Advanced Tactical Fighter: Difference between revisions
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===Background=== |
===Background=== |
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In 1981, USAF began forming requirements for a new air superiority fighter intended to replace the capability of the [[McDonnell Douglas F-15 Eagle|F-15 Eagle]]. In June 1981 a request for information (RFI) for the Advanced Tactical Fighter (ATF) was published by the Air Force. Design concepts were provided by [[defense contractor]]s. The common areas among the concepts were [[Stealth technology|Stealth]], [[STOL]] and [[supercruise]].<ref name=Sweetman_p12>Sweetman 1991, pp. 12–13.</ref> It was envisioned that the ATF would incorporate emerging technologies including advanced alloys and [[composite material]], advanced [[fly-by-wire]] flight control systems, higher power propulsion systems, and low-observable, or [[stealth technology]].<ref name="USAF museum">[http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2382 YF-22 fact sheet]. National Museum.</ref> |
In 1981, USAF began forming requirements for a new air superiority fighter intended to replace the capability of the [[McDonnell Douglas F-15 Eagle|F-15 Eagle]]. In June 1981 a request for information (RFI) for the Advanced Tactical Fighter (ATF) was published by the Air Force. Design concepts were provided by [[defense contractor]]s. The common areas among the concepts were [[Stealth technology|Stealth]], [[STOL]] and [[supercruise]].<ref name=Sweetman_p12>Sweetman 1991, pp. 12–13.</ref> It was envisioned that the ATF would incorporate emerging technologies including advanced alloys and [[composite material]], advanced [[fly-by-wire]] flight control systems, higher power propulsion systems, and low-observable, or [[stealth technology]].<ref name="USAF museum">[http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2382 YF-22 fact sheet] {{wayback|url=http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2382 |date=20120119223134 }}. National Museum.</ref> |
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[[File:F-22 RFI.jpg|thumb|upright=1.25|Diagram of several designs submitted for request for information (RFI)]] |
[[File:F-22 RFI.jpg|thumb|upright=1.25|Diagram of several designs submitted for request for information (RFI)]] |
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A request for proposals (RFP) for the fighter was issued in September 1985.<ref name="USAF museum" /><ref name=Sweetman_p14>Sweetman 1991, p. 14.</ref> In May 1986, the Air Force changed the RFP so that final selection would involve flying prototypes.<ref name=Miller_p14>Miller 2005, p. 14.</ref> In July 1986, proposals were provided by [[Boeing]], [[General Dynamics]], [[Lockheed Corporation|Lockheed]], [[Northrop Corporation|Northrop]], and [[McDonnell Douglas]].<ref name=Miller_p14-9/> Two contractors, Lockheed and Northrop were selected in October 1986 to undertake a 50-month demonstration/validation phase, culminating in the flight test of two technology demonstrator prototypes, the [[Lockheed YF-22|YF-22]] and the [[Northrop YF-23|YF-23]]. Under terms of agreements between Lockheed, General Dynamics, and Boeing, the companies agreed to participate in the development jointly if only one company's design was selected. Northrop and McDonnell Douglas had a similar agreement.<ref name=Miller_p19-0>Miller 2005, pp. 19-20.</ref> |
A request for proposals (RFP) for the fighter was issued in September 1985.<ref name="USAF museum" /><ref name=Sweetman_p14>Sweetman 1991, p. 14.</ref> In May 1986, the Air Force changed the RFP so that final selection would involve flying prototypes.<ref name=Miller_p14>Miller 2005, p. 14.</ref> In July 1986, proposals were provided by [[Boeing]], [[General Dynamics]], [[Lockheed Corporation|Lockheed]], [[Northrop Corporation|Northrop]], and [[McDonnell Douglas]].<ref name=Miller_p14-9/> Two contractors, Lockheed and Northrop were selected in October 1986 to undertake a 50-month demonstration/validation phase, culminating in the flight test of two technology demonstrator prototypes, the [[Lockheed YF-22|YF-22]] and the [[Northrop YF-23|YF-23]]. Under terms of agreements between Lockheed, General Dynamics, and Boeing, the companies agreed to participate in the development jointly if only one company's design was selected. Northrop and McDonnell Douglas had a similar agreement.<ref name=Miller_p19-0>Miller 2005, pp. 19-20.</ref> |
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Because of the added weight for thrust vectoring/reversing nozzles and related systems on the [[McDonnell Douglas F-15 STOL/MTD|F-15 S/MTD]] research aircraft, the Air Force changed the runway length requirement to {{convert|3000|ft|m|sigfig=2}} and removed the thrust reversers on the ATF in late 1987.<ref name=Sweetman_p23>Sweetman 1991, p. 23.</ref><ref name=Miller_p23>Miller 2005, p. 23.</ref> Two examples of each prototype were built for the Demonstration-Validation phase: one with [[General Electric YF120]] engines, the other with [[Pratt & Whitney F119|Pratt & Whitney YF119]] engines.<ref name="USAF museum" /><ref>[http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2383 YF-23 fact sheet]. National Museum.</ref> |
Because of the added weight for thrust vectoring/reversing nozzles and related systems on the [[McDonnell Douglas F-15 STOL/MTD|F-15 S/MTD]] research aircraft, the Air Force changed the runway length requirement to {{convert|3000|ft|m|sigfig=2}} and removed the thrust reversers on the ATF in late 1987.<ref name=Sweetman_p23>Sweetman 1991, p. 23.</ref><ref name=Miller_p23>Miller 2005, p. 23.</ref> Two examples of each prototype were built for the Demonstration-Validation phase: one with [[General Electric YF120]] engines, the other with [[Pratt & Whitney F119|Pratt & Whitney YF119]] engines.<ref name="USAF museum" /><ref>[http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2383 YF-23 fact sheet] {{wayback|url=http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2383 |date=20110716073256 }}. National Museum.</ref> |
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The first YF-23 made its maiden flight on 27 August 1990 and the first YF-22 first flew on 29 September 1990.<ref name=Goodall_p99>Goodall 1992, p. 99.</ref> Flight testing began afterwards and added the second aircraft for each competitor in late October 1990.<ref name=Miller_p38-9/> The first YF-23 with P&W engines supercruised at Mach 1.43 on 18 September 1990 and the second YF-23 with GE engines reached Mach 1.6 on 29 November 1990.<ref name=Miller_p38-9/> The YF-22 with GE engines achieved Mach 1.58 in supercruise.<ref name="Goodall_p102-3">Goodall 1992, pp. 102–103.</ref> Flight testing continued until December 1990. Following flight testing, the contractor teams submitted proposals for ATF production.<ref name=Miller_p38-9>Miller 2005, pp. 38-39.</ref> |
The first YF-23 made its maiden flight on 27 August 1990 and the first YF-22 first flew on 29 September 1990.<ref name=Goodall_p99>Goodall 1992, p. 99.</ref> Flight testing began afterwards and added the second aircraft for each competitor in late October 1990.<ref name=Miller_p38-9/> The first YF-23 with P&W engines supercruised at Mach 1.43 on 18 September 1990 and the second YF-23 with GE engines reached Mach 1.6 on 29 November 1990.<ref name=Miller_p38-9/> The YF-22 with GE engines achieved Mach 1.58 in supercruise.<ref name="Goodall_p102-3">Goodall 1992, pp. 102–103.</ref> Flight testing continued until December 1990. Following flight testing, the contractor teams submitted proposals for ATF production.<ref name=Miller_p38-9>Miller 2005, pp. 38-39.</ref> |
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===Selection=== |
===Selection=== |
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Following a review of the flight test results and proposals, the Air Force announced the Lockheed YF-22 with Pratt & Whitney engines as the competition winner on 23 April 1991.<ref name=Miller_p38>Miller 2005, p. 38.</ref> The YF-23 design was stealthier and faster, but the YF-22 was more agile.<ref name=Goodall_p110>Goodall 1992, p. 110.</ref> The US Navy had begun considering a version of the ATF called [[Navy Advanced Tactical Fighter]] (NATF) in 1986.<ref name=Pace_p19-22>Pace 1999, pp. 19-22.</ref> It has been speculated in the aviation press that the YF-22 was also seen as more adaptable to the NATF.<ref name=Vector_F-22>[http://www.vectorsite.net/avf22.html The Lockheed Martin F/A-22 Raptor]. Vectorsite.net, 1 February 2007.</ref> The Navy abandoned NATF by 1992.<ref name=Miller_p76>Miller 2005, p. 76.</ref> |
Following a review of the flight test results and proposals, the Air Force announced the Lockheed YF-22 with Pratt & Whitney engines as the competition winner on 23 April 1991.<ref name=Miller_p38>Miller 2005, p. 38.</ref> The YF-23 design was stealthier and faster, but the YF-22 was more agile.<ref name=Goodall_p110>Goodall 1992, p. 110.</ref> The US Navy had begun considering a version of the ATF called [[Navy Advanced Tactical Fighter]] (NATF) in 1986.<ref name=Pace_p19-22>Pace 1999, pp. 19-22.</ref> It has been speculated in the aviation press that the YF-22 was also seen as more adaptable to the NATF.<ref name=Vector_F-22>[http://www.vectorsite.net/avf22.html The Lockheed Martin F/A-22 Raptor] {{wayback|url=http://www.vectorsite.net/avf22.html |date=20090106044034 }}. Vectorsite.net, 1 February 2007.</ref> The Navy abandoned NATF by 1992.<ref name=Miller_p76>Miller 2005, p. 76.</ref> |
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The Lockheed team was awarded the contract to develop and build the Advanced Tactical Fighter in August 1991. The YF-22 was modified into the production [[Lockheed Martin F-22 Raptor|F-22 Raptor]] version.<ref name=Miller_p38-46>Miller 2005, pp. 38, 42-46.</ref> The Northrop YF-23 design was later considered by the company for modification as a bomber,<ref name=Miller_p38>Miller 2005, p. 38.</ref> but the proposals have not come to fruition.<ref>Hebert, Adam J. [http://www.airforce-magazine.com/MagazineArchive/Pages/2006/October%202006/10062018.aspx "The 2018 Bomber and Its Friends"]. Air Force magazine, October 2006.</ref> |
The Lockheed team was awarded the contract to develop and build the Advanced Tactical Fighter in August 1991. The YF-22 was modified into the production [[Lockheed Martin F-22 Raptor|F-22 Raptor]] version.<ref name=Miller_p38-46>Miller 2005, pp. 38, 42-46.</ref> The Northrop YF-23 design was later considered by the company for modification as a bomber,<ref name=Miller_p38>Miller 2005, p. 38.</ref> but the proposals have not come to fruition.<ref>Hebert, Adam J. [http://www.airforce-magazine.com/MagazineArchive/Pages/2006/October%202006/10062018.aspx "The 2018 Bomber and Its Friends"]. Air Force magazine, October 2006.</ref> |
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Revision as of 20:33, 4 October 2016
| Advanced Tactical Fighter (ATF) | |
|---|---|
| |
| The YF-22 (foreground) and YF-23 (background) | |
| Project for | Air superiority fighter |
| Requirement | Advanced Tactical Fighter Statement of Operational Need (November 1984) |
| Issued by | United States Air Force |
| Value | $US 86.6 billion when winner was selected[1] |
| Date initiated | June 1981 (RFI) |
| Proposals | proposals from Boeing, General Dynamics, Lockheed, Northrop, and McDonnell Douglas[2] |
| Prototypes | Lockheed YF-22, Northrop YF-23 |
| Date concluded | August 1991 |
| Outcome | YF-22 selected for production as Lockheed Martin F-22 Raptor |
| Related programs | JAFE, NATF, Have Dash II |
The Advanced Tactical Fighter (ATF) was a demonstration and validation program undertaken by the United States Air Force to develop a next-generation air superiority fighter to counter emerging worldwide threats, including Soviet Sukhoi Su-27 and Mikoyan MiG-29 fighters under development in the 1980s.[3] Lockheed and Northrop were selected in 1986 to develop the YF-22 and the YF-23 technology demonstrator aircraft. These aircraft were evaluated in 1991 and the Lockheed YF-22 was selected and later developed into the F-22 Raptor.
History
Background
In 1981, USAF began forming requirements for a new air superiority fighter intended to replace the capability of the F-15 Eagle. In June 1981 a request for information (RFI) for the Advanced Tactical Fighter (ATF) was published by the Air Force. Design concepts were provided by defense contractors. The common areas among the concepts were Stealth, STOL and supercruise.[4] It was envisioned that the ATF would incorporate emerging technologies including advanced alloys and composite material, advanced fly-by-wire flight control systems, higher power propulsion systems, and low-observable, or stealth technology.[5]
In September 1983, study contracts were awarded to seven airframe manufacturers for further definition of their designs. By late 1984, ATF requirements had settled on a fighter with a maximum takeoff weight of 50,000 pounds (23,000 kg), a mission radius of 800 miles (1,300 km), supercruise speed of Mach 1.4-1.5 and the ability to use a 2,000 feet (610 m) runway.[6] A request for proposals (RFP) for the fighter's engine, called the Joint Advanced Fighter Engine (JAFE), was released in May 1983. Pratt & Whitney and General Electric received contracts for the development and production of prototype engines in September 1983.[7]
Request for proposals
A request for proposals (RFP) for the fighter was issued in September 1985.[5][8] In May 1986, the Air Force changed the RFP so that final selection would involve flying prototypes.[9] In July 1986, proposals were provided by Boeing, General Dynamics, Lockheed, Northrop, and McDonnell Douglas.[2] Two contractors, Lockheed and Northrop were selected in October 1986 to undertake a 50-month demonstration/validation phase, culminating in the flight test of two technology demonstrator prototypes, the YF-22 and the YF-23. Under terms of agreements between Lockheed, General Dynamics, and Boeing, the companies agreed to participate in the development jointly if only one company's design was selected. Northrop and McDonnell Douglas had a similar agreement.[10]
Because of the added weight for thrust vectoring/reversing nozzles and related systems on the F-15 S/MTD research aircraft, the Air Force changed the runway length requirement to 3,000 feet (910 m) and removed the thrust reversers on the ATF in late 1987.[11][12] Two examples of each prototype were built for the Demonstration-Validation phase: one with General Electric YF120 engines, the other with Pratt & Whitney YF119 engines.[5][13]
The first YF-23 made its maiden flight on 27 August 1990 and the first YF-22 first flew on 29 September 1990.[14] Flight testing began afterwards and added the second aircraft for each competitor in late October 1990.[15] The first YF-23 with P&W engines supercruised at Mach 1.43 on 18 September 1990 and the second YF-23 with GE engines reached Mach 1.6 on 29 November 1990.[15] The YF-22 with GE engines achieved Mach 1.58 in supercruise.[16] Flight testing continued until December 1990. Following flight testing, the contractor teams submitted proposals for ATF production.[15]
Selection
Following a review of the flight test results and proposals, the Air Force announced the Lockheed YF-22 with Pratt & Whitney engines as the competition winner on 23 April 1991.[17] The YF-23 design was stealthier and faster, but the YF-22 was more agile.[18] The US Navy had begun considering a version of the ATF called Navy Advanced Tactical Fighter (NATF) in 1986.[19] It has been speculated in the aviation press that the YF-22 was also seen as more adaptable to the NATF.[20] The Navy abandoned NATF by 1992.[21]
The Lockheed team was awarded the contract to develop and build the Advanced Tactical Fighter in August 1991. The YF-22 was modified into the production F-22 Raptor version.[22] The Northrop YF-23 design was later considered by the company for modification as a bomber,[17] but the proposals have not come to fruition.[23]
See also
References
Citations
- ^ Pike, John. "History of the F-22 program". Globalsecurity.org, 21 January 2008.
- ^ a b Miller 2005, pp. 14, 19.
- ^ Sweetman 1991, p. 10-11, 21.
- ^ Sweetman 1991, pp. 12–13.
- ^ a b c YF-22 fact sheet Template:Wayback. National Museum.
- ^ Miller 2005, p. 13.
- ^ Sweetman 1991, p. 13.
- ^ Sweetman 1991, p. 14.
- ^ Miller 2005, p. 14.
- ^ Miller 2005, pp. 19-20.
- ^ Sweetman 1991, p. 23.
- ^ Miller 2005, p. 23.
- ^ YF-23 fact sheet Template:Wayback. National Museum.
- ^ Goodall 1992, p. 99.
- ^ a b c Miller 2005, pp. 38-39.
- ^ Goodall 1992, pp. 102–103.
- ^ a b Miller 2005, p. 38.
- ^ Goodall 1992, p. 110.
- ^ Pace 1999, pp. 19-22.
- ^ The Lockheed Martin F/A-22 Raptor Template:Wayback. Vectorsite.net, 1 February 2007.
- ^ Miller 2005, p. 76.
- ^ Miller 2005, pp. 38, 42-46.
- ^ Hebert, Adam J. "The 2018 Bomber and Its Friends". Air Force magazine, October 2006.
Bibliography
- Goodall, James C. "The Lockheed YF-22 and Northrop YF-23 Advanced Tactical Fighters". America's Stealth Fighters and Bombers, B-2, F-117, YF-22, and YF-23. St. Paul, Minnesota: MBI Publishing Company, 1992. ISBN 0-87938-609-6.
- Jenkins, Dennis R. and Tony R. Landis. Experimental & Prototype U.S. Air Force Jet Fighters. North Branch, Minnesota, USA: Specialty Press, 2008. ISBN 978-1-58007-111-6.
- Miller, Jay. Lockheed Martin F/A-22 Raptor, Stealth Fighter. Hinckley, UK: Midland Publishing, 2005. ISBN 1-85780-158-X.
- Pace, Steve. F-22 Raptor. New York: McGraw-Hill, 1999. ISBN 0-07-134271-0.
- Sweetman, Bill. YF-22 and YF-23 Advanced Tactical Fighters. St. Paul, Minnesota: Motorbooks International Publishing, 1991. ISBN 0-87938-505-7.