Lockheed Martin has conducted a fit test of the F-35 Joint Strike Fighter’s (JSF) Pratt & Whitney F135 turbofan engine, as the US Department of Defense appears to have killed off the aircraft’s alternate F136 power plant being developed by General Electric and Rolls-Royce.

Conducted on Lockheed’s Fort Worth assembly line in Texas in early February, the successful fit test (pictured below) comes as a precursor to the F135’s formal integration with the JSF programme’s first system development and demonstration (SDD) phase aircraft in mid-February.

Pratt & Whitney F135 engine fit in JSF W445

Lockheed says it conducted the test installation while it was awaiting the delivery of a wiring harness to fully integrate the engine, and that the power plant is “scheduled for integration within the next couple of weeks”. P&W finished assembly work on the 40,000lb (178kN)-rated F135 last December.

Submitted early this week, the DoD’s fiscal year 2007 budget request excluded any funding for the F136 programme, which has been threatened with cancellation since late last year. The alternate engine is being developed under a $2.4 billion SDD contract placed in August 2005.

P&W F135 engine fit JSF W445

All photos © Lockheed Martin

P&W F135 engine fit on F-35 JSF W445

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Visit Pratt & Whitney's official product page for the F135 range of military engines

Source: Flight International