North American XF-108 Rapier




Title:
North American XF-108 Rapier

Description:
The North American XF-108 Rapier was a proposed American design for a long-range, high-speed interceptor aircraft to defend the United States and Canada from supersonic Soviet bombers. The F-108 had a very large "cranked" delta wing, with a 58° sweep angle at the leading edge and wingtip extensions of about 40°, with a 4° anhedral. There were fixed ventral stabilizers on the wings, mounted at mid-span, and a tall all-moving vertical tailfin, supplemented by two ventral stabilizers that extended when the landing gear retracted. Although some earlier versions of the design had had separate tailplanes and later forward canards, both were abandoned in the final design. There were two General Electric J93 turbojet engines, also used in North American's XB-70 Valkyrie bomber, in the fuselage; USAF requests for an alternate installation of the Pratt & Whitney J58 later used in the SR-71 came to naught. The engines were fed by side-mounted intakes with a shape very similar to the later North American A-5 Vigilante. The large fuselage and wing had nine tanks for a total of 7,109 gallons (26,911 liters) of JP-6 fuel, giving an estimated combat radius of some 1,271 mi (2,033 km), which could be extended by in-flight refueling. Top speed was estimated at 1,980 mph (3,190 km/h), about Mach 3, at 72,800 ft (22,200 m). It was stressed for +5.33/-3.00 g. The aircraft had a crew of two, a pilot and a weapon systems officer (WSO), in a tandem cockpit arrangement. Each crewman had an escape capsule designed to permitting safe ejection even at extreme speeds and altitudes. The weapon systems operator in the rear seat had no flight controls. The F-108 was intended to carry the Hughes AN/ASG-18 radar, the U.S.'s first pulse doppler radar set. It was to have look-down/shoot-down capability, but could only track one target at a time. It was a massive 2,100 lb (950 kg) installation filling most of the long nose. The radar was paired with an infrared search and track (IRST) system on the wing leading edges.

Author:
jaglavaksoldier

Tags:
North, American, XF-108, Rapier, interceptor, aircraft, USAF, Mach,

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