อ้างอิง ของ นอร์ทธรอปกรัมแมน บี-21 ไรเดอร์

  1. ↑ Gulick, Ed (12 July 2014). "AF moves forward with future bomber". U.S. Air Force.
  2. ↑ Petersen, Melody (7 February 2015). "New stealth bomber contract likely to be boon for Antelope Valley". Los Angeles Times.
  3. ↑ Osborn, Kris (28 March 2017). "The Northrop Grumman B-21 Stealth Bomber: Simply Unstoppable?". The National Interest.
  4. 1 2 3 John R. Hoehn & Jeremiah Gertler (22 September 2021). "Air Force B-21 Raider Long-Range Strike Bomber". Congressional Research Service. B-21s would initially replace the fleets of B-1 and B-2 bombers, and could possibly replace B-52s in the future.
  5. ↑ "New B-21 bomber named 'Raider': U.S. Air Force". Reuters. 19 September 2016. สืบค้นเมื่อ 23 April 2017. The stealth B-21, the first new U.S. bomber of the 21st century, is part of an effort to replace the Air Force's aging B-52 and B-1 bombers, though it is not slated to be ready for combat use before 2025.
  6. ↑ "US Air Force requests $156.3 billion in FY19, plans to retire B-1, B-2 fleets". Defense News. 12 February 2018. สืบค้นเมื่อ 13 February 2018.
  7. ↑ Mizokami, Kyle. "The B-21 Bomber Is the Coolest Plane We've Never Seen". Popular Mechanics. สืบค้นเมื่อ 5 February 2020.
  8. ↑ Dave Majumdar (July 10, 2014). "Air Force Releases Request for Proposal for Secretive Long Range Bomber". USNI News. United States Naval Institute.
  9. ↑ Weisgerber, Marcus (13 September 2015). "Here Are A Few Things the New Air Force Bomber Will Do Besides Drop Bombs". Defense One. สืบค้นเมื่อ 2 March 2016.
  10. ↑ Tirpak, John A. (20 May 2022). "B-21 Raider First Flight Now Postponed to 2023". Air Force Magazine. สืบค้นเมื่อ 27 May 2022.
  11. ↑ D'Urso, Stefano (17 January 2021). "Second B-21 Raider Under Construction As The First One Approaches Roll-Out In Early 2022". The Aviationist. สืบค้นเมื่อ 5 Feb 2021.

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WikiPedia: นอร์ทธรอปกรัมแมน บี-21 ไรเดอร์ http://nationalinterest.org/blog/the-buzz/the-nort... https://www.airforcemag.com/b-21-raider-first-flig... https://www.defensenews.com/smr/federal-budget/201... https://www.defenseone.com/technology/2015/09/air-... https://www.latimes.com/business/la-fi-stealth-bom... https://www.northropgrumman.com/what-we-do/air/b-2... https://www.popularmechanics.com/military/aviation... https://www.reuters.com/article/us-airforce-northr... https://theaviationist.com/2021/01/17/second-b-21-... https://crsreports.congress.gov/product/pdf/R/R444...