Design and Development
The XF-88 originated from a 1946 United States Army Air Forces requirement for a long-range "penetration fighter" to escort bombers to their targets. It was to be essentially a jet-powered replacement for the wartime North American P-51 Mustang that had escorted Boeing B-17 Flying Fortress bombers over Germany. It was to have a combat radius of 900 mi (1,450 km) and high performance. McDonnell began work on the aircraft, dubbed Model 36, on 1 April 1946. On 20 June the company was given a contract for two prototypes designated XP-88. Dave Lewis was Chief of Aerodynamics on this project.
The initial design was intended to have straight wings and a V-shaped tail but wind tunnel tests indicated aerodynamic problems that led to a conventional tailplane being substituted and the wings being swept. The USAAF confirmed the order for the two prototypes on 14 February 1947, while a change in designation schemes lead to the unflown prototypes being re-designated XF-88 on 1 July 1948, with the type gaining the nickname "Voodoo".
The Voodoo had a low/mid-mounted wing, swept to 35°. The two engines, specified as Westinghouse J34 turbojets were in the lower fuselage, fed by air intakes in the wing roots and jetpipes beneath the rear fuselage. This made room in the long fuselage for the fuel tanks required for the required long range. The Voodoo's short nose had no radar, being intended to house an armament of six 20 mm (.79 in) M39 cannon, while the fighter's single pilot sat in a pressurised cockpit and was provided with an ejection seat.
Read more about this topic: McDonnell XF-88 Voodoo
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