Grumman F4F Wildcat

Why the F4F Wildcat Mattered

The Grumman F4F Wildcat was the main U.S. Navy and Marine Corps fighter when the Pacific War began. It was slower and less agile than the Japanese Mitsubishi A6M Zero, yet it was tougher and carried a better gun battery.

It never had the glamour of the F6F Hellcat that replaced it. It did the hard work in 1941 and 1942, while the Navy waited for something better.

The full specification table for the aircraft is on this page. This article covers the story behind the numbers.

From Biplane to Monoplane

Grumman’s fighter line began with biplanes, including the F2F and F3F. The first F4F design, the XF4F-1, was another biplane, and Grumman dropped it once it was clear a rival monoplane from Brewster would outclass it.

The XF4F-2 monoplane first flew on September 2, 1937. A redesigned XF4F-3 followed, and the Navy ordered the type into production.

The Royal Navy got there first. A French order for export Wildcats was taken over by Britain after France fell, and those aircraft entered British service on September 8, 1940 as the Martlet. The U.S. Navy introduced the F4F-3 in December 1940.

The Wildcat Against the Zero

The first model to fight with the Pacific Fleet was the F4F-3. Pilots liked it, although early aircraft lacked pilot armor, self-sealing fuel tanks and reflector gunsights, and the guns tended to jam.

The Zero was faster in level flight, climbed better and was more maneuverable in those regimes. The Wildcat was faster and steadier in a dive, built sturdier and carried the more effective guns.

That mix decided how pilots fought. Instead of turning with a Zero, they used dives, hit-and-run attacks and mutual support.

Lt. Cdr. John Thach worked out a defensive maneuver in 1941 after reading intelligence reports on the Zero. Friendly fighters flew in formation and maneuvered together to counter diving attacks, a tactic later named the Thach Weave. Thach used it at Midway, though it spread through the fleet slowly.

At Wake Island in December 1941, four Marine F4F-3s played a prominent role in the defense. Capt. Henry Elrod of VMF-211 was awarded the Medal of Honor posthumously for his combat there.

F4F-4: More Guns, Folding Wings, Less Performance

The F4F-4 reached carriers in 1941 with Grumman’s patented Sto-Wing folding wings. Folding let a carrier fit far more fighters on deck, and squadron strength rose from 18 to 27 aircraft.

It also carried six guns instead of four, on the same engine. The extra weight cost performance, and pilots disliked it.

The six-gun layout also split the ammunition. The F4F-3’s four guns carried 450 rounds each, about 34 seconds of fire, while the F4F-4’s six guns carried 240 rounds each and ran dry in under 20 seconds.

The F4F-4 was the definitive version at the Battle of Midway, and it was the Wildcat that fought through the Guadalcanal campaign in the second half of 1942.

Guadalcanal and the Marine Aces

Wildcats flew from Henderson Field on Guadalcanal as part of the Cactus Air Force. Marine pilots there took the type to its best-known scores.

Capt. Joe Foss of VMF-121 was awarded the Medal of Honor for his combat over Guadalcanal from October 9 to November 19, 1942. With 26 victories, he was the top-scoring Wildcat ace.

Maj. Robert Galer of VMF-224 and Lt. Col. Harold Bauer of VMF-212 also received the Medal of Honor for their actions in the Solomon Islands campaign. Even Saburo Sakai, a leading Japanese ace, described the Wildcat’s ability to absorb punishment.

Why Pilots Survived the Wildcat’s Weaknesses

The Wildcat’s airframe was strong, and its pilots had help from a homing beacon called the ZB, which let them find their carriers in poor visibility. It was far from foolproof: at Midway, ten F4F-4s from USS Hornet’s VF-8 crashed in the sea after failing to find their carrier.

The record still favored the type. Navy and Marine F4Fs and FMs flew 15,553 combat sorties in World War II and claimed 1,327 enemy aircraft for 178 aerial losses, a claimed ratio of 6.9 to 1. Claims in air combat run high on every side, so treat that ratio as a claimed figure, not a proven one.

The Wildcat Goes On: FM-1, FM-2 and the Escort Carriers

Grumman stopped building Wildcats in early 1943 to make room for the Hellcat. General Motors’ Eastern Aircraft Division kept going, first with the FM-1, which matched the F4F-4 but with four guns, and then with the improved FM-2.

The FM-2 was based on the XF4F-8 prototype, nicknamed the “Wilder Wildcat.” It had a more powerful engine and a taller tail to handle the added torque. Eastern built roughly three-quarters of all Wildcats.

The Wildcat’s slower landing speed suited the short flight decks of escort carriers. From 1943, FM-2s there hunted submarines, supported ground troops and still shot down Japanese aircraft, including kamikazes.

On October 25, 1944, at the Battle off Samar, Wildcats and Avengers from escort carriers strafed a powerful Japanese surface fleet to help buy time for the escort carriers to escape.

What Replaced the Wildcat

The Grumman F6F Hellcat and the Vought F4U Corsair replaced the Wildcat on fleet carriers. The Hellcat had around 50 percent more power available and could outperform the Zero, and it superseded the Wildcat in front-line service in 1943 and 1944. Its design already owed a great deal to the Wildcat.

The Wildcat itself left military service in 1945. Roughly 7,860 to 7,885 were built, depending on the source, across Grumman and General Motors production.

Frequently Asked Questions

Was the Wildcat a good plane?

It was a good plane for the moment it served. It was outperformed by the Zero in speed, climb and agility, but it was sturdy, fast in a dive and well armed, and it bought the Navy time until the Hellcat and Corsair arrived in 1943.

What replaced the Wildcat?

The Grumman F6F Hellcat and the Vought F4U Corsair replaced it on fleet carriers in 1943 and 1944. The Wildcat stayed in service on escort carriers, as the General Motors FM-2, until 1945.

How many F4F Wildcats were built?

Sources give roughly 7,860 to 7,885. Grumman built the early aircraft, and General Motors’ Eastern Aircraft Division took over production in 1942 and built roughly three-quarters of the total.

Why did the British call it the Martlet?

Britain gave the Wildcat its own name. Wildcats ordered by Britain, including the former French order, were Martlets, and the first entered British service on September 8, 1940.

What was the difference between the F4F-3 and F4F-4?

The F4F-4 added folding wings and a sixth gun while keeping the same engine. It stored more compactly on a carrier, but it was heavier and slower than the F4F-3.

Who was the top Wildcat ace?

Marine Capt. Joe Foss, with 26 victories flying with VMF-121 over Guadalcanal. He received the Medal of Honor for his combat there in October and November 1942.