Air Force sees another year delay for next-gen engines – Breaking Defense
2 min read
Certainly, the U.S. Air Force has delayed its next-generation fighter engine program again. Next Generation Adaptive Propulsion (NGAP) prototypes now won’t be ready until 2031. Specifically, this is a three-year delay from original plans. GE Aerospace and Pratt & Whitney are building the competing engine designs.
However, this slow progress creates a problem for the new F-47 fighter jet. The Pentagon wants to fly the F-47 very soon. Therefore, a revolutionary new engine is unlikely to be available for its early versions. Instead, the military may use existing engine technology first.
| Aspect | GE Aerospace (XA102) | Pratt & Whitney / RTX (XA103) |
|---|---|---|
| Engine Designation | XA102 | XA103 |
| Latest Milestone | Cleared Assembly Readiness Review | Completed fully digital Assembly Readiness Review; transitioning from digital design to physical hardware |
| Prototype Completion Target | 2031 — delayed ~1 year from FY26 projections; ~3 years behind original schedule | |
| Contract Ceiling | $3.5 billion | $3.5 billion |
| FY27 / FY28 Budget Request | ~$514M (FY27) / ~$906M (FY28) — combined program funding across both vendors | |
Next-Gen Engines Delayed Further
Notably, the Air Force has again delayed its Next Generation Adaptive Propulsion (NGAP) engine program until 2031. Consequently, this timeline likely puts the advanced engine out of reach for the new F-47 fighter in the near term. Similarly, both competing companies, GE and Pratt & Whitney, report they are making progress with their prototypes. Therefore, everyone must wait for this key technology that could change military flight.
Delay Impacts F-47 Fighter Program
This indicates a three-year delay for the Air Force’s next-gen engine program. Therefore, the new 2031 timeline allows for expanded testing. Similarly, both competing companies are making progress. Moreover, the program budget shows significant increases. Consequently, the new engine likely will not be ready for the initial F-47 aircraft. Thus, advanced propulsion remains a future capability.
“The new timeline for the Next Generation Adaptive Propulsion (NGAP) program reflects expanded test and evaluation of NGAP prototypes and allows investigation of test findings.”
Ultimately, the Air Force’s next-gen fighter engine program faces another delay, pushing prototyping completion to 2031. Consequently, this revised timeline allows for expanded testing and evaluation of new designs. As a result, the total projected delay is now about three years from earlier plans. Therefore, both competing companies continue to progress with their prototype development and testing milestones.
In summary, this extended timeline affects the engine’s availability for the F-47 fighter program. Thus, a next-gen adaptive engine is likely out of reach for that platform in the near term. Accordingly, the significant budget increases show continued investment despite the schedule changes. In conclusion, the advanced adaptive technology remains a key future capability for military aviation.
