Pratt wins $1.04 billion U.S. deal for F-35 fighter engines


Mon Apr 11, 2016 7:00pm EDT

Pratt & Whitney, a unit of United Technologies Corp, has won an additional $1.04 billion contract for F-35 fighter jet engines, bringing the total value of its work on a ninth batch of the engines to $1.4 billion, the Pentagon said on Monday.

The contract announced on Monday finalizes part of an agreement in principle that Pratt reached with the U.S. Defense Department in January for more than $3.0 billion in two separate contracts – a ninth batch of 66 F135 engines and a 10th batch of 101 engines.

The $1.04 billion contract comes on top of $360 million in funding that had already been awarded to Pratt to sustain the F135 engine production line.

Pratt said the deal would further reduce the cost of the engines it builds for the Lockheed Martin Corp fighter jets, with further cost reductions to be included in the contract for the 10th batch of jets.

The company said the contract includes 53 conventional takeoff and landing (CTOL) engines and 13 short takeoff and vertical landing (STOVL) propulsion systems for the U.S. Air Force, Navy and Marine Corps, and five other countries – Italy, Norway, Israel, Japan and Britain.

Mark Buongiorno, vice president of Pratt’s F135 engine program, said the F135 engine’s reliability rate was already over 90 percent, well ahead of a key 2020 requirement.

“We remain laser-focused on reducing costs, meeting our delivery schedule commitments, ensuring dependable engine performance, and preparing for global sustainment of the F-35 fleet,” he said in a statement.

To date, Pratt & Whitney has delivered 273 production engines for the advanced new stealth fighter.

Production of the engines in the ninth batch is already underway, with the first engines due to begin in the second quarter.

Pratt said it was working with the Pentagon’s F-35 program office to finalize a contract for the 10th batch of jet engines by the end of April.

(Reporting by Eric Walsh and Andrea Shalal; Editing by Eric Beech and Diane Craft)

Original post


PW F135 engines

Two-shaft engine design of the F135 and variations

F-35 Engine

Both the conventional and carrier engines are largely similar and produce almost identical results, with a maximum wet thrust of 43,000lbf and a dry thrust of 28,000lbf.

The F135 is a two-shaft engine featuring a three-stage fan and six-stage high pressure compressor. The hot section comprises an annular combustor with a single-stage high pressure turbine unit and a two-stage low pressure turbine. The engine’s afterburner also features a variable converging-diverging nozzle.

Three engine variants have been designed; the F135-PW-100 and F135-PW-400 for use aboard the conventional and carrier versions of the aircraft respectively, and the F135-PW-600 for the STOVL variation. Both the conventional and carrier engines are largely similar and produce almost identical results, with a maximum wet thrust of 43,000lbf and a dry thrust of 28,000lbf. The major difference is the use of salt-corrosion resistant materials in the carrier variant.

The STOVL engine, however, is capable of producing different results courtesy of its design and the demands placed upon it. Source


Specifications (F135-PW-100)

Data from

General characteristics

  • Type: afterburning turbofan
  • Length: 220 in (559 cm)
  • Diameter: 46 in (120 cm) max., 43 in (110 cm) fan inlet
  • Dry weight: 3,750 lb (1,700 kg)



Specifications (F135-PW-600)

Data from

General characteristics

  • Type: Afterburning Turbofan with shaft driven remote lift fan
  • Length: 369 in (937.3 cm)
  • Diameter: 46 in (116.8 cm) maximum, 43 in (109.2 cm) fan inlet, 53 in (134.6 cm) lift fan inlet
  • Dry weight:




See related post:

Israel is seeking to gain greater autonomy in its participation and design of its F-35I

Pentagon to move ahead with $3 billion F-35 upgrade program in 2018

Skunk Works pushes investment in F-22 and F-35 over new aircraft

USAF Moves from F-22 to New F-X Program

Israel reconsidering 2008 purchase of U.S. jets – the much-touted JSF has some inherent flaws

Defence Canada to stay in program of F-35 jet buyers despite pledge to withdraw

Asia Pacific market may see another 100 orders of the F-35 Joint Strike Fighter over the coming years

Belgium will issue a request for proposals (RFP) this summer for a replacement of its F-16A/B fleet

The U.S. May Build 500 Jets Before Finding Out If the F-35 Works

See details of F-35: HERE


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