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Northrop Grumman B-21 Raider

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"B-21" redirects here. For other uses, see B21 (disambiguation).

B-21 Raider
B-21 (AF 0001) in flight in 2024
General information
TypeStealth strategic bomber
National originUnited States
ManufacturerNorthrop Grumman
StatusLow rate initial production[1]
Primary userUnited States Air Force
Number built3[2]
History
First flight10 November 2023 (13 months ago) (10 November 2023)
Initiated2011

The Northrop Grumman B-21 Raider is an American strategic bomber in development for the United States Air Force (USAF) by Northrop Grumman. Part of the Long Range Strike Bomber (LRS-B) program, it is to be a stealth intercontinental strategic bomber that can deliver conventional and thermonuclear weapons. Named "Raider" in honor of the Doolittle Raiders of World War II, the B-21 is meant to replace the Rockwell B-1 Lancer and Northrop B-2 Spirit by 2040, and possibly the Boeing B-52 Stratofortress after that.

The Air Force began planning for the B-21 in 2011 and awarded the major development contract in 2015, aiming to have it in service "in the mid-2020s".[3] By 2021, that date had slipped to 2027.[4]

As of 2021, many aspects of the B-21 special access program were still highly classified, though some information about various other aspects of the program have been made public since 2015. The first B-21 aircraft was unveiled at a 2 December 2022 ceremony at Northrop Grumman's production facilities in Palmdale, California. The first flight of a B-21 occurred on 10 November 2023. By September 2024, three airworthy B-21s were involved in program testing.

Design and development

[edit]
Main articles: Next-Generation Bomber and Long Range Strike Bomber
The B-21 in this 2016 artist's rendering was a notably darker gray than the actual plane rolled out in 2022.

The classified Long Range Strike Bomber (LRS-B) program began in 2011,[5] to create a stealth intercontinental strategic bomber for the USAF, able to deliver conventional and thermonuclear weapons.[6] The Air Force issued a request for proposal to develop an LRS-B aircraft in July 2014.[5][7] A development contract was awarded to Northrop Grumman in October 2015.[8] Boeing and Lockheed Martin, who submitted losing bids for the project, filed bid protests;[9] in October 2016, the Government Accountability Office (GAO) rejected the challenges and sustained the USAF's decision to award the LRS-B contract to Northrop Grumman. The GAO report revealed that cost was the deciding factor in selecting Northrop Grumman over the Boeing-Lockheed Martin team.[10][11]

Management and acquisition of the B-21 program is being overseen by the Air Force Rapid Capabilities Office, rather than through the traditional military-procurement process.[12] However, the B-21 program remains subject to the Nunn–McCurdy reporting requirements to Congress.[12]

A 2015 media report said the Air Force wanted the bomber to also function as an intelligence collection platform, battle manager, and interceptor aircraft.[8] In 2016, then–Secretary of the Air Force Deborah Lee James said that the B-21 would be a "fifth-generation global precision attack platform" with networked sensor-shoot capability.[13] Northrop Grumman describes the B-21 as "the world's first sixth-generation aircraft."[14]

Richard E. Cole, left, the last living Doolittle Raider, announces the name of the B-21 with Air Force Secretary Deborah Lee James, right, during the Air Force Association conference on 19 September 2016.

At the 2016 Air Warfare Symposium, Air Force officials announced that the LRS-B would be designated "B-21" because it would be the 21st century's first bomber.[15] In September 2016, Air Force officials announced that the B-21 would be named "Raider" in honor of the Doolittle Raiders.[16] Retired Lt. Col. Richard E. Cole, then the last living member of the Doolittle Raiders, was present at the naming ceremony at the Air Force Association conference.[17]

In March 2016, the USAF announced seven tier-one suppliers for the program: Pratt & Whitney, BAE Systems, Spirit AeroSystems, Orbital ATK, Rockwell Collins, GKN Aerospace, and Janicki Industries.[18][19]

In 2016, the F-35 program manager Chris Bogdan said the B-21's engines would be similar enough to the F-35's Pratt & Whitney F135 engine to reduce its cost.[20]

The cockpit windows of the B-21 are unique to the aircraft, and designed to eliminate joints and seams to minimize its radar cross-section.

The program completed its critical design review in December 2018.[21] In January 2020, Air Force officials released new B-21 renderings, showing the distinctive flush and blended inlets and the two-wheel main landing gear design. The drawing appeared to show a smaller, lighter aircraft than the B-2.[22][23]

Production and assembly

[edit]

In February 2016, the head of the Air Force Global Strike Command said he expected the service would place an initial order for 100 B-21s and build up to a full fleet of 175 to 200.[24] In 2017, two USAF studies suggested that Air Force could increase its initial purchase from 80-to-100 to 145 aircraft.[25]

Assembly of the B-21 takes place at the United States Air Force Plant 42 near Palmdale, California, at the same facility Northrop Grumman used during the 1980s and 1990s to build B-2 bombers.[12][26]

B-21 in a hangar at Plant 42 in Palmdale, California

In January 2017, Northrop Grumman was awarded a $35.8 million contract modification for a large coatings facility at Plant 42, to be completed by the end of 2019. The contract announcement did not specifically mention B-21, but the facility was likely meant for B-21 stealth coating.[27] By the summer of 2019, it was reported that construction of the first aircraft was underway.[28] In early 2021, several media outlets reported that as completion of the first B-21 approached, construction on the second unit had begun.[29][30]

The first B-21 at Northrop's Plant 42 in Palmdale, California in November 2022

At a congressional hearing in June 2021, Darlene Costello, the acting Assistant Secretary of the Air Force Acquisition, Technology & Logistics, confirmed that the first two B-21s were under construction at Plant 42.[31][32]

By February 2022, six B-21s were under construction.[33][34] The first B-21 was moved to a calibration facility the following month.[35] About 8,000 Northrop Grumman employees had worked on the program with more than 400 suppliers from at least 40 states.[14]

Video of the B-21 Raider unveiling in Palmdale, California on 2 December 2022.

The first B-21 test aircraft was unveiled at Northrop Grumman's production facilities in Palmdale, California, on 2 December 2022.[36][37][38] At the unveiling, Northrop CEO Kathy Warden said that the B-21 is designed with modular, open systems architecture to allow easy upgrades[a] and, potentially, the ability to export components to foreign buyers.[40] Warden said that the B-21's internal operations were "extremely advanced compared to the B-2" and that the B-21 was slightly smaller than the B-2, with a longer range.[37]

The first B-21s are not prototypes but rather test aircraft that the Air Force will convert to operational configuration after the completion of tests.[36][41]

In September 2023, program officials said fueling and engine tests were proceeding ahead of the anticipated first flight by year's end.[42] The first test flight of the B-21 took place on 10 November 2023 at the Air Force's Plant 42 in Palmdale, California.[43]

On 23 January 2024, a low rate initial production (LRIP) contract was awarded.[1]

Program costs

[edit]

In July 2016, the USAF said it would not release the estimated cost of Northrop's B-21 contract, asserting that the number would reveal too much information about the classified project to potential adversaries. The Senate Armed Services Committee also voted to not publicly release the program's cost, restricting the information to congressional defense committees over the objections of a bipartisan group of legislators led by the committee's chairman, Senator John McCain.[44] McCain's proposed revisions to the National Defense Authorization Act for Fiscal Year 2017 would have reduced authorization for the B-21 program by $302 million "due to a lower than expected contract award value", while requiring "strict ...program baseline and cost control thresholds", "quarterly program performance reports", and "disclosure of the engineering and manufacturing development total contract award value".[45] The versions of the 2017 NDAA as initially passed by the House and Senate would have required public disclosure of the total cost of the B-21, but this provision was removed in the final conference report version.[12]

In December 2022, the cost of the B-21 was estimated at $700 million per aircraft.[46] At the time, Air Force officials estimated that they would spend at least $203 billion over 30 years to develop, purchase, and operate a fleet of at least 100 B-21s.[26]

Maintenance, sustainment, and operation

[edit]

Maintenance and sustainment of the B-21[a] will be coordinated by Tinker Air Force Base, Oklahoma, while Edwards Air Force Base, California, will lead testing and evaluation.[47] The B-21 is expected to operate from bases that currently host heavy bombers, such as Dyess Air Force Base, Texas; Ellsworth Air Force Base, South Dakota; and Whiteman Air Force Base, Missouri.[48] In March 2019, Ellsworth was selected as the base to host the first operational B-21 unit, as well as the first training unit.[49]

The B-21 is slated to, by 2040, replace the U.S. Air Force's 45 B-1 strategic bombers, which date from the 1980s, and 19 B-2 strategic bombers, which date from the 1990s. The B-21 may also eventually replace the B-52, which originally dates from the 1950s and is slated to remain in service for many decades.[12][50] The USAF plans to replace its bomber fleet and most of the service’s nuclear delivery weapons, including its ICBMs. The Air Force is focusing on Indo-Pacific operations around the B-21, which officials say is a crucial platform in a potential fight against China.[51]

[edit]
Front of the B-21

In March 2022, Air Force Secretary Frank Kendall III raised the possibility of a bomber drone to work with the bomber,[52][53] but the idea was later dropped because it would not save much money to produce such a large, unmanned aircraft.[54]

The USAF is also planning to acquire a new long-range fighter from its Next Generation Air Dominance program, known as the F-X or "Penetrating Counter-Air", to escort the B-21 deep into enemy territory and help it survive enemy air defenses and intercepting fighters.[55]

Possible Australian interest

[edit]

In December 2022, an Australian Strategic Policy Institute report advocated the acquisition of a number of B-21 Raiders to enable Australia to have a greater long-range strike capability.[56]

The report states that a B-21 could fly 2,500 miles (4,000 km) without refueling while carrying more munitions as compared to the maximum 930 miles (1,500 km) range of the RAAF's F-35 fighter jets, which require air-to-air refueling. A single B-21 can also deliver the same impact as several F-35As. Additionally, the B-21 can attack targets from secure air bases located in Australia's south, with greater proximity to more personnel, fuel, and munitions.[57]

During bilateral talks held in August 2022, it was reported that the US might allow Australia to procure the B-21. When asked if the US would consider allowing Australia to join in developing the B-21 bomber, Air Force Secretary Frank Kendall stated, "I don't think that there's any fundamental limitation on the areas in which we can cooperate. If Australia had a requirement for long-range strike, then we'd be willing to have a conversation with them about that."[58] However, the Defence Strategic Review released by the Australian government on 24 April 2023 stated that the B-21 was not considered a suitable option for acquisition.[59] Australia will instead invest in the upgrading of its F-35As and F/A-18Fs to the latest Block 4 and Block III configurations, respectively, to enable both aircraft to be capable of launching the AGM-158C LRASM and the Joint Strike Missile.[60]

As part of an Institute of Public Affairs paper released in August 2024, the first of six recommendations encourages the Australian Government to reconsider their position on the Raider, and stating that they should purchase it to reconcile a long-range strike gap should the AUKUS program have delays.[61] The Royal Australian Air Force has expressed interest in purchasing the B-21 under the AUKUS collaboration.[62][63]

Flight and testing

[edit]
B-21 at Edwards Air Force Base during flight testing in January 2024

The test program is managed by the Air Force Test Center and the 412th Test Wing's B-21 Combined Test Force, which includes Northrop Grumman personnel.[64][65] The first B-21 made its maiden flight on 10 November 2023.[66] On 17 January 2024, the B-21 flew its second publicly acknowledged test flight from Edwards AFB.[51] By September 2024, three test aircraft were in service: one performing one or two flight tests per week, and the others involved in ground tests.[67]

Operators

[edit]
 United States (100 planned)[68]

Specifications (estimates)

[edit]

Data from Aviation Week & Space Technology[69]

General characteristics

  • Capacity: 20,000 lb (9,100 kg) weapon load
  • Length: 54 ft (16 m)
  • Wingspan: 132 ft (40 m)
  • Empty weight: 70,000 lb (31,751 kg)
  • Max takeoff weight: 180,000 lb (81,647 kg)

Performance

  • Maximum speed: Mach 0.8+

See also

[edit]

Related development

Aircraft of comparable role, configuration, and era

Related lists

Notes

[edit]
  1. ^ a b On 29 November 2022, Northrop Grumman announced that it would use a cloud-based digital twin to support B-21 operations and sustainment.[39]

References

[edit]
  1. ^ a b "B-21 Raider Now In Production Just Two Months After First Flight". twz.com. 23 January 2024. Archived from the original on 26 January 2024. Retrieved 28 January 2024.
  2. ^ "Three B-21s Participating In Test Program, Northrop Says". Aviation Week. Retrieved 19 September 2024.
  3. ^ Tirpak, John A. (20 May 2022). "B-21 Raider First Flight Now Postponed to 2023". Air & Space Forces. Archived from the original on 11 November 2023. Retrieved 27 May 2022.
  4. ^ D'Urso, Stefano (17 January 2021). "Second B-21 Raider Under Construction As The First One Approaches Roll-Out In Early 2022". theaviationist.com. Archived from the original on 26 September 2023. Retrieved 5 February 2021. The new bomber will be ready for service around 2026 or 2027, according to Lt. Gen. James C. Dawkins, Jr., Deputy Chief of Staff for Strategic Deterrence and Nuclear Integration.
  5. ^ a b Majumdar, Dave (10 July 2014). "Air Force Releases Request for Proposal for Secretive Long Range Bomber". USNI News. Archived from the original on 31 May 2023.
  6. ^
  7. ^ Drew, James (26 February 2016). "USAF Global Strike chief seeks beefed-up bomber force". FlightGlobal. Archived from the original on 23 January 2024.
  8. ^ a b Weisgerber, Marcus (13 September 2015). "Here Are A Few Things the New Air Force Bomber Will Do Besides Drop Bombs". Defense One. Archived from the original on 20 March 2023. Retrieved 2 March 2016.
  9. ^ Hillis, Amy (6 November 2015). "LRSB: (Yet Another) Tale of Two Protests". Aviation Week & Space Technology. Archived from the original on 5 March 2016. Retrieved 27 February 2016.
  10. ^ Insinna, Valerie (25 October 2016). "Game Over: GAO Protest Reveals Cost Was Deciding Factor in B-21 Contest". Defense News. Archived from the original on 23 January 2024. Retrieved 26 October 2016.
  11. ^ "The Boeing Company | U.S. GAO". US Government Accountability Office. Retrieved 8 December 2024.
  12. ^ a b c d e Hoehn, John R.; Gertler, Jeremiah (22 September 2021). Air Force B-21 Raider Long-Range Strike Bomber (Report). Congressional Research Service. Archived from the original on 8 December 2023. B-21s would initially replace the fleets of B-1 and B-2 bombers, and could possibly replace B-52s in the future.
  13. ^ Drew, James (26 February 2016). "USAF reveals Northrop's B-21 long-range strike bomber". FlightGlobal. Archived from the original on 16 July 2023.
  14. ^ a b "10 Facts About Northrop Grumman's B-21 Raider". Northrop Grumman Newsroom (Press release). 29 November 2022. Archived from the original on 15 December 2023. Retrieved 5 December 2022.
  15. ^ Martin, Mike (26 February 2016). "Air Force reveals B-21 Long Range Strike Bomber" (Press release). AFNS. Archived from the original on 15 November 2023. Retrieved 2 March 2016.
  16. ^ Martin, Mike (19 September 2016). "The B-21 has a name: Raider" (Press release). AFNS. Archived from the original on 8 June 2023. Retrieved 21 September 2016.
  17. ^ Giangreco, Leigh (19 September 2016). "Last surviving Doolittle Raider rises to name Northrop B-21". FlightGlobal. Archived from the original on 22 November 2023. Retrieved 3 December 2022.
  18. ^ Drew, James (8 March 2016). "USAF names seven top-tier Northrop B-21 suppliers". FlightGlobal. Archived from the original on 10 October 2023. Retrieved 9 March 2016.
  19. ^ Siebenmark, Jerry (2 June 2017). "Spirit's work on new B-21 Bomber will require new jobs". The Wichita Eagle. Archived from the original on 3 June 2017. Retrieved 3 June 2017.
  20. ^ Shalal, Andrea (10 March 2016). "U.S. F-35 chief expects savings after Pratt's B-21 bomber win". Reuters. Archived from the original on 5 December 2022. Retrieved 10 March 2016.
  21. ^ Pappalardo, Joe (6 December 2018). "New B-21 Secret Bomber Passes Crucial Milestone". Popular Mechanics. Archived from the original on 13 December 2023. Retrieved 12 April 2019.
  22. ^ Rogoway, Tyler (31 January 2020). "Here's Our Analysis of the Air Force's New B-21 Stealth Bomber Renderings". twz.com. Archived from the original on 28 July 2023.
  23. ^ Tirpak, John (31 January 2020). "B-21 Images Show New Details of Secret Bomber". Air & Space Forces. Archived from the original on 6 February 2023.
  24. ^
  25. ^ Host, Pat (26 May 2017). "US Air Force could substantially increase B-21 buy". Jane's Defence Weekly. Archived from the original on 26 May 2017.
  26. ^ a b Hennigan, W. J. (3 December 2022). "The Making of the U.S. Military's New Stealth Bomber". Time. Archived from the original on 14 November 2023.
  27. ^ Mehta, Aaron (1 February 2017). "New Northrop facility deal likely meant for B-21 stealth coating". Defense News. Archived from the original on 4 January 2024.
  28. ^ Gady, Franz-Stefan (17 July 2019). "US Air Force Is Building First B-21 Stealth Bomber". The Diplomat. Archived from the original on 29 May 2023. Retrieved 3 December 2022.
  29. ^ D'Urso, Stefano (19 January 2021). "The Air Force's 2nd B-21 bomber is under construction as the first one starts 'to look like a bomber'". Business Insider. Archived from the original on 20 November 2023.
  30. ^ Tirpak, John A. (15 January 2021). "Second B-21 Under Construction as Bomber Moves Toward First Flight". Air & Space Forces. Archived from the original on 4 February 2023. Retrieved 28 September 2022.
  31. ^ "Subcommittee on Seapower and Projection Forces Hearing: 'Air Force Projection Forces Aviation Programs and Capabilities Related to the 2022 President's Budget Request'". House Armed Services Committee. 8 June 2021. Archived from the original on 10 June 2021. Retrieved 10 June 2021.
  32. ^ Costello, Darlene; Nahom, David S.; Hinote, S. Clinton. "Hearing date/time: June 8 2021, 1100 Presentation to The House Armed Services Committee Subcommittee on Seapower and Projection Forces" (PDF). House Armed Services Committee. Archived (PDF) from the original on 17 December 2023. Retrieved 6 March 2022.
  33. ^ Newdick, Thomas (3 March 2022). "First B-21 Raider Is Now Undergoing Calibration Tests As Official Rollout Approaches". twz.com. Archived from the original on 4 June 2023. Retrieved 6 March 2022.
  34. ^ Hadley, Greg (9 February 2022). "Six B-21s in Production, Fuel Control Software Already Tested". Air & Space Forces. Archived from the original on 16 May 2023. Retrieved 10 February 2022.
  35. ^ Tirpak, John A. (3 March 2022). "First B-21 Moves to New Hangar for Loads Calibration". Air & Space Forces. Archived from the original on 28 July 2023. Retrieved 6 March 2022.
  36. ^ a b Gordon, Chris (10 November 2023). "New B-21 Bomber Takes First Flight". Air & Space Forces. Archived from the original on 11 November 2023. Retrieved 2 May 2024.
  37. ^ a b Copp, Tara (2 December 2022). "Pentagon debuts its new stealth bomber, the B-21 Raider". Associated Press News. Archived from the original on 17 November 2023. Retrieved 2 December 2022.
  38. ^ Tirpak, John (20 October 2022). "First B-21 Bomber to Roll Out of Northrop Grumman's Palmdale, Calif., Plant on Dec. 2". Air & Space Forces. Archived from the original on 7 December 2022. Retrieved 7 December 2022.
  39. ^ John A. Tirpak (29 Nov 2022) Northrop Grumman Offers New B-21 Raider Details Ahead of Rollout Archived 10 January 2023 at the Wayback Machine digital twin
  40. ^ Weisgerber, Marcus (2 December 2022). "Air Force Unveils New B-21 Stealth Bomber After Seven Years in the Making". Defense One. Archived from the original on 21 November 2023. Retrieved 3 December 2022.
  41. ^ "What You Need to Know About Northrop Grumman's B-21 Raider". Northrop Grumman Newsroom. Archived from the original on 22 May 2024. Retrieved 2 May 2024.
  42. ^ Decker, Audrey (13 September 2023). "B-21 starts engine tests as bomber preps for first flight". Defense One. Archived from the original on 26 October 2023. Retrieved 14 September 2023.
  43. ^ Stone, Mike; Swanson, David (10 November 2023). "US Air Force's new B-21 Raider "flying wing" bomber takes first flight". Reuters. Archived from the original on 13 December 2023. Retrieved 10 November 2023.
  44. ^ Cohen, Zachary (5 July 2016). "New stealth bomber's cost is under the radar". CNN. Archived from the original on 6 October 2022. Retrieved 5 July 2016.
  45. ^ "Proposed National Defense Authorization Act For Fiscal Year 2017" (PDF). Senate Armed Services Committee. Archived (PDF) from the original on 1 October 2023. Retrieved 6 August 2016.
  46. ^ Helmore, Edward (3 December 2022). "Pentagon unveils first strategic bomber in over 30 years to counter China". The Guardian. Archived from the original on 11 November 2023.
  47. ^ "Air Force announces bases to support B-21 Raider mission" (Press release). AFNS. 16 November 2018. Archived from the original on 2 December 2022. Retrieved 11 February 2019. The Air Force has selected Tinker Air Force Base, Oklahoma, to coordinate maintenance and sustainment of the B-21 Raider and Edwards AFB, California, to lead testing and evaluation of the next generation long-range strike bomber.
  48. ^ "Air Force selects locations for B-21 aircraft" (Press release). AFNS. 2 May 2018. Archived from the original on 10 November 2023. Retrieved 8 January 2019.
  49. ^ "Air Force announces Ellsworth AFB as first B-21 base" (Press release). AFNS. 27 March 2019. Archived from the original on 10 November 2023. Retrieved 27 March 2019.
  50. ^ Lamothe, Dan (2 December 2022). "Pentagon reveals secretive B-21 bomber in California". The Washington Post. Archived from the original on 22 June 2023.
  51. ^ a b Decker, Audrey (18 January 2024). "Air Force confirms B-21 flight testing underway at Edwards AFB". Defense One. Archived from the original on 19 January 2024. Retrieved 18 January 2024.
  52. ^ Trevithick, Joseph (8 March 2022). "Stealth Bomber Drone To Complement The B-21 Raider Could Be Pushed Into Development Soon". twz.com. Archived from the original on 20 September 2023. Retrieved 10 March 2022.
  53. ^ Reim, Garrett (10 December 2021). "US Air Force 'commits' to fielding loyal wingman UAVs". FlightGlobal. Archived from the original on 22 September 2023. Retrieved 10 March 2022.
  54. ^ Suciu, Peter (18 July 2022). "B-21 Raider Stealth Bomber: Built To Strike "Anywhere In The World"". 19FortyFive. Archived from the original on 30 September 2023. Retrieved 17 September 2022.
  55. ^
  56. ^ Marcus, Hellyer; Nicholls, Andrew (12 December 2022). "Australia should examine Plan B-21 as it weighs up long-range strike options". Australian Strategic Policy Institute. Archived from the original on 16 November 2023. Retrieved 25 January 2023.
  57. ^ Tillett, Andrew (12 December 2022). "Buy 12 stealth bombers at $28b to counter China: ASPI". Financial Review. Archived from the original on 2 June 2023. Retrieved 25 January 2023.
  58. ^ Saballa, Joe (25 August 2022). "US Considering Supply of B-21 Bombers to Australia". The Defense Post. Archived from the original on 26 June 2023. Retrieved 25 January 2023.
  59. ^ "Australian Defence Strategic Review". Australian government. 24 April 2023.
  60. ^ Salerno-Garthwaite, Andrew (24 April 2023). "Australia's Defence Strategic Review rejects B-21 Raider". Airforce Technology. Archived from the original on 11 June 2023. Retrieved 5 May 2023.
  61. ^ Jennings, Peter; Shoebridge, Michael; Hellyer, Marcus (7 August 2024). "The Defence Of Australia: A Blueprint For The Next Government – Paper 1: National Security And Australia's Northern Defence" (PDF). Institute of Public Affairs. Melbourne. Archived (PDF) from the original on 19 August 2024. Retrieved 16 August 2024.
  62. ^ Nicholls, Marcus Hellyer, Andrew. "'Impactful projection': long-range strike options for Australia". aspi.org.au. Retrieved 6 December 2024.{{cite web}}: CS1 maint: multiple names: authors list (link)
  63. ^ Shoebridge, Michael (15 November 2023). "An AUKUS remix delivering greater military power faster: the B-21 Raider". defenceconnect.com.au. Retrieved 6 December 2024.
  64. ^ Decker, Audrey (10 November 2023). "B-21 takes flight, heads to Edwards AFB for more tests". Defense One. Archived from the original on 16 November 2023. Retrieved 10 November 2023.
  65. ^ Ortiz, Miguel (12 November 2023). "WATCH: B-21 Raider stealth bomber flies for first time". We Are The Mighty. Archived from the original on 23 December 2023. Retrieved 13 November 2023.
  66. ^ Copp, Tara (10 November 2023). "Nuclear stealth bomber, the B-21 Raider, takes first test flight". Defense News. Retrieved 2 May 2024.
  67. ^ Decker, Audrey (18 September 2024). "Test B-21 flying up to twice a week, Northrop reports". Defense One. Archived from the original on 18 September 2024. Retrieved 19 September 2024.
  68. ^ Hadley, Greg (25 October 2024). "Northrop: Air Force Weighs More B-21s in Force Structure Study". Air & Space Forces Magazine. Retrieved 6 December 2024.
  69. ^ Sweetman, Bill (11 October 2023). "The B-21 Raider: Designed For Low Risk". Aviation Week & Space Technology. pp. 14–16. Archived from the original on 10 December 2023.
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