RDT&E Program Element · President's Budget PB2027

Next Generation Adaptive Propulsion (NGAP)

PE 0604010F·U.S. Air Force·Approp. 3600 — RDT&E·BA4 — Advanced Component Development & Prototypes
FY2027 Request
$513.7M
⚑ Contested — House cuts 10.0%
HitchAI read

U.S. Air Force funding ramps 58% to a $513.7M request in FY2027, before stepping down 41% across the five-year plan. In the FY2027 defense authorization, the House cut 10.0% (to $462.3M); the Senate funded it in full; House appropriators funded it in full. GE leads the industry work.

FY2027 Request
$513.7M
▲ 58% vs FY2026
House mark
$462.3M
▼ $51.4M vs request
FY2026 Enacted
$326.0M
In law

For fiscal year 2027, the U.S. Air Force is requesting $513.7M for Next Generation Adaptive Propulsion (NGAP) under RDT&E program element 0604010F, up 58% over FY2026. In the FY2027 defense authorization, House moved to cut it to $462.3M.

Funding trajectory

Funding profile, FY2025–FY2031

Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure.

2505007500489.7FY25ACTUAL326.0FY26ENACTED513.7FY27REQUEST905.7FY28865.0FY29303.3FY30304.9FY31HOUSE
Actual Enacted Request Outyear (FYDP) House mark
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual489.7
FY2026Enacted326.0
FY2027Request513.7
FY2028Outyear905.7
FY2029Outyear865.0
FY2030Outyear303.3
FY2031Outyear304.9
Where it sits

Acquisition lifecycle

This program is funded in RDT&E Budget Activity 4 — Advanced Component Development & Prototypes.

Complete
Research
BA 1–2
Complete
Advanced Technology
BA 3
Current
Prototyping
BA 4
Later
Development & Fielding
BA 5–7
Inside the program element

1 project rolls up into PE 0604010F

Projects are the summable leaves — the PE total is their sum, never added to it. Program elements and projects carry the full five-year plan; activities stop at the budget year. This PE moves 58% overall, which can hide much larger swings below.

Project 640864

Next Generation Adaptive Propulsion (NGAP)

$513.7MFY2027 request ▲ 58%
FY2025 actual$489.7M
FY2026 enacted$326.0M
FY2027 request$513.7M
Product DevelopmentManagement Services

The Next Generation Adaptive Propulsion (NGAP) program builds upon advanced materials, technologies and manufacturing processes matured under the Adaptive Engine Transition Program (which ended in FY2024) to enhance adaptive propulsion system performance and size scalability key to enabling future aircraft capabilities. Embedded adaptive propulsion systems combine the fuel efficiency of high-bypass turbofan engines used by commercial airlines with the performance demanded of military fighter engines with augmenters. Increased fuel efficiency reduces energy demand and aerial tanker dependency while increasing platform range and or time on station. During peacetime, these benefits translate to reduced aerial tanker dependency during exercises and a choice between increased aircrew readiness or cost savings due to the less fuel needed. NGAP prototyping will validate the performance and maturity of its enabling advanced technologies, platform agnostic engine architectures and designs, and manufacturing processes through prototype testing. NGAP also drives digital transformation of the propulsion industrial base to reduce future integration risks while shortening development timelines. Program RDT&E funding may be utilized to implement innovation insertion, capability insertion, software increments, spiral upgrades, modular component swaps, and other insertions consistent with Modular Open System Architecture. Program RDT&E funding may be utilized to design, develop, integrate, and test weapon system and/or component level open architectures. Program RDT&E funding may be utilized to fund the concept refinement, design, development, integration, and testing of interdependent technologies and common architectures that underpin weapon system and portfolio-wide mission outcomes. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F This effort is in Budget Activity 4, Advanced Component Development and Prototypes (ACD&P), because efforts are necessary to evaluate integrated technologies, representative modes or prototype systems in a high fidelity and realistic operating environment.

Accomplishments / planned programs (R-2A) — prior, current and budget year only
FY2025 actual$489.7M
FY2026 enacted$326.0M
FY2027 request$513.7M

- Complete purchasing materials and component rig testing. - Continue fabricating components and finalize assembly planning. - Initiate prototype engine assembly and instrumentation.

Read the FY2027 plan →
Congressional action

The request is contested

Committee marks on the FY2027 request. Adds and cuts are reconciled in conference before they become law.

RequestPresident's Budget
$513.7M
House NDAA (HASC)HASC
$462.3M −$51.4M · −10.0%
Senate NDAA (SASC)SASC
$513.7M full · +$0
House Approps (HAC-D)HAC_D
$513.7M full · +$0
▲ $51.4M chamber gap — unresolved as of 2026-07-27. These are FY2027 authorization marks (NDAA); appropriations and the conference agreement may differ.
Who's building it

Where the FY2027 request goes

Performers named in the R-3 exhibit, resolved into industry, government-lab, and unspecified shares. Budget-justification contract funding, not obligations.

GE
$246.1M · 48%
Next Generation Adaptive Propulsion (Prototype Build and Test) - Engine OEM 1 · Various
PW
$246.1M · 48%
Next Generation Adaptive Propulsion (Prototype Build and Test) - Engine OEM 2 · Various
Where FY2027 funding flowsShare$M
Industry primes96%492.2
Other / unspecified4.2%21.5
FY2027 request100%513.7
See GE's full federal contract ledger members
Program detail

Mission & acquisition strategy

The Next Generation Adaptive Propulsion (NGAP) program builds upon advanced materials, technologies and manufacturing processes matured under the Adaptive Engine Transition Program (which ended in FY2024) to enhance adaptive propulsion system performance and size scalability key to enabling future aircraft capabilities. Embedded adaptive propulsion systems combine the fuel efficiency of high-bypass turbofan engines used by commercial airlines with the performance demanded of military fighter engines with augmenters. Increased fuel efficiency reduces energy demand and aerial tanker dependency while increasing platform range and or time on station.

In fourth quarter FY 2022 new indefinite delivery, indefinite quantity (IDIQ) contracts to complete prototype detailed design and prototyping were awarded to General Electric (GE), Pratt & Whitney (PW), Boeing, Lockheed Martin (LM), and Northrop Grumman (NG). The IDIQ contracts include digital transformation requirements, scope to complete prototype detailed design, prototype fabrication, prototype assembly, and execute prototype engine testing, digital Weapon System integration activity to reduce technology transition risk, and a contracting approach that enhances the program's acquisition agility. Competitive delivery orders for each phase; performance in current phase determines progression to next phase.

Project 640864 — Next Generation Adaptive Propulsion (NGAP)
  • Product Development
  • Management Services
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Answers are generated from the figures on this page — the FY2027 justification exhibits and the marks tracked above — and nothing else is consulted. Confirm any figure against the cited exhibit before you use it externally.

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Questions this page can answer
How does the FY2027 request compare with FY2026, and what does the five-year plan show?What did House do to this request, and what is still unresolved?How is the FY2027 request split between industry and government performers?In plain terms, what is this program element for and how is it being acquired?

This page carries the budget justification and the NDAA marks — nothing else. For what GE has actually been obligated, the ledger is at hitchintel.com/vendors; for live solicitations, hitchintel.com/opportunities. Both are member surfaces.

Provenance

Cite this page

Sources
FY2027 Department of the Air Force RDT&E Budget Justification · Exhibits R-2 / R-3 · PE 0604010F (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Next Generation Adaptive Propulsion (NGAP) (PE 0604010F)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/0604010F
Machine access
Markdown twin /programs/0604010F.md · MCP mcp.hitchintel.combudget_get_program_element, budget_get_cong_marks