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XA101

Commentary

Air Force Risks Sub-Optimizing Fighter Engines—Again 

June 27, 2023 | By Col. Leonard “Lucky” Ekman, USAF (Ret.) 
“The F-35 is the most advanced fighter yet built, but decisions and compromises imposed on it more than a decade ago continue to push up its cost, decrease its reliability, limit its performance, and constrain its ability to exploit new technologies. For fighter pilots of ...

GAO Urges Congress to Separate Engine Upgrade From F-35 Program

May 31, 2023 | By John A. Tirpak
Congress should direct the Pentagon to break out the F-35’s propulsion upgrade from the rest of the program to better to track its scope, schedule, and cost, the Government Accountability Office urged in a new May 30 report. Meanwhile, engine-maker Pratt & Whitney added its ...

Air Force Skips AETP Engines for F-35, Presses on with NGAP

March 14, 2023 | By John A. Tirpak
The Air Force couldn't find a place for Adaptive Engine Technology Program powerplants on the F-35 in its fiscal 2024 budget request, opting to harvest what it can from its $4 billion investment and press on to the Next-Generation Advanced Propulsion program.

Dozens of Lawmakers Urge Pentagon to Move Forward With Adaptive Engines

Oct. 11, 2022 | By Greg Hadley
Nearly 50 members of Congress have urged Defense Secretary Lloyd J. Austin III to fund a new phase of development for advanced fighter engines in the fiscal 2024 budget, sending a letter to the Pentagon on Oct. 7. The letter, signed by 49 lawmakers from ...

GE’s AETP Engine Completes Milestone Tests as Air Force Faces Decision on F-35

Sept. 14, 2022 | By Chris Gordon
GE Aviation announced that it completed milestone tests for the engine it hopes will power Air Force fighters well into the future. GE calls its offering in the Adaptive Engine Transition Program the XA100, and the company hopes the Air Force will soon select it ...

Pratt Testing XA101 Adaptive Engine, Has Two Offerings for F-35 Propulsion

Oct. 1, 2021 | By John A. Tirpak
Pratt & Whitney is testing its Adaptive Engine Technology Program XA101 powerplant and has already demonstrated the objective goals for the program, company military engines president Matthew Bromberg said. He estimates that up to 70 percent of the technology could be fitted to improve fighter ...

GE Says New Engine for F-35 Possible by 2027, but Not on STOVL Version

Sept. 10, 2021 | By John A. Tirpak
Engine makers should be able to meet House defense policy bill language calling for a new F-35 powerplant based on the Adaptive Engine Transition Program by 2027, but only for the conventional takeoff versions, a GE Aviation executive said. “We would be eager to step ...

Pratt Pushes Alternative to New Adaptive Engine for F-35

Sept. 9, 2021 | By John A. Tirpak
Modifications Pratt & Whitney is proposing to its F135 engine can improve thrust and efficiency and would be far less costly than giving the F-35 fighter a new powerplant developed through the Adaptive Engine Transition Program, the engine maker said.
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