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"The F119 engine began ground testing in December 1992. Difficulties revealed in ground testing included performance shortfalls in the fan and turbine and high stresses in the second fan blade and low-pressure turbine blade"
"The Preliminary Design Review (PDR), a major program milestone, was reached in the spring of 1993. Critical Design Review (CDR), the final major milestone before assembly began, was completed in 1995. The purpose of the review was to ensure that all performance and functional requirements had been incorporated into the design of the F-22; to verify that required development tasks involving detailed design had been completed; and to confirm the program meets all necessary criteria to proceed into the next development phase, fabrication and assembly"
- это по отношению целого Ф-22, для ПАК-ФА такое имело место в 2006-ом году.
"The first two Pratt & Whitney F119 engines were installed in the first aircraft in December 1996."
"By mid-1999 the program had completed only five percent of the required testing. The advanced sensors and avionics (perhaps the highest risk elements of the program) had not been tested on the F-22 at all."
"On 05 February 2001 Air Force officials announced the completion of the final two requirements--first flight of Raptor 4006 and initiating radar cross section testing -- which cleared the way for an F-22 production decision."
"Assembly of the first operational F-22 Raptor fighter began in March 2001. The F-22A Raptor achieved Initial Operational Capability [IOC] on 15 December 2005"
Вообще это цитаты из globalsecurity.org
А я вроде слушал от самих двигателистов что все с военных двигателей ОК.
Ответить с цитированием
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Сообщение от Niki1979
