B-21 Final Assembly Line Breaks Ground at Palmdale
The US Air Force and Northrop Grumman have broken ground on a new final assembly line for the B-21 Raider at Air Force Plant 42 in Palmdale, California. The groundbreaking took place on September 29, 2026, and the Department of the Air Force announced it in a release on October 8.
The project adds more than one million square feet of facilities and supports a planned 25% increase in annual B-21 production capacity. The customer is the US Air Force, with the Rapid Capabilities Office running the programme, and the contractor is Northrop Grumman.
B-21 Final Assembly Line Breaks Ground at Palmdale
| Item | Detail |
|---|---|
| Customer | US Department of the Air Force (Rapid Capabilities Office) |
| Contractor | Northrop Grumman |
| Site | Air Force Plant 42, Palmdale, California |
| Scope | New final assembly line, more than one million square feet of facilities |
| Capacity goal | Planned 25% increase in annual B-21 production capacity |
| Government funding | $4.5 billion authorised and appropriated under fiscal 2025 reconciliation legislation |
| Agreement | Finalised in February 2026, per Air Force Technology |
| Groundbreaking | September 29, 2026 |
| Air Force release | October 8, 2026 |
Secretary of the Air Force Troy Meink said in a social media post after the ceremony: “It’s more than construction … we’re moving fast to build B-21s!” Gen. Dale White, who directs critical major weapon systems, said in the release that the groundbreaking “represents a sustained commitment to delivering the capability our nation needs at the speed the security environment demands.”
Col. Nicholas Jordan, the B-21 Systems program director at the Rapid Capabilities Office, said the investment in Palmdale will provide “the infrastructure, workforce and manufacturing capacity needed to deliver the Raider to the Air Force at an increased rate.” No completion date for the line appears in the coverage we read.
How the B-21 Expansion Is Funded
The Air Force is applying $4.5 billion, authorised and appropriated under fiscal 2025 reconciliation legislation, to accelerate production of the approved acquisition profile of 100 B-21 aircraft. Military Times describes that profile as a minimum of 100 aircraft.
Northrop Grumman said in a February 23, 2026 release that it has invested more than $5 billion in the programme’s digital engineering and manufacturing infrastructure. Air Data News separately reports that the company has committed $2.5 billion of its own capital to expand manufacturing capacity. We did not find that figure in the Air Force or company material we read, so treat it as a single-source number.
B-21 vs B-2 vs B-1B
The B-21 is meant to replace the B-1B Lancer and B-2 Spirit over the coming decades, according to Military Times. The table sets the three bombers side by side using public reference data.
| Bomber | First flight and service | Numbers, engines and payload |
|---|---|---|
| B-21 Raider | First flight November 10, 2023; still in flight test, with first operational aircraft planned at Ellsworth AFB in 2027 | At least 100 planned; two PW9000 turbofans; main weapons bay rated for 20,000 lb |
| B-2 Spirit | First flight July 17, 1989; initial operational capability January 1, 1997 | 21 built; four F118 turbofans; up to 40,000 lb of ordnance |
| B-1B Lancer | First production B-1B flew October 18, 1984; initial operational capability October 1, 1986 | 100 B-1Bs built; four F101-102 turbofans; up to 75,000 lb of payload |
Plant 42 and the Road to Ellsworth
Plant 42 is owned by the Air Force but hosts manufacturing run by defence contractors. Northrop Grumman already assembles the B-21 there and used the Palmdale complex to build the B-2, according to Air Data News. The same outlet says the test aircraft were built with production-representative processes and tooling.
The Department of the Air Force reaffirmed that the programme remains on schedule, with the first operational aircraft expected at Ellsworth Air Force Base, South Dakota, in 2027. Air Force Technology notes a separate $49.8 million contract to Conti Federal for 80 environmental protection shelters at Ellsworth, which it links to preparations for service entry.
Northrop Grumman Company Profile
| Item | Detail |
|---|---|
| Headquarters | West Falls Church, Virginia |
| Founded | 1994 (Northrop and Grumman merger) |
| Employees | About 95,000 (2025) |
| Revenue | About $41.9 billion (2025) |
| CEO | Kathy Warden |
| Segments | Aeronautics Systems, Defense Systems, Mission Systems, Space Systems |
| Known programmes | B-21 Raider, B-2 Spirit, Sentinel ICBM, James Webb Space Telescope, MQ-4C Triton |
What the 25 Percent Figure Leaves Out
Neither the Air Force nor Northrop Grumman has disclosed the current annual production rate, so the 25% increase cannot be turned into a number of extra bombers per year.
Building a new line while the aircraft is still in flight test suggests the programme expects production to continue past the first deliveries. That reading is analysis, not a company or Air Force claim.
B-21 Assembly Line FAQ
Where is the new B-21 assembly line?
At Air Force Plant 42 in Palmdale, California, where Northrop Grumman already assembles the B-21.
When was ground broken?
The ceremony was held on September 29, 2026. The Air Force announced it on October 8, and Air Force Technology reported it on October 12.
How large is the new facility?
More than one million square feet of facilities, according to the Air Force release.
How much will production capacity rise?
The partners plan a 25% increase in annual B-21 production capacity. The current rate has not been published.
When will the first operational B-21 arrive?
The programme remains on track for the first operational aircraft at Ellsworth Air Force Base in 2027, according to the Air Force.
- Air Force Technology – “US DAF, Northrop Grumman break ground on new B-21 assembly line” (October 12, 2026): airforce-technology.com
- Department of the Air Force – “DAF, Northrop Grumman break ground on B-21 production facility” (release, October 8, 2026), as quoted by Military Times and Defence Industry Europe
- Northrop Grumman – “Northrop Grumman Accelerating B-21 Raider Production” (February 23, 2026): news.northropgrumman.com
- Military Times – “Air Force, Northrop Grumman break ground on B-21 Raider facility” (October 8, 2026)
- Air Data News – “Northrop Grumman begins construction of new B-21 assembly line” (October 8, 2026)
- Wikipedia – Northrop Grumman B-21 Raider; Northrop Grumman B-2 Spirit; Rockwell B-1 Lancer; Northrop Grumman (aircraft and company data)
