18 septembre 2019 | International, Aérospatial

Pratt Defining Engine Upgrade Package For Block 5 F-35

Steve Trimble

Pratt & Whitney is defining a new engine upgrade option for Block 5 F-35s delivered starting in the 2030s, says Matthew Bromberg, president of Military Engines.

The upgrades, the details of which will be defined in about six months, are focused on improvements to the fan and the engine accessories, Bromberg told Aerospace DAILY during a Sept. 17 interview on the sidelines of the Air Force Association's Air, Space and Cyber Conference.

The intent is to deliver options for improving thrust by more than 10-12%, reducing fuel consumption by more than 5-6%, increasing vertical lift by about 2% and increasing overall power and thermal management capacity, Bromberg says.

Those targets are the proposed baseline improvements advertised for the Growth Option 2.0 upgrade, which remains in discussions for insertion in Block 4.4 aircraft delivered starting in 2028, he says.

P&W originally proposed a Growth Option 1.0 upgrade package that offered only thrust and fuel improvements, but no extra capacity for power generation and cooling.

“We found it didn't resonate because it didn't have power and thermal management,” Bromberg says.

The Growth Option and Engine Enhancement Package upgrades all stem from technologies developed under the Adaptive Engine Technology Program, which is funded by the Air Force Research Laboratory to design a new engine core.

Pratt & Whitney completed the detailed design review of the XA101 demonstrator engine recently, Bromberg says.

https://aviationweek.com/defense/pratt-defining-engine-upgrade-package-block-5-f-35

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