Tag Archives: Rex Buren Beisel

24 June 1942

Vought-Sikorsky F4U-1 Corsair, Bu. No. 02170, with test pilot Willard Bartlett Boothby, 24 October 1942. This is the twenty-fifth production F4U-1. (Rudy Arnold/National Air and Space Museum NASM-XRA-1294)

24 June 1942: The first production Vought-Sikorsky F4U-1 Corsair, Bu. No. 02155, made its first flight at Stratford, Connecticut. (Some sources state 25 June.)

The Corsair was designed by Rex Buren Beisel, and is best known for its distinctive inverted “gull wing,” which allowed sufficient ground clearance for its 13 foot, 4 inch (4.064 meter) diameter propeller, without using excessively long landing gear struts. The prototype XF4U-1, Bu. No. 1443, had first flown 29 May 1940, with test pilot Lyman A. Bullard in the cockpit.

The F4U-1 was had a length of 33 feet, 4.125 inches (10.163 meters), wingspan of 40 feet, 11.726 inches (12.490 meters) and overall height (to top of propeller arc) of 15 feet, 0.21 inches (4.577 meters). The wings’ angle of incidence was 2°. The outer wing had 8.5° dihedral and the leading edges were swept back 4°10′. With its wings folded, the width of the F4U-1 was 17 feet, 0.61 inches (5.197 meters), and gave it a maximum height of 16 feet, 2.3 inches (4.935 meters). When parked, the Corsair’s 13 foot, 4 inch (4.064 meter) propeller had 2 feet, 1.93 inches (65.862 centimeters) ground clearance, but with the fighter’s thrust line level, this decreased to just 9.1 inches (23.1 centimeters). The F4U-1 had an empty weight of 8,982 pounds (4,074.2 kilograms) and gross weight of 12,162 pounds (5,516.6 kilograms).

Vought-Sikorsky F4U-1 Corsair, Bu. No. 02170, with test pilot Willard Bartlett Boothby, 24 October 1942. (Rudy Arnold/National Air and Space Museum NASM-XRA-1301)

The F4U-1 variant of the Corsair was powered by an air-cooled, supercharged, 2,804.4-cubic-inch-displacement (45.956 liter) Pratt & Whitney Double Wasp SSB2-G (R-2800-8) two-row, 18-cylinder radial engine, with a compression ratio of 6.65:1. The R-2800-8 had a normal power rating of 1,675 horsepower at 2,550 r.p.m. and 44.0 inches of manifold pressure (1.490 bar) at 5,500 feet (1,676 meters); 1,550 horsepower at 21,500 feet (6,553 meters); and 2,000 horsepower at 2,700 r.p.m. with 54.0 inches of manifold pressure (1.829 bar) for takeoff. The engine turned a three-bladed Hamilton Standard Hydromatic constant-speed propeller with a diameter of 13 feet, 4 inches (4.064 meters) through a 2:1 gear reduction. The R-2800-8 was 7 feet, 4.47 inches (2.247 meters) long, 4 feet, 4.50 inches (1.334 meters) in diameter and weighed 2,480 pounds (1,125 kilograms).

Vought-Sikorsky F4U-1 Corsair, circa 1942. (Rudy Arnold)

The F4U-1 had a cruise speed of 186 miles per hour (299 kilometers per hour) at Sea Level. Its maximum speed at Sea Level was 365 miles per hour (587 kilometers per hour). During flight testing, an F4U-1 reached 431 miles per hour (694 kilometers per hour) at 20,300 feet (6,187 meters) with War Emergency Power. The service ceiling was 38,200 feet (11,643 meters) and its maximum range was 1,510 miles (2,430 kilometers) with full main and outer wing tanks.

The Corsair was armed with six air-cooled Browning AN-M2 .50-caliber machine guns, three in each wing, with 400 rounds of ammunition per gun.

Three Browning AN-M2 .50-caliber machine guns and belted ammunition installed in the left wing of a Vought-Sikorsky F4U-1 Corsair, 11 August 1942. (Vought-Sikorsky VS-6015)

A total of 12,571 Corsairs were manufactured by the Vought-Sikorsky Aircraft Division (F4U-1), Goodyear Aircraft Corporation (FG-1D) and Brewster Aeronautical Corporation (F3A-1). The Corsair served the U.S. Navy and Marine Corps in World War II and the Korean War. Corsairs also served in other countries’ armed forces. Its last known use in combat was in Central America in 1969.

Vought-Sikorsky F4U-1 Corsair, circa 1942. (Rudy Arnold/National Air and Space Museum NASM-XRA-1329)

© 2019, Bryan R. Swopes

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29 May 1940

Vought-Sikorsky Aircraft Division XF4U-1 Corsair prototype, Bu. No. 1443, in flight. (Rudy Arnold Collection/NASM)

29 May 1940: Vought-Sikorsky Aircraft Division test pilot Lyman A. Bullard, Jr. took the U.S. Navy’s new prototype fighter, the XF4U-1, Bu. No. 1443, for its first flight at the Bridgeport Municipal Airport, Bridgeport, Connecticut. Designed by Rex Buren Beisel, the prototype would be developed into the famous F4U Corsair.¹

Rex Buren Beisel, designer of the F4U-1 Corsair, at left, with Corsair pilot Major Gregory Boyington, USMCR, circa 1942. (Unattributed)

The F4U Corsair is a single-place, single-engine fighter, designed for operation from the U.S. Navy’s aircraft carriers. The XF4U-1 prototype was 30 feet (9.144 meters) long with a wing span of 41 feet (12.497 meters) and overall height of 15 feet, 7 inches (4.750 meters). It had an empty weight of 7,576 pounds (3,436 kilograms) and gross weight of 9,374 pounds (4,252 kilograms).

Vought-Sikorsky XF4U-1 Corsair, Bu. No. 1443
Vought-Sikorsky XF4U-1 Corsair, Bu. No. 1443. The airplane’s wings are painted yellow. (Vought-Sikorsky Aircraft Division)

The XF4U-1 was first powered by an experimental air-cooled, supercharged, 2,804.4-cubic-inch-displacement (45.956 liters) Pratt & Whitney R-2800 X-2 (Double Wasp A2-G), and then an R-2800 X-4 (Double Wasp SSA5-G), both two-row 18-cylinder radial engines. The R-2800 X-4 was an X-2 with an A5-G supercharger. The R-2800 X-2 had a compression ratio of 6.65:1 and was rated at 1,500 horsepower at 2,400 r.p.m. at 7,500 feet (2,286 meters). The X-4 was rated at 1,600 horsepower at 2,400 r.p.m. at 3,500 feet (1,067 meters); 1,540 horsepower at 2,400 r.p.m. at 13,500 feet (4,115 meters); 1,460 horsepower at 2,400 r.p.m. at 21,500 feet (6,553 meters); and 1,850 horsepower at 2,600 r.p.m for takeoff. The engine drove a 13 foot, 4 inch (4.064 meter) diameter, three-bladed, Hamilton Standard Hydromatic constant-speed propeller through a 2:1 gear reduction. The X-4 had a compression ratio of 6.66:1 and used a two-speed, two-stage supercharger. This was the most powerful engine and largest propeller used on any single engine fighter up to that time. The R-2800 X-4 was 4 feet, 4.50 inches (1.334 meters) in diameter and 7 feet, 4.81 inches (2.256 meters) long. It weighed 2,500 pounds (1,134 kilograms).

The size of the propeller was responsible for the Corsair’s most distinctive feature: the inverted gull wing. The width of the wing (chord) limited the length of the main landing gear struts. By placing the gear at the bend, the necessary propeller clearance was gained. The angle at which the wing met the fuselage was also aerodynamically cleaner.

Vought Aircraft Division XF4U-1, front. (Vought Sikorsky VS-2612)
Vought-Sikorsky XF4U-1 Corsair, front, 19 April 1941. (Vought-Sikorsky VS-2612)
Vought Aircraft Division XF4U-1, right front quarter view. (Vought-Sikorsky VS-2618)
Vought-Sikorsky XF4U-1 Corsair, right front quarter view, 19 April 1941. (Vought-Sikorsky VS-2618)
Vought Aircraft Division XF4U-1, right profile (Vought-Sikorsky VS-2619)
Vought-Sikorsky XF4U-1 Corsair, right profile, 19 April 1941. (Vought-Sikorsky VS-2619)
Vought-Sikorsky XF4U-1, right rear quarter, 26 May 1940. (Vought-Sikorsky VS-1414/ cropped image from Connecticut Air & Space Center)
Vought Aircraft Division XF4U-1, rear, 26 May 1940. (Vought-Sikorsky VS-1407)
Vought-Sikorsky XF4U-1 Corsair, rear, 26 May 1940. (Vought-Sikorsky VS-1407)
Vought Aircraft Division XF4U-1, left side, wings folded, 26 May 1940. (Vought-Sikorsky VS-1416)
Vought-Sikorsky XF4U-1, left side, wings folded, 26 May 1940. (Vought-Sikorsky VS-1416)

The XF4U-1 prototype had a maximum speed of 378 miles per hour (608 kilometers per hour) at 23,500 feet (7,163 meters). Although it has been widely reported that it was the first U.S. single-engine fighter to exceed 400 miles per hour (643.7 kilometers per hour) in level flight, this is actually not the case. During a flight between Stratford and Hartford, Connecticut, the prototype averaged a ground speed 405 miles per hour (652 kilometers per hour). This was not a record flight, and did not meet the requirements of any official speed record.

Several changes were made before the design was finalized for production. Fuel tanks were removed from the wings to make room for six Browning AN-M2 .50-caliber machine guns and ammunition. A new tank was placed in the fuselage ahead of the cockpit. This moved the cockpit rearward and lengthened the nose.

On 11 July 1940, the XF4U-1 was low on fuel. Rather than returning to Bridgeport, test pilot Boone Tarleton Guyton made a precautionary landing on a golf course at Norwich, Connecticut. The grass was wet from rain and the prototype ran into the surrounding trees. Guyton was not injured, but 1443 was seriously damaged. Vought-Sikorsky repaired it and it returned to flight testing about two months later.

Vought-Sikorsky F4U-1 Corsair, Bu. No. 2170, with test pilot Willard Bartlett Boothby, 24 October 1942. (Rudy Arnold Collection/National Air and Space Museum NASM-XRA-1294)

The production F4U-1 Corsair had a length of 33 feet, 4.125 inches (10.163 meters), wingspan of 40 feet, 11.726 inches (12.490 meters) and overall height (to top of propeller arc) of 15 feet, 0.21 inches (4.577 meters). The wing had 2° incidence at the root. The outer wing had a dihedral of 8.5°, and the leading edges were swept back 4°10′. With its wings folded, the width of the F4U-1 was 17 feet, 0.61 inches (5.197 meters), and gave it a maximum height of 16 feet, 2.3 inches (4.935 meters). When parked, the Corsair’s 13 foot, 4 inch (4.064 meter) propeller had 2 feet, 1.93 inches (65.862 centimeters) ground clearance, but with the fighter’s thrust line level, this decreased to just 9.1 inches (23.1 centimeters).

Vought-Sikorsky F4U-1 Corsair, 1942. (U.S. Navy)

During fight testing of a production F4U-1 Corsair with a Pratt & Whitney R-2800-8 (Double Wasp SSB2-G) engine installed, armed with machine guns with 360 rounds of ammunition per gun, the fighter reached a maximum speed of 395 miles per hour (635.7 kilometers per hour) in level flight at 22,800 feet (6,949 meters), using Military Power. The service ceiling was 38,400 feet (11,704 meters).

A total of 12,571 Corsairs were manufactured the Vought-Sikorsky Aircraft Division (F4U-1), Goodyear Aircraft Corporation (FG-1D) and Brewster Aeronautical Corporation (F3A-1). The Corsair served the U.S. Navy and Marine Corps in World War II and the Korean War. Corsairs also served in other countries’ armed forces. Its last known use in combat was in Central America in 1969.

Vought-Sikorsky F4U-1 Corsair, 1942. (U.S. Navy)

¹ corsair: noun, cor-sair. A pirate, or privateer (especially along the Barbary Coast of the Mediterranean Sea); a fast ship used for piracy.

© 2018, Bryan R. Swopes

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