XA100 Adaptive Cycle Engine
Outperform. Outpace. Only AETP.
The only option ready to deliver for the U.S. and its Allies.
The only option ready to deliver for the U.S. and its Allies.
A new era of combat propulsion is here. The XA100 adaptive cycle engine – designed, built, and tested through the U.S. Air Force's Adaptive Engine Transition Program (AETP) – defines a revolutionary jump in propulsion capabilities this decade which address the challenges faced from increasing geopolitical threats.
This XA100 is the only engine that allows U.S. warfighters to go further, go faster and fight harder against near-peer adversaries to satisfy the true needs of the U.S. and its Allies for strategic deterrence, today and tomorrow. The technologies developed for the XA100 unlock opportunities for greater power projection, better warfighting posture, and superior operational effectiveness of the F-35 fighter fleet while also creating capacity for near- and long-term growth of the platform.
The adaptive cycle engine provides a high thrust mode for maximum power and high efficiency mode to extend mission range. Automatically alternating between these modes dramatically transforms mission capability and enables unrestricted operations.
Third stream advantage
This advanced capability provides an extra source of cooled air to improve propulsive and fuel efficiency. Most importantly, it enables a step-change in power and thermal management capability that will be required to accommodate and fully exploit the next-generation mission systems on the F-35.
Advanced materials and components
The use of new, lighter weight and more durable materials along with advanced additive manufacturing methods allow the engine to operate beyond previous generation engine limits for more survivability. These new materials and methods also improve reliability and serviceability of the engine.
"[The military would] like more range. They'd like more thrust. And they need better thermal management, just given the sheer magnitude of the electronics on board. We know our XA100 is the only engine that can fulfill that mission. It's the only engine that's been tested. We have two of them. We've had a lot of the Air Force brass through here to see the XA100. And I think as we work through the rest of this year, we will work hard to make sure the warfighters have what they need in that moment of truth with the XA100."
– H. Lawrence Culp, Jr., GE Chairman and CEO and GE Aerospace CEO
“When it comes to the Indo-Pacific, we need to be careful to not sacrifice the immediate for the future. We must support both. Unfortunately, when it comes to air power, this year’s [FY24] budget misses a critical opportunity to field new [AETP] engine technology by 2028 that will dramatically multiply our capability in the region and improve deterrence through the F-35 program… As we develop a fully networked force with our allies and partners, the ability of the F-35 to collect and synthesize data will be an incredible force multiplier as part of Joint All Domain Command and Control, or JADC2. To harness these capabilities, our services need a much better engine. Until this year we were on the right path.”
– Deborah Lee James, 23rd Secretary of the Air Force
“As we continue to debate how to counter the technological advancements made by our adversaries, the XA100 engine belongs in the conversation. For the Pentagon the elevate one engine over another goes against the free market and I will be pressing defense officials on their rationale for this misguided decision [to not fund AETP]”
– U.S. Congressman Mike Turner, Chairman of the House Permanent Select Committee on Intelligence
“The [F-35] will be the backbone of American and Allied combat aviation for decades to come. That’s good. It is a fantastic fighting machine. It has capabilities that literally redefine combat aviation. I truly believe we now have the [engine] technology available to make a good thing even better with AETP. I trust the Congress and DoD will take advantage of those extra decades of development and keep the F-35s dominant as the global threat environment changes.”
– Gen. (Ret.) T. Michael Moseley,18th Chief of Staff of the U.S. Air Force
“At a time when the U.S. is likely to be outnumbered by its adversaries, particularly in a fight in the Indo-Pacific, it’s important that our aviators have the best fighters America can provide. Air combat is unforgiving when it comes to second best. Putting one of the AETP engines in the F-35 is clearly the best choice for U.S. national security.”
– John Venable, Senior Research Fellow, Defense Policy, Heritage Foundation
"The AETP engines, while slightly more up front, will cost considerably less over time because of their greater efficiency gains. Less fuel burn equals more range, equals a requirement for fewer tankers. Increased durability will also pay you back with fewer maintenance cycles and overhauls. And by building in lifetime margin, you eliminate the incremental upgrade approach that has built-in costs at every turn. … it only makes sense to choose the option that will work better and pay you back for the investment.”
– Jeremiah Gertler, Director, The Defense Concepts Organization
“[AETP] is a fully competitive program… it is not replicating something we are already buying; it is moving military aircraft engines to an entirely new technology, thanks to advanced materials and decades of development since the last clean-sheet fighter engine. Yes, it is about improving the F-35, but the AETP is building the foundation of the future of American combat aviation.”
– Erin Conaton, Former Under Secretary of Defense for Personnel & Readiness
The XA100 is fully tested and ready to provide revolutionary propulsion capabilities for the F-35, with two engines and having completed the Air Force testing process.Watch Video
Amy Gowder, president and CEO of GE Aerospace Defense and Systems business, discusses the history and future outlook of GE Aerospace's mission to revolutionize military flight through innovative technologies like the XA100.Watch Video
GE Aerospace has successfully concluded testing on its second XA100 adaptive cycle engine with the U.S. Air Force at the Arnold Engineering Development Complex (AEDC).Read more
GE Aerospace's David Tweedie explains why only the XA100 can deliver the revolutionary capabilities our military needs by 2028.Read more
The U.S. Air Force and GE Aerospace initiated Phase 2 testing of GE’s second XA100 adaptive cycle engine, marking the first test of an Adaptive Engine Transition Program (AETP) at the Arnold Engineering Development Complex.Read More
The XA100 Adaptive Cycle Engine is ushering in a new era of combat propulsion to deliver transformational capability to fighter aircraft and the U.S. military.Watch Video
GE Aerospace has concluded phase 1 testing on its second XA100 adaptive cycle engine as part of the U.S. Air Force’s Adaptive Engine Transition Program (AETP) at GE’s Evendale, Ohio altitude test facility.Read more
GE Aerospace initiated testing on its second XA100 adaptive cycle engine, its final planned prototype engine as part of AETP, at GE’s Evendale, Ohio altitude test facility.Read more
GE Aerospace’s first XA100 adaptive cycle engine successfully concluded testing, validating the ability of the engine to deliver transformational propulsion capability to fighter aircraft.Read more
GE Aerospace's Dave Tweedie discusses benefits of the Adaptive Engine Transition Program (AETP), allowing more power and efficiency for future combat aircraft.Watch Video
In February 2019, GE Aerospace's XA100 successfully completed the detailed design process, paving the way for fabricating and testing multiple full-sized adaptive cycle engines.Read more
The revolutionary Adaptive Cycle Engine from GE Aerospace is the latest in a proud legacy of game-changing propulsion innovations.Watch Video
The XA100 is a product of GE's Edison Works, a team dedicated to the research, development, and production of advanced military solutions.
This team has full responsibility for strategy, innovation, and execution of advanced programs.
The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement.