What the FY2027 request buys
Verbatim from the R-2A exhibit for project 640864 of PE 0604010F. This is the budget justification's own description of work that has not happened yet — the one thing no other level of the budget carries.
- Complete purchasing materials and component rig testing. - Continue fabricating components and finalize assembly planning. - Initiate prototype engine assembly and instrumentation.
Funding increased by $187.671 million to maintain competitive prototyping.
FY2026: the year under way
Prior-year accomplishments and current-year plans from the same exhibit. Context for the FY2027 plan, not a series — an activity partitions its project exactly in the request year, but can under-cover it in earlier years.
- Continue purchasing materials, fabricating components, performing component rig testing, and planning assembly of prototypes to include integration of instrumentation for prototype testing - Conduct Assembly Readiness Reviews assessing each contractor's preparedness to proceed with build and assess test risk of their prototype engine.
Three years, and no five-year plan
An R-2A activity publishes the prior year, the current year and the budget year. The FYDP outyears exist at project and program-element level and are deliberately absent here rather than inferred. Estimate types are colored and never summed into one figure.
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 489.7 |
| FY2026 | Enacted | 326.0 |
| FY2027 | Request | 513.7 |
This activity is 100% of project 640864's FY2027 request and 100% of PE 0604010F's. In the request year the activities under a project sum to it exactly; in the current year they under-cover it in about 9% of cases, so an activity's delta can legitimately exceed its parent's and the two must not be compared row to row.
1 activity in project 640864
Every R-2A line of this project, largest FY2027 request first. Linked where the activity has enough of its own narrative to carry a page; the rest are shown in full on the program-element page.