Pratt & Whitney is confident that the problems with the STOVL version of the F135 engine powering the F-35B have been solved. At the Paris Air Show last week, Chris Flynn, vice president of fifth-generation programs, said that solutions to the lift-fan clutch engagement, driveshaft expansion and roll-post heating were all in production.
Pratt & Whitney F135
The Pentagon issued a “stop work” order for the GE Aviation F136 engine in late March, and the Fiscal Year 2011 U.S. defense budget was finally signed into law last month, without funding for the alternative F-35 engine. But the fight for the F136 is not yet over.
The expected costs to produce and sustain the F-35 Lightning II Joint Strike Fighter in service are “simply unacceptable in this fiscal environment,” according to senior Pentagon officials. Air Force acquisition executive David Van Buren and F-35 Joint Program Office chief Vice Admiral David Venlet told a U.S.
Pratt & Whitney has delivered the first F135 production-standard short takeoff/vertical landing (STOVL) engine to Lockheed Martin for the F-35B Joint Strike Fighter program. The engine manufacturer plans to deliver another 18 STOVL engines next year. Any further design changes will likely be limited to “mostly software tweaks,” a P&W representative told AIN. Meanwhile, the U.S.
Pratt & Whitney and General Electric have bought their high-stakes battle over the provision of an alternative engine for the Lockheed-Martin F-35 Joint Strike Fighter to Farnborough.
Pratt & Whitney’s F135 engine has achieved a first for the Lockheed Martin F-35 program by accelerating the F-35B STOVL version through the sound barrier last month. The test aircraf–BF-2–climbed to 30,000 feet and accelerated to Mach 1.07 at the off-shore test track near NAS Patuxent River in Maryland on June 14. The F-35 has supercruise capability and does not require the use of engine afterburner to achieve supersonic flight.
The U.S. House of Representatives on May 28 voted to retain funding for the F136 engine General Electric and Rolls-Royce are developing for the F-35 as an alternative to the Pratt & Whitney F135. The FY11 Defense Authorization Bill contains $485 million for continuation of the engine, which is around 70 percent through its development program.
The U.S. House armed services seapower and air-land forces subcommittees this week included $485 million in continued funding for the GE/Rolls-Royce F136, an alternative engine for the F-35 Joint Strike Fighter (JSF), in H.R.5136, the National Defense Authorization Bill for Fiscal Year 2011.
If Lockheed Martin is to be believed, there’s not much wrong with the F-35 program. In a briefing here yesterday, vice president F-35 business development Steve O’Bryan stuck doggedly to the company mantra that development is moving right along, with plenty of accomplishments despite the slow pace of flight testing.
The downturn in demand in some of its markets has not dented the ardor of engine maker Pratt & Whitney for developing new technology. “We have to be ready for the upturn,” said the U.S. company’s new president, David Hess. “We have to keep people focused on the great future of Pratt & Whitney, positioning ourselves for a strong recovery.”