Vought F-8 Crusader

The Vought F-8 Crusader (originally F8U) was a single-engine, supersonic, carrier-based air superiority jet aircraft designed and produced by the American aircraft manufacturer Vought. It was the last American fighter that had guns as the primary weapon, earning it the title "The Last of the Gunfighters".

Development of the F-8 commenced after release of the requirement for a new fighter by the United States Navy in September 1952. Vought's design team, led by John Russell Clark, produced the V-383, a relatively unorthodox fighter that possessed an innovative high-mounted variable-incidence wing, an area-ruled fuselage, all-moving stabilators, dog-tooth notching at the wing folds for improved yaw stability, and liberal use of titanium throughout the airframe. During June 1953, Vought received an initial order to produce three XF8U-1 prototypes of its design. On 25 March 1955, the first prototype performed its maiden flight. Flight testing proved the aircraft to be relatively problem-free. On 21 August 1956, U.S. Navy pilot R.W. Windsor attained a top speed of 1,015 mph; in doing so, the F-8 became the first jet fighter in American service to reach 1,000 mph.

During March 1957, the F-8 was introduced into regular operations with the US Navy. In addition to the Navy, the type was also operated by the United States Marine Corps (replacing the Vought F7U Cutlass), the French Navy, and the Philippine Air Force. Early on, the type experienced an above-average mishap rate, being somewhat difficult to pilot. American F-8s saw active combat during the Vietnam War, engaging in multiple dogfights with MiG-17s of the Vietnam People's Air Force as well as performing ground attack missions in the theatre. The RF-8 Crusader was a photo-reconnaissance model. It played a crucial role in the Cuban Missile Crisis, providing essential low-level photographs of Soviet medium range ballistic missiles (MRBMs) in Cuba that were impossible to acquire by other means at that time. Several modified F-8s were used by NASA for experimental flights, including the testing of digital fly-by-wire technology and supercritical wing design. The RF-8 operated in U.S. service longer than any of the fighter versions; the United States Navy Reserve withdrew its remaining aircraft during 1987.

During September 1952, the United States Navy released a requirement calling for a new fighter. Specifics of this requirement included a maximum speed of Mach 1.2 at 30,000 ft (9,100 m) with a climb rate of 25,000 ft/min (130 m/s), and a landing speed of no more than 100 mph (160 km/h). Experience gained during the Korean War had demonstrated that .50 caliber (12.7 mm) machine guns were no longer sufficient armament and, as a result, the new fighter was to be armed with 20 mm (0.79 in) cannon. The 20x110mm round had become common in the U.S. Navy prior to the Korean conflict, used on the McDonnell F2H Banshee, F9F, F3D Skyknight, F7U Cutlass, and the F4D, among others.

In response to the requirement, the American aircraft manufacturer Vought opted to produce a new design, internally designated as the V-383. Vought's design team was led by John Russell Clark. It was relatively unorthodox for a fighter, possessing a high-mounted wing which necessitated the use of a short and lightweight landing gear in the fuselage. A major contributing factor that facilitated the use of such compact main gear, however, was the variable-incidence wing (not to be confused with a variable-sweep wing, another form of variable geometry wing designed for similar purposes) which reduced the amount of pitch up required while in landing configuration at low speeds, an extremely nose high attitude being a common characteristic of the highly swept and low aspect ratio wings used on many fighters of the era. This innovative wing pivoted upwards by 7° in takeoff and landing configuration, and by doing so, increased the angle of attack of the wing without requiring the entire aircraft to pitch up, which allowed for greater forward visibility and a suitably slow landing speed. The variable-incidence wing helped the F-8's development team win the Collier Trophy in 1956.

Considerable competition for the requirement also emerged. This included the Grumman F-11 Tiger, the upgraded twin-engine McDonnell F3H Demon (the F3H-H, which would eventually become the McDonnell Douglas F-4 Phantom II), and the North American F-100 Super Sabre hastily adapted to carrier use and dubbed the "Super Fury". In addition to the fighter-orientated V-383 proposal, Vought also presented a tactical reconnaissance version of the aircraft, internally designated as the V-392.

During May 1953, Vought's submission was declared to be the winner; one month later, the company received an initial order for three XF8U-1 prototypes (after adoption of the unified designation system in September 1962, the F8U became the F-8). On 25 March 1955, the first prototype performed its maiden flight with John Konrad at the controls; confidence was such that it was decided to exceed the speed of sound during its maiden flight. The development was relatively trouble-free, to the extent that the second prototype and the first production F8U-1 made their first flights together on the same day, 30 September 1955. On 4 April 1956, the F8U-1 performed its first catapult launch from Forrestal.

Beginning in late 1956, prototype XF8U-1s were evaluated by VX-3, during which few problems were noted. Weapons development was conducted at Naval Air Weapons Station China Lake and a China Lake F8U-1 set a U.S. National speed record in August 1956. Commander "Duke" Windsor set a new Level Flight Speed Record of 1,015.428 mph (1,634.173 km/h) on 21 August 1956 beating the previous record of 822 mph (1,323 km/h) set by a USAF F-100. (It did not break the world speed record of 1,132 mph (1,822 km/h), set by the British Fairey Delta 2, on 10 March 1956.)