FARNBOROUGH, ENGLAND -- Although the $4.8 billion system design and development contract Pratt & Whitney was awarded to support the F-35 Joint Strike Fighter calls only for 34 engines, the company will actually deliver more than 300 F135 engines to the program before rival engines are available, a senior P&W official said last week. The SDD contract P&W was awarded calls for development and delivery of 20 flight test engines and 14 ground test variants. But the company has such...