of a floatplane normally come into contact with water, with the fuselage remaining above water...

 version of the F4F-3 was developed for use at forward island bases in the Pacific, before the construction of airfields. It was inspired by appearance of the A6M2-N "Rufe", a modification of the Mitsubishi A6M2 "Zeke". BuNo 4083 was modified to become the F4F-3S "Wildcatfish". Twin floats, manufactured by Edo Aircraft Corporation
Edo Aircraft Corporation
Edo Aircraft Corporation was an American aircraft manufacturing company known primarily for manufacturing pontoons for floatplanes.-History:...

, were fitted. To restore the stability, small auxiliary fins were added to the tailplane
Tailplane
A tailplane, also known as horizontal stabilizer , is a small lifting surface located on the tail behind the main lifting surfaces of a fixed-wing aircraft as well as other non-fixed wing aircraft such as helicopters and gyroplanes...

. Because this was still insufficient, a ventral fin was added later.

The F4F-3S was first flown 28 February 1943. The weight and drag of the floats reduced the maximum speed to 241 mph (387.9 km/h). As the performance of the basic F4F-3 was already below that of the Zero, the F4F-3S was clearly of limited usefulness. In any case, the construction of the airfields at forward bases by the "Seabee
Seabee
Seabees are members of the United States Navy construction battalions. The word Seabee is a proper noun that comes from the initials of Construction Battalion, of the United States Navy...

s" was surprisingly quick. Only one was converted.

F4F-4

A new version, the F4F-4, entered service in 1942 with six machine guns and folding wings which allowed more aircraft to be crammed on a carrier, increasing the number of fighters that could be parked on a surface by more than a factor of 2. The F4F-4 was the definitive version that saw the most combat service in the early war years, including the Battle of Midway. The F4F-3 was replaced by the F4F-4 in June 1942, during the Battle of Midway; only VMF-221 still used them at that time.

This version was less popular with American pilots because the same amount of ammunition was spread over two additional guns, decreasing firing time. With the F4F-3's four .50 in (12.7 mm) guns and 450 rpg, pilots had 34 seconds of firing time; six guns decreased ammunition to 240 rpg, which could be expended in less than 20 seconds. The increase to six guns was attributed to the Royal Navy, who wanted greater firepower to deal with German and Italian foes. Jimmy Thach is quoted as saying, "A pilot who cannot hit with four guns will miss with eight." Extra guns and folding wings meant extra weight, and reduced performance: the F4F-4 was capable of only about 318 mph (511.8 km/h) at 19400 ft (5,913.1 m). Rate of climb was noticeably worse in the F4F-4; while Grumman optimistically claimed the F4F-4 could climb at a modest 1950 ft (594.4 m) per minute, in combat conditions, pilots found their F4F-4s capable of ascending at only 500 to 1000 ft (152.4 to 304.8 m) per minute. Moreover, the F4F-4's folding wing was intended to allow five F4F-4s to be stowed in the space required by two F4F-3s. In practice, the folding wings allowed an increase of about 50% in the number of Wildcats carried aboard US fleet aircraft carriers. A variant of the F4F-4, designated F4F-4B for contractual purposes, was supplied to the British with a modified cowling and Wright Cyclone engine. These aircraft received the designation of Martlet IV.

FM-1/-2 Wildcat

General Motors / Eastern Aircraft produced 5,280 FM variants of the Wildcat. Grumman's Wildcat production ceased in early 1943 to make way for the newer F6F Hellcat, but General Motors continued producing Wildcats for both US Navy and Fleet Air Arm use. Late in the war, the Wildcat was obsolescent as a front-line fighter compared to the faster (380 mph/610 km/h) F6F Hellcat or much faster (446 mph/718 km/h) F4U Corsair. However, they were adequate for small escort carriers against submarine and shore threats. These relatively modest ships carried only two types of aircraft (along with the GM-built Avengers). The Wildcat's lower landing speed and ability to take off without a catapult made it more suitable for shorter flight decks. At first, GM produced the FM-1, identical to the F4F-4, but reduced the number of guns to four, and added wing racks for two 250 lb (110 kg) bombs or six rockets. Production later switched to the improved FM-2 (based on Grumman's XF4F-8 prototype) optimized for small-carrier operations, with a more powerful engine (the 1350 hp Wright R-1820
Wright R-1820
|-See also:-References:* Bridgman, L, Jane's Fighting Aircraft of World War II. Crescent. ISBN 0-517-67964-7* Eden, Paul & Soph Moeng, The Complete Encyclopedia of World Aircraft. Amber Books Ltd. Bradley's Close, 74-77 White Lion Street, London, NI 9PF, 2002, ISBN 0-7607-3432-1), 1152...

-56), and a taller tail to cope with the torque.

Tasked with supporting ground forces off Leyte, sorely under-armed aircraft from escort carriers such as in the "Taffy" task groups found themselves up against a major surface fleet which they helped turn back in the Battle off Samar. Four FM-2 Wildcats from 's Composite Squadron 94 (VC-94) helped shoot down a number of kamikaze
Kamikaze
The were suicide attacks by military aviators from the Empire of Japan against Allied naval vessels in the closing stages of the Pacific campaign of World War II, designed to destroy as many warships as possible....

aircraft attacking off Okinawa before running out of ammunition.

F4F-7

The F4F-7 was a photoreconnaissance variant, with armor and armament removed. It had non-folding "wet" wings that carried an additional 555 gal (2,101 L) of fuel for a total of about 700 gal (2,650 L), increasing its range to 3,700 mi (5,955 km). A total of 21 were built.

F2M Wildcat

The F2M-1 was a planned development of the FM-1 by General Motors / Eastern Aircraft to be powered by the improved XR-1820-70 engine, but the project was cancelled before any aircraft were built.

Martlet Mk I

At the end of 1939, Grumman received a French order for 81 aircraft of model G-36A, to equip their new — and . The main difference with the basic model G-36 was due to the unavailability for export of the two-stage supercharged engine of F4F-3. The G-36A was powered by the nine-cylinder, single-row R-1820-G205A radial engine, of 1200 hp and with a single-stage two-speed supercharger.
The G-36A had also French instrumentation
Flight instruments
Flight instruments are the instruments in the cockpit of an aircraft that provide the pilot with information about the flight situation of that aircraft, such as height, speed and altitude...

, radio, and gunsight
Sight (device)
A sight is a device used to assist aligning or aim weapons, surveying instruments, or other items by eye. Sights can be a simple set or system of markers that have to be aligned together as well as aligned with the target...

. The throttle was modified to conform to French pre-war practice: the throttle lever was moved towards the pilot, (i.e., backward), to increase engine power. The armament which was to be fitted in France was six 7.5 mm (.296 in) Darne machine guns (two in the fuselage and four in the wings). The first G-36A was flown on 11 May 1940.

After the defeat of France
Battle of France
In the Second World War, the Battle of France was the German invasion of France and the Low Countries, beginning on 10 May 1940, which ended the Phoney War. The battle consisted of two main operations. In the first, Fall Gelb , German armoured units pushed through the Ardennes, to cut off and...

, all contracts were taken over by Britain. The throttle was modified again, four 0.50 in (12.7 mm) guns were installed in the wings, and most traces of the original ownership removed. The Martlets were modified for British use by Blackburn
Blackburn Aircraft
Blackburn Aircraft Limited was a British aircraft manufacturer that concentrated mainly on naval and maritime aircraft during the first part of the 20th century.-History:...

, which continued to do this for all later marks. British gunsights, catapult
Aircraft catapult
An aircraft catapult is a device used to launch aircraft from ships—in particular aircraft carriers—as a form of assisted take off. It consists of a track built into the flight deck, below which is a large piston or shuttle that is attached through the track to the nose gear of the aircraft, or in...

 spools, and other items were installed. After initial attempts to fit British radio sets, it was decided to use the much superior American equipment.

The first ones entered service in August 1940, with 804 Naval Air Squadron
804 Naval Air Squadron
804 Naval Air Squadron was a Naval Air Squadron of the Royal Navy, formed in November 1939 from part of 769 NAS Sea Gladiators which had been detached to RNAS Hatston. The squadron was merged into 800 NAS in June 1944 and subsequently reformed in September.-World War II:During World War II, she...

, then stationed at Hatson in the Orkney Islands. The Martlet Mk I did not have a wing folding mechanism, and was therefore only used from land bases.

In 1940, Belgium also placed an order for at least 10 Martlet Mk 1s. These were to be modified with the removal of the tailhook, however, after the surrender of Belgium, none were delivered and by May 10, 1940, the aircraft order was transferred to the Royal Navy.

Martlet Mk II

Before the Fleet Air Arm took on charge the Martlet Mk Is it had already ordered 100 G-36B fighters. The British chose the Pratt & Whitney R-1830-S3C4-G engine to power this aircraft; this too had a single-stage, two-speed supercharger. The FAA decided to accept a delay in delivery to get folding wings, which were vitally important if the Martlet was to be used from British carriers with their small hangar decks. Nevertheless, the first 10 received had fixed wings. The first Martlet with folding wings was not delivered before August 1941.

In contrast to USN F4F-3, the British aircraft were fitted with armor and self-sealing fuel tanks. The Mk II also had a larger tailwheel. For carrier operations, the "sting" tail hook and attachment point for the American single-point catapult launch system were considered important advantages. Nevertheless, the Martlets were modified to have British-style catapult spools. The FAA had ordered G-36Bs with fixed wings, but wing-folding allowed a carrier to handle a larger numbert of aircraft, so the contract was amended to specify the folding wings, but the first ten of the order had already been built with fixed wings. Deliveries of the folding-wing G-36Bs began in August 1941, with 36 shipped to UK and 54 shipped to the Far East; they were designated "Martlet Mark II".
The Martlet was the only single-seat, monoplane carrier fighter available to the British fleet until the introduction of the Sea Hurricane II in 1942.

The majority of the Martlet Mk IIs were sent to the Far East. The first shipboard operations of the type in British service were in September 1941, on board of , a very small escort carrier with a carrier deck of 420 ft (128 m) by 59 ft (18 m), no elevators and no hangar deck. The six Wildcats were parked on the deck at all times. On its first voyage, it served as escort carrier for a convoy to Gibraltar. On 20 September, a German FW 200 was shot down. On the next voyage, four Fw 200 Condors fell to the guns of the Martlets. Operations from Audacity also demonstrated that the fighter cover was useful against U-boats. Audacity was sunk by an U-boat on 21 December 1941, but it had already proven the usefulness of escort carriers.

In May 1942, the 881 and 882 squadrons on , participated in operations against Madagascar. In August 1942, 806 NAS on provided fighter cover for a convoy to Malta
Malta
Malta , officially known as the Republic of Malta , is a Southern European country consisting of an archipelago situated in the centre of the Mediterranean, south of Sicily, east of Tunisia and north of Libya, with Gibraltar to the west and Alexandria to the east.Malta covers just over in...

. Later in that year they participated in the landings in French North Africa.

Martlet Mk III

The first 30 F4F-3As were released for sale to Greece, after the Italian invasion in November 1940
Greco-Italian War
The Greco-Italian War was a conflict between Italy and Greece which lasted from 28 October 1940 to 23 April 1941. It marked the beginning of the Balkans Campaign of World War II...

. However, at the defeat of Greece in April 1941 the aircraft had only reached Gibraltar. They were taken over by the FAA as Martlet Mk III-B. As these aircraft did not have folding wings, they were only used from land bases. They served in a shore-based role in the Western Desert
Western Desert Campaign
The Western Desert Campaign, also known as the Desert War, was the initial stage of the North African Campaign during the Second World War. The campaign was heavily influenced by the availability of supplies and transport. The ability of the Allied forces, operating from besieged Malta, to...

.

Ten fixed-wing G-36Bs were used by the FAA as Martlet III-A.

Martlet Mk IV

The Royal Navy purchased 220 F4F-4s adapted to British requirements. The main difference was the use of a Wright R-1820-40B Cyclone in a distinctly more rounded and compact cowling, with a single double-wide flap on each side of the rear and no lip intake. These machines were named Martlet Mk IV.

Martlet Mk V

The Fleet Air Arm purchased 312 FM-1s, originally with the designation of Martlet V. In January 1944, a decision was made to retain the American names for US-supplied aircraft, redesignating the batch as the Wildcat V.

Operators

  • Belgian Air Force
    Belgian Air Force
    The Air Component, formerly the Belgian Air Force, is the air arm of the Belgian Armed Forces. Originally founded in 1909, it is one of the world's first air forces, and was a pioneer in aerial combat during the First World War...

    : at least 10 Martlet Mk 1s ordered, never delivered, transferred to Royal Navy after surrender
    Battle of Belgium
    The Battle of Belgium or Belgian Campaign formed part of the greater Battle of France, an offensive campaign by Germany during the Second World War...

    .

  • Aeronavale: 81 aircraft ordered, never delivered, transferred to Royal Navy after French defeat
    Battle of France
    In the Second World War, the Battle of France was the German invasion of France and the Low Countries, beginning on 10 May 1940, which ended the Phoney War. The battle consisted of two main operations. In the first, Fall Gelb , German armoured units pushed through the Ardennes, to cut off and...

    .


 Canada
  • Royal Canadian Navy
    Royal Canadian Navy
    The history of the Royal Canadian Navy goes back to 1910, when the naval force was created as the Naval Service of Canada and renamed a year later by King George V. The Royal Canadian Navy is one of the three environmental commands of the Canadian Forces...

    : RCN personnel assigned to the Royal Navy HMS Puncher
    HMS Puncher (D79)
    USS Willapa was a Bogue-class escort aircraft carrier in the United States Navy, leased to the United Kingdom....

    , were to provide the RCN with experience in aircraft carrier operations. The RCN flew 14 Martlets as part of 881 (RN) Squadron from February–July 1945.

  • Royal Navy
    Royal Navy
    The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

     Fleet Air Arm
    Fleet Air Arm
    The Fleet Air Arm is the branch of the British Royal Navy responsible for the operation of naval aircraft. The Fleet Air Arm currently operates the AgustaWestland Merlin, Westland Sea King and Westland Lynx helicopters...


 United States
  • United States Navy
    United States Navy
    The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

  • United States Marine Corps
    United States Marine Corps
    The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...


Specifications (F4F-3)

Specifications (F4F-4)


See also

External links

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