西科斯基 X2
參考

↑  "Award-Winning X2 Technology Demonstrator Takes its Final Flight - Program paved the way for upcoming S-97 Raider helicopter" （页面存档备份，存于）, Sikorsky Aircraft Corp., 14 July 2011.
1 2  Connor, Roger. . National Air and Space Museum. 25 October 2016  [5 December 2016]. （原始内容存档于16 May 2020） （英语）. Weight, empty: 2,404 kg (5,300 lb)
↑  Johnson, Wayne.  (PDF). NASA: 4. January 18–20, 2012  [2023-03-20]. （原始内容存档 (PDF)于2023-03-20）. nominal gross weight of 5950 lb.
↑  Drew, James. . Flight Global. 2016-02-19. （原始内容存档于30 August 2020） （英语）. We started with [the] X2 technology demonstrator at about 6,000lbs (2.7t) gross weight.
↑  Walsh, D. . January 2011.
1 2  Jackson, Dave. "Coaxial - Sikorsky ~ X2 TD" Unicopter, 18 September 2010. Accessed: April 2014. Archived on 13 September 2013.
↑  Tomkins, Richard. "Sikorsky powers on S-97 avionics" United Press International, 17 June 2014. Accessed: 19 June 2014. Archived on 18 June 2014.
↑  .   [2023-03-20]. （原始内容存档于2023-03-20）.
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1 2  Goodier, Rob. . Popular Mechanics. September 20, 2010  [22 September 2010]. （原始内容存档于2011-06-29）.
↑  Thomas Lawrence and David Jenney. . IEEE Spectrum. 31 Aug 2010  [1 August 2017]. （原始内容存档于30 January 2017）. the helicopter vibrated so much at these higher speeds that its pilots struggled to control it .. The heavy and fuel-hungry jets pushed the aircraft to high speed
↑  XH-59A / X2 comparison （页面存档备份，存于） IEEE
↑  Sikorsky to Build and Test X2 Technology Demonstrator Helicopter 的存檔，存档日期July 14, 2008，.. Sikorsky
↑  Trimble, Stephen. . FlightGlobal. Reed Business Information. 26 July 2010  [29 July 2010]. （原始内容存档于2010-07-30）.
↑  First Flight Of Sikorsky X2 Demonstrator,  的存檔，存档日期March 7, 2012，. Aviation Week & Space Technology, 27 August 2008. Accessed: 9 March 2012. Archived on 7 March 2012.
↑  Chandler, Jay. "Advanced rotor designs break conventional helicopter speed restrictions (page 1) 的存檔，存档日期July 18, 2013，." Page 2 的存檔，存档日期July 18, 2013，. Page 3 的存檔，存档日期2013-07-18.. ProPilotMag, September 2012. Accessed: 10 May 2014. Archive 1 Archive 2
↑  X2 marks the spot for radical rotor designs （页面存档备份，存于）, Flightglobal.com, 12 June 2007.
↑  Fell, William. . digitaledition.rotorandwing.com. April–May 2018. （原始内容存档于8 May 2019）.
↑  Wilson, J.R. "Defense Interview: Mark Miller" Defense Media Network, 9 September 2011. Accessed: 4 October 2014. Archived on 2 November 2012.
↑  "Sikorsky Innovations Introduces X2 Technology™ Light Tactical Helicopter Simulator （页面存档备份，存于）" Sikorsky PR
↑  Harris, Franklin D. "Rotor Performance at High Advance Ratio: Theory versus Test 的存檔，存档日期2013-02-18." page 119 NASA/CR—2008–215370, October 2008. Accessed: 13 April 2014.
↑  Croft, John. . Flightglobal (Reed Business Information). 20 May 2010  [28 May 2015]. （原始内容存档于28 May 2015）.
1 2  Dubois, Thierry. . Aviation International News. 26 July 2011  [28 May 2015]. （原始内容存档于11 October 2014）.
↑  US 20150125299  "Counter-rotating Rotor System With Stationary Standpipe" PDF （页面存档备份，存于）
↑  Trimble, Stephen. Sikorsky unveils mock-up X2 armed scout （页面存档备份，存于）. Flightglobal.com, 4 May 2009.
1 2  Majumdar, Dave. "Sikorsky and Boeing Team Submit New Army Helicopter Design" - News.USNI.org, 17 June 2014. Accessed: 19 June 2014. Archive
1 2  Sikorsky and Boeing to pitch ‘X-2’-based design for US Army JMR TD effort （页面存档备份，存于） - Flightglobal.com, February 28, 2013
1 2  U.S. Army Selects Bell and Sikorsky/Boeing to Build Prototypes for Next Generation Helicopter Program （页面存档备份，存于） - News.USNI.org, 3 October 2014
↑  Trimble, Stephen. "Sikorsky's X2 speedster completes first flight". Flightglobal.com, 27 August 2008.
↑  Trimble, Stephen. "Sikorsky high-speed X2 prototype starts flight-test phase" （页面存档备份，存于）. Flight International, 2 September 2008.
↑  Lynch, Kerry. "Sikorsky X2 Flies With Engaged Propeller"[] Aviation Week, 13 July 2009. Paywall
↑  Croft, John. "Sikorsky completes third-phase X2 tests with 181kt flight" （页面存档备份，存于）. Flight International, 27 May 2010.
↑  "Rotorcraft Absolute: Speed over a straight 15/25 km course 的存檔，存档日期2013-12-03.". Fédération Aéronautique Internationale (FAI). Note search under E-1 Helicopters and "Speed over a straight 15/25 km course". Accessed: 26 April 2014.
↑  "X2 Technology Demonstrator Achieves 225 Knots, Sets New Top Speed for Helicopter - Target Milestone of 250 Knots Looms in Q3 2010" （页面存档备份，存于）. UTC.com, 15 June 2015.
↑  Croft, John. . Flight International. September 15, 2010  [2010-09-16]. （原始内容存档于2013-10-19）.
↑  Varnon, Rob. . Connecticut Post. May 26, 2010  [2023-03-20]. （原始内容存档于2023-03-20）.
↑  . sikorsky.com. 15 September 2010  [23 September 2010]. （原始内容存档于14 October 2013）.
↑  Finnegan, Joy editor-in-chief. . Rotor & Wing. 1 October 2010  [6 October 2010]. （原始内容存档于2010-10-31）.
↑  Robb, Raymond L. Hybrid Helicopters: Compounding the Quest for Speed[永久] p49, Vertiflite, Summer 2006. Quote: "Ultimately, the XH-59A achieved an incredible 303 mph"
↑  Datta, Anubhav et al. Experimental Investigation and Fundamental Understanding of a Slowed UH-60A Rotor at High Advance Ratios （页面存档备份，存于）, page 2. NASA, 2011. Accessed: April 2014.
↑  D. Walsh, S. Weiner, K. Arifian, T. Lawrence, M. Wilson, T. Millott and R. Blackwell. "High Airspeed Testing of the Sikorsky X2 Technology Demonstrator[永久]" Sikorsky, May 4, 2011. Accessed: October 5, 2013.
↑  Paur, Jason. . WIRED. 15 July 2010  [15 July 2011]. （原始内容存档于2013-07-19）.
↑  . www.militaryaerospace.com. 17 July 2011  [2023-03-20]. （原始内容存档于2021-02-04）.
↑  . Helicopter Association International. Helicopter Association International. 28 October 2016  [5 December 2016]. （原始内容存档于2016-12-20）.