n 1996, the U.S. Department of Defense awarded Boeing a four-year contract for the concept demonstration phase of the Joint Strike Fighter, or JSF, program competition. The goal was to develop a low-cost, multirole tactical aircraft for the U.S. Air Force, Navy and Marine Corps, and the United Kingdom's Royal Navy and Royal Air Force.
As part of the contract, Boeing was required to build concept demonstration aircraft that would validate the company's approach to commonality; low-speed handling qualities and carrier approach; and short-takeoff-and vertical-landing, or STOVL, hover and transition between conventional and vertical flight.
Boeing assembled two concept demonstration aircraft, X-32A and X-32B, at its plant in Palmdale, Calif.
On Sept. 18, 2000, the X-32A made its first flight from Palmdale to Edwards Air Force Base, Calif. The X-32A demonstrated conventional takeoff and landing characteristics for the Air Force as well as carrier approach flying qualities for the Navy. The aircraft made 66 flights during four months of testing. The flights validated the aircraft's handling qualities for inflight refueling, weapons bay operations and supersonic flight.
The X-32B aircraft made its first flight on March 29, 2001. It made 78 test flights in four months, including a transcontinental ferry flight from Edwards Air Force Base to Naval Air Station Patuxent River, Md. The aircraft successfully transitioned to and from STOVL flight mode by using its direct-lift system to redirect thrust from the aircraft's cruise nozzle to the lift nozzles. The X-32B also demonstrated its ability to hover and make vertical landings.
The flight tests, which ended in July 2001, demonstrated matching of actual flight performance with computer predictions based on years of simulation, an accomplishment that had never before been achieved.
Although not selected for full-scale development of the JSF, Boeing viewed its involvement in the competition as a strategic investment. The program yielded many advances in stealth technology and design and manufacturing methods. These achievements have been applied to other Boeing programs including the F/A-18E/F Super Hornet and the X-45A Unmanned Combat Air Vehicle, or UCAV.
Specifications
First flight: X-32A, Sept. 18, 2000; X-32B, March 29, 2001
Military model numbers: X-32A and X-32B
Classification: Concept demonstration aircraft
Span: X-32A, 36 feet; X-32B, 30 feet
Length: X-32A, 45 feet; X-32B, 43 feet 8.6 inches
Takeoff weight: 50,000 pounds
Speed: Supersonic
Service ceiling: 50,000 feet
Range: 600 to 850 nautical-mile-radius (internal fuel only)
Power: One Pratt & Whitney JSF-119-PW-614 turbofan producing thrust in excess of 42,000 pounds
Accommodation: One pilot
موضوع: الشبحان وذات الاقلاع العمودي فيديو 
الثلاثاء 14 سبتمبر 2010 - 10:57
