Vought F6U Pirate

Last updated
F6U Pirate
F6U-1 Pirate NATC in flight.jpg
Role Fighter aircraft
Manufacturer Chance Vought
First flight2 October 1946
StatusCancelled in 1950
Primary user United States Navy (Intended)
Number built33

The Vought F6U Pirate was the Vought company's first jet fighter, designed for the United States Navy during the mid-1940s. Although pioneering the use of turbojet power as the first naval fighter with an afterburner and composite material construction, the aircraft proved to be underpowered and was judged unsuitable for combat. None were ever issued to operational squadrons and they were relegated to development, training, and test roles before they were withdrawn from service in 1950.

Contents

Design and development

An XF6U-1 without afterburner. F6U NAN1-48.jpg
An XF6U-1 without afterburner.

A specification was issued by the Navy's Bureau of Aeronautics (BuAer) for a single-seat, carrier-based fighter powered by a Westinghouse 24C (later J34) axial turbojet on 5 September 1944. Chance Vought was awarded a contract for three V-340 (company designation) prototypes on 29 December 1944. [1]

The XF6U was a small aircraft with tricycle undercarriage and with straight wings and tail surfaces. The wings were short enough that they did not need to fold. To fit more aircraft into crowded hangars, the nose gear could be retracted and the aircraft's weight would rest on a small wheel attached by the ground crew. This raised the tail up so that it could overlap the nose of the aircraft behind it, allowing more aircraft to fit into available hangar space. The turbojet engine was mounted in the rear fuselage and was fed by ducts in each wing root. [2]

The most unusual feature of the aircraft was its use of "Metalite" for its skin. This was made of balsa, sandwiched between two thin sheets of aluminum. "Fabrilite" was also used for the surfaces of the vertical stabilizer and rudder; this was similar to Metalite but used fiberglass instead of aluminum. Two fuel tanks were fitted in the center of the fuselage; the forward tank, ahead of the wing, contained 220 US gallons (830 L; 180 imp gal) and the rear tank, 150 US gallons (570 L; 120 imp gal). These were supplemented by two jettisonable 140-US-gallon (530 L; 120 imp gal) tip tanks. The cockpit was well forward and was provided with a bubble canopy which gave the pilot good visibility. He was provided with a Mk 6 lead-computing gyro gunsight. Underneath the cockpit were four 20 mm (0.79 in) M3 autocannon. Their 600 rounds of ammunition were carried behind the pilot. The empty casings of the two upper guns were retained in the aircraft, while those from the two lower guns were ejected overboard. [3]

After a company-wide contest to name the aircraft, the initial prototype received the name Pirate and made its first flight on 2 October 1946. Flight testing revealed severe aerodynamic problems, mostly caused by the airfoil section and thickness of the wing. The vertical stabilizer also had to be redesigned to smooth out the airflow at the intersection of the horizontal and vertical stabilizers. Other changes included the addition of dive brakes on the sides of the fuselage and the replacement of the Metalite panels near the engine exhaust with stainless steel ones. [4]

The first XF6U-1 prototype was powered by a Westinghouse J34-WE-22 turbojet with 3,000 lbf (13.34 kN) thrust, one third of the weight of the aircraft. To help improve the underpowered aircraft's performance, the third prototype, which first flew on 10 November 1947, was lengthened by 8 feet (2.4 m) to use a Westinghouse J34-WE-30 [5] afterburning engine of 4,224 lbf (18.78 kN) thrust, the first United States Navy fighter to have such a powerplant. [6]

Operational history

In 1947, before the flight testing of the prototypes was completed, 30 production aircraft were ordered. They incorporated an ejection seat and a redesigned vertical stabilizer as well as two auxiliary fins, one towards the tip on each side of the tailplane in an attempt to improve the directional stability of the aircraft. The fuselage was lengthened to fit additional equipment and the wing had fillets added at the rear junction with the fuselage. [7]

During the production run, the Navy decided to move the Chance Vought factory from Stratford, Connecticut, to a much larger facility in Dallas, Texas, which had been vacant since the end of World War II; this badly disrupted the production of the Pirate. The airframes were built in Stratford and trucked to Dallas, where government-furnished equipment, such as the engines and afterburners, were installed. The completed aircraft were then taxied around the new plant's airfield, but the runway was deemed too short to handle jets. The aircraft had to be disassembled and trucked to an abandoned airfield at Ardmore, Oklahoma, with a runway long enough for acceptance testing. [8]

The first production F6U-1 performed its initial flight on 29 June 1949, and 20 of the aircraft were provided to VX-3, an operational evaluation squadron based at Naval Air Station Patuxent River in Maryland. [9] The judgment from the evaluation was that the Pirate was unacceptable for operational use. [10] Naval aviators disparagingly called the F6U the "groundhog". [11] On 30 October 1950, BuAer informed Vought of the Navy's opinion of the Pirate in terms both bureaucratic and scathing: "The F6U-1 had proven so sub-marginal in performance that combat utilization is not feasible." [12]

The aircraft ended up being used primarily to develop arresting gear and barriers, but were used operationally for a short time by at least one Texas-based United States Naval Reserve squadron as they transferred to jets. [10] The 30 production aircraft had only a total of 945 hours of flight time, 31.5 hours each. Some aircraft flew only six hours which was enough for little more than their acceptance flight and the flight to their disposition. [13] The downfall of the aircraft was that it was underpowered and was at times considered "sub-marginal", not an unusual problem with jets of the era. [14]

Variants

Operators

Flag of the United States.svg  United States

Survivors

Although the F6U had a very short operational career, one example remains intact (122479, Vought production number 2) and has undergone restoration by the Vought Aircraft Heritage Foundation, at the Vought plant in Grand Prairie, Texas. As of 2012, the aircraft is currently at the National Naval Aviation Museum in Pensacola Florida. [14]

Specifications (F6U-1)

Vought F6U Pirate 3-view line drawing.svg

Data fromThe Complete Book of Fighters [10]

General characteristics

Performance

Armament

See also

An F6U (foreground) with its competitors FH Phantom (middle) and F2H Banshee (rear). F6U FH and F2H in flight.jpg
An F6U (foreground) with its competitors FH Phantom  (middle) and F2H Banshee  (rear).

Aircraft of comparable role, configuration, and era

Related lists

Related Research Articles

<span class="mw-page-title-main">McDonnell FH Phantom</span> Early US twinjet fighter aircraft

The McDonnell FH Phantom is a twinjet fighter aircraft designed and first flown during World War II for the United States Navy. The Phantom was the first purely jet-powered aircraft to land on an American aircraft carrier and the first jet deployed by the United States Marine Corps. Although only 62 FH-1s were built it helped prove the viability of carrier-based jet fighters. As McDonnell's first successful fighter, it led to the development of the follow-on F2H Banshee, which was one of the two most important naval jet fighters of the Korean War; combined, the two established McDonnell as an important supplier of navy aircraft.

<span class="mw-page-title-main">McDonnell XF-88 Voodoo</span> Prototype fighter aircraft

The McDonnell XF-88 Voodoo was a long-range, twinjet fighter aircraft with swept wings designed for the United States Air Force. Although it never entered production, its design was adapted for the subsequent supersonic F-101 Voodoo.

<span class="mw-page-title-main">McDonnell F2H Banshee</span> American carrier-based jet fighter

The McDonnell F2H Banshee is a single-seat carrier-based jet fighter aircraft designed and produced by the American aircraft manufacturer McDonnell Aircraft. It was an early jet fighter operated by United States Navy and United States Marine Corps, as well as being the only jet-powered fighter to ever be deployed by the Royal Canadian Navy. The aircraft's name is derived from the banshee of Irish mythology.

<span class="mw-page-title-main">McDonnell F3H Demon</span> US Navy fighter aircraft

The McDonnell F3H Demon is a subsonic swept-wing carrier-based jet fighter aircraft designed and produced by the American manufacturer McDonnell Aircraft Corporation. It was the first swept wing jet fighter and the only single-engined carrier-based fighter the company produced.

<span class="mw-page-title-main">Douglas F3D Skyknight</span> U.S. twinjet night fighter aircraft (1951–1970)

The Douglas F3D Skyknight is an American twin-engined, mid-wing jet fighter aircraft designed and manufactured by the Douglas Aircraft Company.

<span class="mw-page-title-main">Douglas F4D Skyray</span> US carrier-based jet-powered interceptor

The Douglas F4D Skyray is an American carrier-based fighter/interceptor designed and produced by the Douglas Aircraft Company. It was the last fighter produced by the Douglas Aircraft Company prior to its merger with McDonnell Aircraft to become McDonnell Douglas.

<span class="mw-page-title-main">Northrop YF-17</span> Prototype fighter aircraft for the US military

The Northrop YF-17 was a prototype lightweight fighter aircraft designed by Northrop aviation for the United States Air Force's Lightweight Fighter (LWF) technology evaluation program. The LWF was initiated because many in the fighter community believed that aircraft like the F-15 Eagle were too large and expensive for many combat roles. The YF-17 was the culmination of a long line of Northrop designs, beginning with the N-102 Fang in 1956, continuing through the F-5 family.

<span class="mw-page-title-main">Convair F2Y Sea Dart</span> Hydroski jet fighter, U.S. Navy, 1953

The Convair F2Y Sea Dart was an American seaplane fighter aircraft that rode on twin hydro-skis during takeoff and landing. It flew only as a prototype, and never entered mass production. It is the only seaplane to have exceeded the speed of sound.

<span class="mw-page-title-main">Ryan FR Fireball</span> American World War II-era jet and piston-engined fighter aircraft

The Ryan FR Fireball was an American mixed-power fighter aircraft designed by Ryan Aeronautical for the United States Navy during World War II. It was the Navy's first aircraft with a jet engine. Only 66 aircraft were built before Japan surrendered in August 1945. The FR-1 Fireball equipped a single squadron before the war's end, but did not see combat. The aircraft ultimately proved to lack the structural strength required for operations aboard aircraft carriers and was withdrawn in mid-1947.

<span class="mw-page-title-main">Ryan XF2R Dark Shark</span> Experimental aircraft built for the United States Navy

The Ryan XF2R Dark Shark was an American experimental aircraft built for the United States Navy that combined turboprop and turbojet propulsion. It was based on Ryan Aeronautical's earlier FR Fireball, but replaced the Fireball's piston engine with a turboprop engine.

<span class="mw-page-title-main">Vought F7U Cutlass</span> US Navy carrier-based fighter-bomber aircraft in service 1951–1959

The Vought F7U Cutlass is a United States Navy carrier-based jet fighter and fighter-bomber designed and produced by the aircraft manufacturer Chance Vought. It was the first tailless production fighter in the United States as well as United States Navy's first jet equipped with swept wings and the first to be designed with afterburners.

<span class="mw-page-title-main">Lockheed XF-90</span> Experimental aircraft

The Lockheed XF-90 was built in response to a United States Air Force requirement for a long-range penetration fighter and bomber escort. The same requirement produced the McDonnell XF-88 Voodoo. Lockheed received a contract for two prototype XP-90s. The design was developed by Willis Hawkins and the Skunk Works team under Kelly Johnson. Two prototypes were built. Developmental and political difficulties delayed the first flight until 3 June 1949, with Chief Test Pilot Tony LeVier at the controls. Embodying the experience gained in developing the P-80 Shooting Star, the XF-90 shared some design traits with the older Lockheed fighter, albeit with swept-wings; however, this latter design choice could not sufficiently make up for the project’s underpowered engines, and the XF-90 never entered production.

<span class="mw-page-title-main">Grumman XF10F Jaguar</span> Type of aircraft

The Grumman XF10F Jaguar was a prototype swing-wing fighter aircraft offered to the United States Navy in the early 1950s. Although it never entered service, its research paved the way toward the later General Dynamics F-111 and Grumman's own F-14 Tomcat.

<span class="mw-page-title-main">Yakovlev Yak-19</span> Soviet prototype fighter aircraft

The Yakovlev Yak-19 was a prototype Soviet fighter built in late 1940s. It was the first Soviet aircraft to be equipped with an afterburning turbojet, the Klimov RD-10F that was derived from the German Jumo 004 engine. Only two examples were built as it was rejected for service by the Soviet Air Force.

<span class="mw-page-title-main">Westinghouse J40</span>

The Westinghouse J40 was an early high-performance afterburning turbojet engine designed by Westinghouse Aviation Gas Turbine Division starting in 1946 to a US Navy Bureau of Aeronautics (BuAer) request. BuAer intended to use the design in several fighter aircraft and a bomber. However, while an early low-power design was successful, attempts to scale it up to its full design power failed, and the design was finally abandoned, deemed a "fiasco" and a "flop".

<span class="mw-page-title-main">Arsenal VG 90</span> French prototype jet airplane

The Arsenal VG 90 was a French carrier-based jet-engined interceptor developed in the late 1940s. It was intended to compete for an Aéronavale contract and first flew in 1949. It set a speed record for a French aircraft the following year, but both of the completed prototypes were destroyed in fatal crashes and the program was cancelled in 1952 before the third prototype was finished. The Aéronavale contract was eventually awarded to a license-built British aircraft. The remains of the last VG 90 were scrapped in 1978.

<span class="mw-page-title-main">North American FJ-1 Fury</span> First US Navy jet aircraft

The North American FJ-1 Fury was an early turbojet-powered carrier-capable fighter aircraft used by the United States Navy (USN). Developed by North American Aviation (NAA) starting in 1945, it became the first jet aircraft in USN service to serve at sea under operational conditions. The FJ-1 was an early transitional jet of limited success which carried over similar tail surfaces, wing, and canopy derived from the piston-engined P-51D Mustang. The evolution of the design to incorporate swept wings would become the basis for the land-based XP-86 prototype - itself originally designed with a very similar straight-wing planform to the FJ-1 airframe - of the United States Air Force's enormously influential F-86 Sabre, which in turn formed the basis for the Navy's carrier-based North American FJ-2/-3 Fury.

<span class="mw-page-title-main">Westinghouse J34</span> Turbojet engine

The Westinghouse J34, company designation Westinghouse 24C, was a turbojet engine developed by Westinghouse Aviation Gas Turbine Division in the late 1940s. Essentially an enlarged version of the earlier Westinghouse J30, the J34 produced 3,000 pounds of thrust, twice as much as the J30. Later models produced as much as 4,900 lb with the addition of an afterburner. It first flew in 1947. The J46 engine was developed as a larger, more powerful version of Westinghouse's J34 engine, about 50% larger.

<span class="mw-page-title-main">Westinghouse J46</span> Turbojet aircraft engine family

The Westinghouse J46 is an afterburning turbojet engine developed by the Westinghouse Aviation Gas Turbine Division for the United States Navy in the 1950s. It was primarily employed in powering the Convair F2Y Sea Dart and Vought F7U Cutlass. The engine also powered the land speed-record car known as the Wingfoot Express, designed by Walt Arfons and Tom Green It was intended to power the F3D-3, an improved, swept-wing variant of the Douglas F3D Skyknight, although this airframe was never built.

<span class="mw-page-title-main">Vought YA-7F</span> Type of aircraft

The Vought YA-7F "Strikefighter" is a prototype transonic attack aircraft based on the subsonic A-7 Corsair II. Two prototypes were converted from A-7Ds. The YA-7F was not ordered into production, its intended role being filled by the F-16 Fighting Falcon.

References

  1. Koehnen 1983, p. 2.
  2. Koehnen 1983, p. 3.
  3. Koehnen 1983, pp. 3, 6.
  4. Koehnen 1983, pp. 6–7, 11.
  5. "Westinghouse J 34-WE-48: The X-power." Archived 2007-10-16 at the Wayback Machine Arkansas Air Museum. Retrieved: 7 October 2007.
  6. Green and Swanborough 1998, p. 587.
  7. Koehnen 1983, pp. 12, 14.
  8. Koehnen 1983, pp. 11, 14.
  9. Koehnen 1983, pp. 14, 16.
  10. 1 2 3 Green and Swanborough 1998, p. 588.
  11. O'Rourke, G.G, Capt USN. "Of Hosenoses, Stoofs, and Lefthanded Spads". United States Naval Institute Proceedings, July 1968
  12. 1 2 Koehnen 1983, p. 15.
  13. Koehnen 1983, p. 16.
  14. 1 2 "F6U Pirate/122479." National Naval Aviation Museum. Retrieved: 27 January 2015.
  15. Koehnen 1983, p. 11.
  16. 1 2 Swanborough and Bowers 1990, p. 533.

Bibliography

Further reading