KC-X explained
KC-X was the United States Air Force (USAF) program to procure its next-generation aerial refueling tanker aircraft to replace some of their older Boeing KC-135 Stratotankers. The contest was for a production contract for 179 new tankers with estimated value of US$35 billion. The two contenders to replace the KC-135 aircraft were Boeing and EADS, following the elimination of US Aerospace, Inc. from the bidding process.[1]
The KC-X program followed earlier attempts by the USAF to procure a new tanker. A 2002 plan had the USAF leasing Boeing KC-767 tankers, followed by a 2003 modification where the USAF would buy most of the KC-767 aircraft and lease several more of them. Corruption investigations revealed wrongdoing in the award of the contract and the contract was canceled in 2005, setting the stage for the KC-X program.
The USAF issued the KC-X request for proposal in January 2007, then selected the Northrop Grumman/EADS team and their Airbus A330 MRTT-based tankers in February 2008.[2] In June 2008, the U.S. Government Accountability Office sustained a protest by Boeing on the award of the contract.[3] In July 2008, the U.S. Defense Department reopened the bidding process, but canceled the KC-X solicitation in September 2008.[4] In September 2009, the USAF began the first steps toward accepting new bids.[5] In March 2010, Northrop Grumman announced that it would pull out of the bidding process. Despite Northrop Grumman's withdrawal, EADS decided to remain in the ongoing competition alone.[6] The Air Force selected Boeing's KC-46 bid on 24 February 2011.[7]
Background
The initial plan was to lease Boeing KC-767 tankers on a sole-source basis; Boeing is the only American company with the requisite industrial capability to manufacture large-body aircraft. As such, the KC-767 was selected in 2002[8] in 2003 Boeing was awarded a US$20 billion contract to lease KC-767 tankers to replace the KC-135.
Led by Senator John McCain, several US government leaders protested the lease contract as wasteful and problematic. In response to the protests, the Air Force struck a compromise in November 2003, whereby it would purchase 80 KC-767 aircraft and lease 20 more.[9]
However, in December 2003, the Pentagon announced the project was to be frozen while an investigation of allegations of corruption by one of its former procurement staffers, Darleen Druyun (who had moved to Boeing in January 2003) was begun. Druyun pleaded guilty of criminal wrongdoing and was sentenced to nine months in prison for "negotiating a job with Boeing at the same time she was involved in contracts with the company".[10] Additional fallout included the termination of CFO Michael M. Sears, who received a four-month prison sentence,[11] the resignation of Boeing CEO Philip M. Condit,[12] [13] and Boeing paying $615 million in fines.[14] In January 2006, the lease contract was formally canceled.[15]
Proposals
Initial competition
The USAF then began the KC-X tanker replacement program. The DoD posted a request for proposal on 30 January 2007.[16] The U.S. Air Force's main requirements are "fuel offload and range at least as great as the KC-135", airlift capability, ability to take on fuel in flight, and multi-point refueling capability.[16]
Two manufacturers expressed interest in producing this aircraft. The team of Northrop Grumman and EADS/Airbus proposed a version of the Airbus A330 Multi Role Tanker Transport (MRTT), based on the Airbus A330-200.[17] Boeing proposed a version of the KC-767, based on the Boeing 767.[18] The Seattle Times commented on the pre-final designs in February 2007: "Northrop has been viewed as the underdog, with a heavier, less fuel efficient aircraft. The Airbus tanker would have a maximum fuel capacity of 200,000 pounds. Northrop spokesman Randy Belote said Northrop's K-30 would tack on roughly 20 percent in fuel capacity."[19]
Both competitors submitted their tanker proposals before 12 April 2007 deadline.[20] [21] In September 2007, the USAF dismissed having a mixed fleet of new tankers from both Boeing and Northrop Grumman as being unfeasible because of increased costs from buying limited numbers of two types annually.[22] In December 2007, it was announced that the KC-X tanker would be designated KC-45A regardless of which design wins the competition.[23] The DoD anticipated that the KC-45A would start to enter service in 2013.[24]
On 3 January 2008, the competitors submitted final revisions of their proposals to the U.S. Air Force.[25] On 29 February 2008, the DoD announced the selection of the Northrop Grumman/EADS's KC-30.[26]
On 11 March 2008, Boeing filed a protest with the Government Accountability Office (GAO) of the award of the contract to the Northrop Grumman/EADS team. Boeing stated that there are certain aspects of the USAF evaluation process that have given it grounds to appeal.[27] [28] The protest was upheld by the GAO on 18 June 2008, which recommended that the Air Force rebid the contract.[29] [3]
Expedited recompetition
On 9 July 2008, the Defense Secretary Robert Gates put the tanker contract in an "expedited recompetition" with Defense Undersecretary John Young in charge of the selection process instead of the Air Force.[30] A draft of the revised RFP was provided to the contractors on 6 August 2008 for comments with the revised RFP to be finalized by mid-August. Proposals would be due in October 2008 and selection was to be done by the end of 2008.[31] [32] [33] In mid-August, there was speculation that Boeing was considering a "no bid" position.[34] On 21 August 2008 Boeing asked the DoD for an additional four months to submit a proposal centered on a larger aircraft,[35] but they opposed further delay.[36] Then on 10 September 2008, Defense Secretary Robert Gates decided that the new competition could not be fairly completed before the end of 2008. The DoD canceled the request for proposals and delayed the decision on when to issue another request until the new presidential administration was in office.[4] [37] [38] [39]
Restarted competition
On 16 September 2009, Secretary Gates announced a renewed effort for the KC-X program. The selection process will be under the Air Force with a "robust oversight role" by the Office of the Secretary of Defense (OSD) to prevent a repeated failure.[40] [41] On 25 September 2009 the USAF issued a draft request for proposals (RFP) seeking comments for the official tanker replacement RFP.[42] The RFP for a fixed-price contract specified 373 requirements for the new plane, and stated that the price of each tanker would be adjusted to reflect how much it would cost to operate over 40 years and how well it would meet various war-fighting needs. The initial contract would be for 179 aircraft for $35 billion.[43] [44] [45] Northrop Grumman/EADS team claimed the requirement was advantaging Boeing and threatened to withdraw from the competition on 1 December 2009.[46] [47] [48]
The fiscal 2011 Defense Department budget relegated $864 million in research and development money. A contract award was expected in summer 2010.[49] On 24 February 2010, the US Air Force released the revised request for proposal (RFP) for KC-X. The RFP called for the KC-X tanker to first fly in 2012 and aircraft deliveries to begin in 2013.[50]
On 8 March 2010, Northrop Grumman followed through with their earlier threat and decided to not submit a bid for the KC-X tanker stating that they believed the new evaluation methodology favored Boeing's smaller tanker.[51] [52] EADS, however announced on 20 April 2010, that it was re-entering the competition on a stand-alone basis and intended to bid the KC-30 with final assembly to take place in Mobile, Alabama as planned under its prior teaming arrangement with Northrop Grumman.[53] On 18 June 2010, the USAF announced that the decision would be delayed until November 2010.[54]
On 1 July 2010, a surprise third bidder, consisting of the team of US Aerospace and the Ukrainian manufacturer Antonov announced its intention to bid in the competition. The two firms announced that they would be interested in supplying up to three types of aircraft to the United States Air Force. The types reportedly being offered were the four-engined An-124 and a twin-engined variant of the aircraft, the An-122. The third aircraft to be offered was known as the An-112.[55] [56] The An-112 tanker is a version of the Antonov An-70, except with two jet engines. This tanker was proposed in the team's bid.[57]
By 9 July 2010 bids from Boeing, EADS and US Aerospace/Antonov were submitted to the Air Force.[58] However, the Air Force rejected the US Aerospace bid for allegedly arriving five minutes after the deadline, which US Aerospace disputed. US Aerospace filed separate protests with the U.S. Government Accountability Office (GAO) on 2 August and 1 September.[59] The U.S. Air Force proceeded with source selection while GAO investigated.[60] The GAO dismissed U.S. Aerospace's protest on 6 October.[61]
In November 2010, the USAF mistakenly sent technical reviews of the other side's bids to each of the two remaining teams.[62] At this time contract selection was postponed from late December 2010 until early 2011.[63]
Boeing and EADS submitted their final bids on 10 February 2011.[64] On 24 February 2011, Boeing's KC-767 proposal was selected as the winning offer. The tanker will be designated the KC-46A.[65] EADS North America chairman Ralph Crosby declined to protest the award saying that Boeing's bid was "very, very, very aggressive" and carried a high risk of losing money for the company.[66] Loren B. Thompson of the Lexington Institute agreed that Boeing's bid was very aggressive due to the Air Force's fixed-price contract strategy.[67]
Projected follow-on programs
- KC-Y Bridge Tanker Competition to replace KC-10.[68] Contenders: KC-46 and Lockheed Martin LMXT.
- KC-Z (Next Generation Air-Refueling System (NGAS)) to replace KC-135Rs[69] with possible stealth characteristics[70] [71] [72]
Specifications
There were three different bids proposed in July 2010. EADS proposed the Airbus A330 MRTT/KC-30, Boeing proposed the KC-767, while the Antonov/US Aerospace team's bid was the An-112KC.
+Specifications of KC-135 and tendered replacements[73] [74] [75] [76] [77] [78] [79] |
| KC-135R | A330 MRTT / KC-30 | KC-767 Advanced Tanker (based on 767-200LRF) | An-112KC |
---|
Length | 136feet | 192feet | 159feet | 131feet |
Height | 41feet | 57feet | 52abbr=onNaNabbr=on | 53feet |
Wingspan | 130feet | 197feet | 156feet | 166feet |
Fuselage width | 12abbr=onNaNabbr=on | 18feet | 16feet | 17feet |
Fuselage height | 14abbr=onNaNabbr=on | 18feet | 17feet | – |
Engines | 4 x CFM International CFM56 | 2 x Pratt & Whitney PW4170, RR Trent 700 or GE CF6-80 turbofans | 2 x Pratt & Whitney PW4062 | 2 x Engine Alliance GP7277 or Rolls-Royce Trent 972B- 84 |
Thrust | 4 x 21634abbr=onNaNabbr=on | 2 x 72000abbr=onNaNabbr=on | 2 x 63500abbr=onNaNabbr=on | – |
Passengers | 80[80] | 226–280[81] | 190 | 300 |
Cargo | 6 x 463L pallets | 32 x 463L pallets | 19 x 463L pallets | 8 pallets |
Maximum fuel capability | 200000abbr=onNaNabbr=on | 250000abbr=onNaNabbr=on | greater than 202000abbr=onNaNabbr=on | 139000abbr=onNaNabbr=on |
Max. takeoff fuel load | Approximately 200000abbr=onNaNabbr=on | 245000abbr=onNaNabbr=on | greater than 202000abbr=onNaNabbr=on | 139000abbr=onNaNabbr=on |
Range | 11015abbr=onNaNabbr=on[82] | 6750abbr=onNaNabbr=on | 6590abbr=onNaNabbr=on | 6800abbr=onNaNabbr=on |
Cruise speed | Mach 0.79 (530mph) | Mach 0.82 (534mph) | Mach 0.80 (530mph) | – |
Maximum speed | Mach 0.90 (600mph) | Mach 0.86 (570mph) | Mach 0.86 (570mph) | – |
Max. takeoff weight | 322500lb | 507000lb | greater than 400000lb | 364000lb |
Max. landing weight | 322500lb, normally 200000lb | 396800lb | 300000lb | – |
Empty weight | approx. 122000lb | 263700lb | 181600lb | 164000lb | |
See also
External links
Notes and References
- News: Censer . Marjorie . 7 October 2010 . GAO clears Air Force in tanker case . live . https://web.archive.org/web/20121111130845/http://www.washingtonpost.com/wp-dyn/content/article/2010/10/06/AR2010100606610.html . 11 November 2012 . 12 October 2010 . The Washington Post.
- News: Gates . Dominic . 29 February 2008 . EADS/Northrop trumps Boeing in Air Force tanker competition . live . https://web.archive.org/web/20210307111952/https://www.seattletimes.com/business/eads-northrop-trumps-boeing-in-air-force-tanker-competition/ . 7 March 2021 . 29 February 2008 . Seattle Times.
- Web site: B-311344; B-311344.3; B-311344.4; B-311344.6; B-311344.7; B-311344.8; B-311344.10; B-311344.11, The Boeing Company, June 18, 2008 . 18 June 2008 . Gary L. Kepplinger, General Counsel.
- Web site: DoD Announces Termination of KC-X Tanker Solicitation . 916th Air Refueling Wing . https://web.archive.org/web/20240111021916/https://www.916arw.afrc.af.mil/News/Article-Display/Article/166514/dod-announces-termination-of-kc-x-tanker-solicitation/ . 11 January 2024 . 12 September 2008 . live.
- Web site: Cole . August . Sanders . Peter . Air Force Resumes Tanker Contest . Wall Street Journal . https://archive.today/20240111022159/https://www.wsj.com/articles/SB125383323357539115 . 11 January 2024 . 25 September 2009 . dead.
- Web site: 20 April 2010 . Avions ravitailleurs : EADS va soumettre une offre en solo . dead . http://web.archive.org/web/20100422025104/http://www.latribune.fr/entreprises/industrie/aeronautique-defense/20100419trib000500407/avions-ravitailleurs-eads-va-soumettre-une-offre-en-solo.html . 22 April 2010 . La Tribune . French.
- Web site: Trimble . Stephen . 4 March 2011 . EADS concedes KC-X contract award to Boeing . dead . https://web.archive.org/web/20220924160724/https://www.flightglobal.com/eads-concedes-kc-x-contract-award-to-boeing/98681.article . 24 September 2022 . FlightGlobal.
- Web site: Cook . Dan . 1 May 2002 . Boeing Given Nod on Tanker Lease . live . https://web.archive.org/web/20231225204519/https://military-aerospace-technology.com/article.cfm?DocID=335 . 25 December 2023 . military-aerospace-technology.com.
- Web site: Tirpak . John A. . 1 February 2004 . Tanker Twilight Zone . live . https://web.archive.org/web/20230421013925/https://www.airandspaceforces.com/article/0204tanker/ . 21 April 2023 . Air & Space Forces Magazine.
- News: Cahlink . George . 1 October 2004 . Ex-Pentagon procurement executive gets jail time . live . https://web.archive.org/web/20221108095404/https://www.govexec.com/defense/2004/10/ex-pentagon-procurement-executive-gets-jail-time/17737/ . 8 November 2022 . 21 December 2006 . Govexec.com.
- Web site: Palmer . Kimberly . 3 October 2005 . Former Air Force acquisition official released from jail . live . https://web.archive.org/web/20180827115312/https://www.govexec.com/federal-news/2005/10/former-air-force-acquisition-official-released-from-jail/20340/ . 27 August 2018 . Government Executive.
- Web site: Holmes . Stanley . 15 December 2003 . Boeing: What Really Happened . subscription . live . https://archive.today/20200625191738/https://www.bloomberg.com/news/articles/2003-12-14/boeing-what-really-happened . 25 June 2020 . Bloomberg.
- Web site: Leung . Rebecca . 4 January 2005 . Cashing In For Profit? . live . https://web.archive.org/web/20230206044241/https://www.cbsnews.com/news/cashing-in-for-profit/ . 6 February 2023 . CBS News.
- Web site: 30 June 2006 . Boeing to Pay United States Record $615 Million to Resolve Fraud Allegations . live . https://web.archive.org/web/20230820171447/https://www.justice.gov/archive/opa/pr/2006/June/06_civ_412.html . 20 August 2023 . U.S. Department of Justice.
- Web site: Majumdar . Dave . 24 February 2011 . Boeing wins KC-X tanker battle . dead . https://archive.today/20120721215931/http://www.airforcetimes.com/news/2011/02/defense-boeing-win-tanker-contract-022411/#selection-507.0-507.30 . 21 July 2012 . Air Force Times.
- Web site: 30 January 2007 . Air Force Posts KC-X Request for Proposals . live . https://web.archive.org/web/20240111020614/https://www.af.mil/News/Article-Display/Article/140738/air-force-posts-kc-x-request-for-proposals/ . 11 January 2024 . 1 July 2011 . U.S. Air Force.
- Web site: Northrop Grumman KC-30 marketing web site . 16 February 2007 . . https://web.archive.org/web/20070212054705/http://www.northropgrumman.com/kc30/ . 12 February 2007 . dead .
- Web site: Boeing Offers KC-767 Advanced Tanker to U.S. Air Force . 12 February 2007 . 8 September 2008 . Boeing . dead . https://web.archive.org/web/20070214105112/http://www.boeing.com/news/releases/2007/q1/070212b_nr.html . 14 February 2007 .
- News: Borak . Donna . 13 February 2007 . Boeing Tweaks 767 for Tanker . 8 September 2008 . The Seattle Times.
- Web site: 11 April 2007 . Boeing Submits KC-767 Advanced Tanker Proposal to U.S. Air Force . dead . https://web.archive.org/web/20070521163650/http://www.boeing.com/news/releases/2007/q2/070411b_nr.html . 21 May 2007 . Boeing.
- Web site: 10 April 2007 . Northrop Grumman Submits KC-X Tanker Proposal to U.S. Air Force Early . dead . https://web.archive.org/web/20070927175842/http://www.irconnect.com/noc/press/pages/news_releases.html?d=117090 . 27 September 2007 . Northrop Grumman.
- Web site: 20 September 2007 . Dual Sourcing Tanker Unfeasible, Wynne Says . live . https://web.archive.org/web/20230820171453/https://abcnews.go.com/Technology/story?id=3630041&page=1 . 20 August 2023 . ABC News.
- Web site: Talbot . George . 7 December 2007 . Boeing, Northrop vying for KC-10 service deal . dead . https://web.archive.org/web/20071224214531/http://www.al.com/business/mobileregister/index.ssf?%2Fbase%2Fbusiness%2F1197023159104310.xml&coll=3 . 24 December 2007 . al.com.
- Web site: 3 March 2008 . New tanker to bring increased capabilities to warfighter . live . https://web.archive.org/web/20240111030335/https://www.af.mil/News/Article-Display/Article/124218/new-tanker-to-bring-increased-capabilities-to-warfighter/ . 11 January 2024 . U.S. Air Force.
- Web site: 4 January 2008 . Boeing, Northrop Submit Final Tanker Proposals To USAF . dead . https://web.archive.org/web/20110927185334/http://www.aviationweek.com/aw/generic/story.jsp?id=news%2FKCX010407.xml&headline=Boeing%2C%20Northrop%20Submit%20Final%20Tanker%20Proposals%20To%20USAF&channel=defense . 27 September 2011 . Aviation Week.
- Web site: Cole . August . 1 March 2008 . Boeing Loses Big Air Force Deal . dead . https://archive.today/20231224222530/https://www.wsj.com/articles/SB120432006746103635 . 24 December 2023 . The Wall Street Journal.
- Web site: 11 March 2008 . Boeing Protests U.S. Air Force Tanker Contract Award . live . https://web.archive.org/web/20231227081952/https://boeing.mediaroom.com/2008-03-11-Boeing-Protests-U-S-Air-Force-Tanker-Contract-Award . 27 December 2023 . Boeing.
- Web site: 12 March 2008 . Air Force officials respond to Boeing protest . live . https://web.archive.org/web/20211205135744/https://www.af.mil/News/Article-Display/Article/124131/air-force-officials-respond-to-boeing-protest/ . 5 December 2021 . U.S. Air Force.
- Web site: Statement Regarding the Bid Protest Decision Resolving the Aerial Refueling Tanker Protest by the Boeing Company . . 18 June 2008 . 18 June 2008 . https://web.archive.org/web/20080625201918/http://www.king5.com/sharedcontent/northwest/pdf/gao_boeing.pdf . 25 June 2008.
- Web site: Kruzel . John J. . Pentagon officials reopen bidding on tanker contract . U.S. Air Force . https://web.archive.org/web/20240111021401/https://www.af.mil/News/Article-Display/Article/123052/pentagon-officials-reopen-bidding-on-tanker-contract/ . 11 January 2024 . 9 July 2008 . live.
- Web site: Butler . Amy . 6 August 2008 . Pentagon Issues New Tanker Bid Parameters . dead . https://web.archive.org/web/20120307145815/http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/REVISED08068.xml . 7 March 2012 . Aviation Week.
- News: 6 August 2008 . Pentagon Reopens Bidding for Aerial Tankers and Refines Expectations . live . https://web.archive.org/web/20230820171447/https://www.nytimes.com/2008/08/07/business/07tanker.html . 20 August 2023 . The New York Times . Associated Press.
- Web site: Pasztor . Andy . 7 August 2008 . Boeing Says Bidding Changes Favor European Tanker Team . dead . https://archive.today/20240111031451/https://www.wsj.com/articles/SB121805700442018139 . 11 January 2024 . The Wall Street Journal.
- Web site: Butler . Amy . Fulghum . David A. . 11 August 2008 . Boeing Leaning Toward Not Re-bidding KC-X . dead . https://web.archive.org/web/20120307145427/http://www.aviationweek.com/aw/generic/story.jsp?id=news/BOEING081108.xml&channel=defense . 7 March 2012 . Aviation Week.
- Hedgpeth. "Tanker Bid Moves Toward Endgame"
- Web site: Shalal-Esa . Andrea . 3 September 2008 . US Air Force general urges quick action on tanker . live . https://archive.today/20240111033804/https://www.reuters.com/article/idUSN03515556/ . 11 January 2024 . Reuters.
- Web site: 10 September 2008 . The USAF's KC-X Aerial Tanker RFP: Canceled . https://web.archive.org/web/20080917115622/http://www.defenseindustrydaily.com/the-usafs-kcx-aerial-tanker-rfp-03009/ . 17 September 2008 . Defense Industry Daily.
- Web site: Hedgpeth . Dana . 11 September 2008 . Pentagon Postpones Tanker Competition . live . https://web.archive.org/web/20110604145103/http://www.washingtonpost.com/wp-dyn/content/article/2008/09/10/AR2008091000986.html?hpid=sec-business . 4 June 2011 . The Washington Post.
- Web site: Cole . August . Lunsford . J. Lynn . 11 September 2008 . Boeing Gets Reprieve in Fuel-Tanker Contest . dead . https://archive.today/20240111034028/https://www.wsj.com/articles/SB122105210879619199#selection-4132.0-4132.1 . 11 January 2024 . The Wall Street Journal.
- News: Lyle . Amaani . 16 September 2009 . SecDEF announces return of KC-X program . live . https://web.archive.org/web/20230114065126/https://www.af.mil/News/Article-Display/Article/119141/secdef-announces-return-of-kc-x-program/ . 14 January 2023 . 17 June 2016 . U.S. Air Force.
- Web site: Wolf . Jim . Shalal-Esa . Andrea . 24 September 2009 . Pentagon's new tanker rules exclude trade fight . live . https://archive.today/20240111035020/https://www.reuters.com/article/uk-usa-tanker/pentagons-new-tanker-rules-exclude-trade-fight-idUKTRE58N4Y520090924/ . 11 January 2024 . Reuters.
- Web site: 25 September 2009 . KC-X Tanker Modernization Program . govtribe.com.
- Web site: Drew . Christopher . 24 September 2009 . $35 Billion Tanker Contract Opens . live . https://web.archive.org/web/20230820171447/https://www.nytimes.com/2009/09/25/business/25tanker.html . 20 August 2023 . The New York Times.
- Web site: Dunlop . Michelle . 25 September 2009 . Boeing-Airbus tanker battle resumes today . live . https://web.archive.org/web/20230820171631/https://www.heraldnet.com/news/boeing-airbus-tanker-battle-resumes-today/ . 20 August 2023 . Herald.net.
- Web site: Shalal-Esa . Andrea . 27 October 2009 . Alabama lawmakers say Pentagon tanker rules unfair . live . https://web.archive.org/web/20230820171445/https://www.reuters.com/article/domesticNews/idUSTRE59Q50F20091027/?pageNumber=1&virtualBrandChannel=11604 . 20 August 2023 . Reuters.
- Web site: Shalal-Esa . Andrea . 1 December 2009 . Northrop threatens to boycott US tanker contest . live . https://web.archive.org/web/20230820171446/https://www.reuters.com/article/AIRDEF/idUSN0151336920091201/?sp=true . 20 August 2023 . Reuters.
- Web site: DiMascio . Jen . 1 December 2009 . Northrop may withdraw tanker bid . live . https://web.archive.org/web/20230820171510/https://www.politico.com/story/2009/12/northrop-may-withdraw-tanker-bid-030076 . 20 August 2023 . Politico.
- Web site: Tiron . Roxanna . 1 December 2009 . Northrop Grumman threatens to quit competition for tanker . live . https://web.archive.org/web/20240111040351/https://thehill.com/news-by-subject/defense-homeland-security/55832-northrop-grumman-threatens-to-quit-competition-for-tanker/ . 11 January 2024 . The Hill.
- Web site: Garamone . Jim . 1 February 2010 . Budget request continues defense reform agenda . live . https://web.archive.org/web/20240111040705/https://www.af.mil/News/Article-Display/Article/117766/budget-request-continues-defense-reform-agenda/ . 11 January 2024 . U.S. Air Force.
- Web site: Reed . John . 25 February 2010 . USAF Sets KC-X First Flight, IOC Dates . dead . https://archive.today/20120529195044/http://www.defensenews.com/story.php . 29 May 2012 . Defense News.
- Web site: Ostrower . Jon . Northrop Grumman declines to bid on latest KC-X RFP . FlightGlobal . https://web.archive.org/web/20240111022901/https://www.flightglobal.com/northrop-grumman-declines-to-bid-on-latest-kc-x-rfp/92376.article . 11 January 2024 . en . 9 March 2010 . dead.
- Web site: Wall . Robert . 10 March 2010 . No Solo KC-X Bid For EADS . subscription . https://web.archive.org/web/20240111023401/https://aviationweek.com/no-solo-kc-x-bid-eads . 11 January 2024 . Aviation Week.
- Web site: 20 April 2010 . EADS North America Intends to Submit Proposal for U.S. Air Force Tanker . Defense-Aerospace.
- Web site: Rolph . Amy . 21 June 2010 . Air Force delays tanker contract . live . https://web.archive.org/web/20240111041456/https://www.heraldnet.com/business/air-force-delays-tanker-contract/ . 11 January 2024 . Herald.net.
- Web site: Bennett . John T. . 2 July 2010 . In KC-X Twist, Ukrainian Aircraft Maker, U.S. Aerospace Readying Bid . dead . https://archive.today/20130121082308/http://www.defensenews.com/story.php?i=4695743&c=EUR&s=AIR . 21 January 2013 . Defense News.
- Web site: Trimble . Stephen . 2 July 2010 . US company partners with Antonov in surprise KC-X bid . dead . https://web.archive.org/web/20100708032339/http://www.flightglobal.com:80/articles/2010/07/02/343992/us-company-partners-with-antonov-in-surprise-kc-x-bid.html . 8 July 2010 . 2 July 2010 . FlightGlobal.
- Web site: Trimble . Stephen . 5 August 2010 . US Aerospace appeals against KC-X exclusion, blames USAF ‘conspiracy’ . dead . https://web.archive.org/web/20100919151919/http://www.flightglobal.com:80/articles/2010/08/05/345811/us-aerospace-appeals-against-kc-x-exclusion-blames-usaf.html . 19 September 2010 . FlightGlobal.
- Web site: Trimble . Stephen . 9 July 2010 . USAF receives three proposals for KC-X, but Antonov team admits concerns . dead . https://web.archive.org/web/20101221065048/http://www.flightglobal.com:80/articles/2010/07/09/344276/usaf-receives-three-proposals-for-kc-x-but-antonov-team-admits.html . 21 December 2010 . FlightGlobal.
- Web site: Butler . Amy . 7 September 2010 . U.S. Aerospace Files Second KC-X Protest . subscription . Aviation Week.
- Web site: KC-X Bidder Dialogue Begins Despite Protest. AVIATION WEEK. 13 August 2010. Amy Butler. 12 August 2010.
- Web site: Wolf . Jim . 6 October 2010 . Auditors reject U.S. Aerospace tanker bid protest . live . https://archive.today/20240111042634/https://www.reuters.com/article/tanker-usa-gao-idCNN0627261920101006/ . 11 January 2024 . Reuters.
- Web site: Drew . Christopher . 30 November 2010 . Air Force Acts to Fix Error in Tanker Bid . live . https://web.archive.org/web/20210507023156/https://www.nytimes.com/2010/12/01/business/advertisingemail/01tanker.html . 7 May 2021 . The New York Times.
- Web site: Wolf . Jim . 20 November 2010 . US Air Force delays tanker pick, mixes up documents . live . https://archive.today/20240111042854/https://www.reuters.com/article/idUSN1921476620101120/ . 11 January 2024 . Reuters.
- Web site: Gates . Dominic . 11 February 2011 . Boeing, EADS submit final bids for Air Force tanker contract . live . https://web.archive.org/web/20160401183636/https://www.seattletimes.com/business/boeing-aerospace/boeing-eads-submit-final-bids-for-air-force-tanker-contract/ . 1 April 2016 . The Seattle Times.
- Web site: Eshel . Tamir . 24 February 2011 . Boeing Wins the U.S. Air Force KC-X Program . live . https://web.archive.org/web/20230610174233/https://defense-update.com/20110224_boeing_wins_kcx.html . 10 June 2023 . Defense-Update.
- Web site: Gates . Dominic . 4 March 2011 . Rival knocks Boeing’s ‘lowball’ tanker bid . live . https://web.archive.org/web/20220516143311/https://www.seattletimes.com/business/rival-knocks-boeings-lowball-tanker-bid/ . 16 May 2022 . The Seattle Times.
- Web site: Munoz . Carlo . 9 January 2012 . Hill Questions Boeing Plant Closure . live . https://web.archive.org/web/20200617060005/https://breakingdefense.com/2012/01/hill-questions-boeing-plant-closure-hearings-possible/ . 17 June 2020 . Breaking Defense.
- Web site: KC-Y – KC-10 Replacement . live . https://web.archive.org/web/20230926015435/https://www.globalsecurity.org/military/systems/aircraft/kc-y.htm . 26 September 2023 . 11 October 2019 . Global Security.
- Web site: Insinna . Valerie . 29 November 2016 . KC-Y Competition Still Under Consideration as Air Force Works to Define Future Tanker Fleet . live . https://archive.today/20171031063042/https://www.defensenews.com/air/2016/11/29/kc-y-competition-still-under-consideration-as-air-force-works-to-define-future-tanker-fleet/ . 31 October 2017 . Defense News.
- Web site: Trevithick . Joseph . 20 August 2018 . Lockheed Martin Is Crafting New Stealth and Drone Tanker Concepts for the USAF . live . https://web.archive.org/web/20230629090858/https://www.thedrive.com/the-war-zone/23723/lockheed-martin-is-crafting-new-stealth-and-drone-tanker-concepts-for-the-usaf . 29 June 2023 . The Drive.
- Web site: Hitchens . Theresa . 1 February 2023 . Air Force wants its next-gen tanker flying by 2040 . live . https://web.archive.org/web/20230816225225/https://breakingdefense.com/2023/02/air-force-wants-its-next-gen-tanker-flying-by-2040/ . 16 August 2023 . Breaking Defense.
- Web site: Trevithick . Joseph . 26 January 2023 . Stealthy Tanker-Transport Aircraft Concept Unveiled By Boeing . live . https://web.archive.org/web/20230928085430/https://www.thedrive.com/the-war-zone/stealthy-tanker-transport-aircraft-concept-unveiled-by-boeing . 28 September 2023 . The Drive.
- Web site: KC-30 Brochure . Northrop Grumman . https://web.archive.org/web/20091128030203/http://www.as.northropgrumman.com/products/kc45tanker/assets/KC30_QuadFold.pdf . 28 November 2009 . 28 November 2009 . dead.
- Web site: KC-30 Specifications . Northrop Grumman . https://web.archive.org/web/20071224161547/http://www.northropgrumman.com/kc30/performance/specifications.html . 24 December 2007 . 24 December 2007 . dead.
- Web site: A330-200 Specification . Airbus . https://web.archive.org/web/20080304140424/http://www.airbus.com/en/aircraftfamilies/a330a340/a330-200/specifications.html . 4 March 2008 . 4 March 2008 . dead.
- Web site: KC-767 Advanced Tanker . Boeing . https://web.archive.org/web/20080528120519/http://www.boeing.com/ids/globaltanker/usaf/KC_767/767AdvProdCard.pdf . 28 May 2008 . 28 May 2008 . dead.
- Frawley, Gerard. The International Directory of Civil Aircraft, 2003–2004. Aerospace Publications Pty Ltd, 2003. .
- Web site: A330 MRTT Specification . Airbus Military . https://web.archive.org/web/20140407082138/http://www.airbusmilitary.com/Aircraft/A330MRTT/A330MRTTSpec.aspx . 7 April 2014 . 7 April 2014 . dead.
- Web site: 14 July 2010 . Стали известны подробности проекта Ан-112КС . Details of the AN-112KS project have become known . live . https://web.archive.org/web/20230820171508/https://www.wing.com.ua/content/view/7600/38/ . 20 August 2023 . Wing.com.ua . ru-RU.
- Web site: C-135 Stratolifter / KC-135 Stratotanker . live . https://web.archive.org/web/20231223230734/https://aerospaceweb.org/aircraft/transport-m/c135/ . 23 December 2023 . aerospaceweb.org.
- Web site: KC-45 Tanker . dead . https://web.archive.org/web/20081227130154/http://www.is.northropgrumman.com:80/systems/kc30tanker.html . 27 December 2008 . Northrop Grumman Integrated Systems.
- Web site: Factsheets : KC-135 Stratotanker . 16 June 2016 . https://web.archive.org/web/20141024025708/http://www.af.mil/AboutUs/FactSheets/Display/tabid/224/Article/104524/kc-135-stratotanker.aspx . 24 October 2014 . dead.