Sikorsky S-69 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Sikorsky S-69" in English language version.

refsWebsite

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3web.archive.org

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1ieee.org

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1handle.net

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1dtic.mil

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1vtol.org

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1popularmechanics.com

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1flightglobal.com

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1books.google.com

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1propilotmag.com

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1unicopter.com

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1airliners.net

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1joebaugher.com

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1loc.gov

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1illinois.edu

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airliners.net

Bagai, Ashish. "Sikorsky XH-59A ABC (S-69)." airliners.net, March 29, 2011. Retrieved: June 8, 2011.

books.google.com

Kocivar, Ben. "Turbofan-powered flying carpet" page 68, Popular Science, September 1982. Accessed: September 2014.

dtic.mil

apps.dtic.mil

J. Rudell et al. Advancing Blade Concept (ABC) Technology Demonstrator report: USAAVRADCOM-tr-81-D-5, United States Army Research Laboratory, April 1981. Size: 11 MB. Accessed: 10 March 2012.

flightglobal.com

Croft, John. "Hyper Helos: Prototypes coming off the drawing board and into the race", Flightglobal.com, 3 July 2008. Accessed: 9 March 2012.

handle.net

hdl.handle.net

Felker, Fort III. NASA NASA-TM-81329, USAAVRADCOM-TR-81-A-27 Performance and loads data from a wind tunnel test of a full-scale, coaxial, hingeless rotor helicopter. http://hdl.handle.net/2060/19820004167

ieee.org

spectrum.ieee.org

Lawrence, Thomas; David Jenney (31 Aug 2010). "The Fastest Helicopter on Earth". IEEE Spectrum. Archived from the original on 30 January 2017. Retrieved 1 August 2017. first airframe: the very stiff coaxial rotors produced greater-than-expected nose-up forces when flying forward. The aircraft's control system also turned out to be inadequate. second airframe: 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

illinois.edu

m-selig.ae.illinois.edu

Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.

joebaugher.com

Baugher, Joe. "1972 USAF Serial Numbers." Retrieved: June 8, 2011.

loc.gov

lccn.loc.gov

Harding, Stephen (1997). U.S. Army Aircraft Since 1947. Atglen, PA, USA: Schiffer Publishing Ltd. p. 251. LCCN 96-69996.

popularmechanics.com

Goodier, Rob (September 20, 2010). "Inside Sikorsky's Speed-Record-Breaking Helicopter Technology". Popular Mechanics. Retrieved 22 September 2010.

propilotmag.com

Chandler, Jay. "Advanced rotor designs break conventional helicopter speed restrictions (page 1) Archived July 18, 2013, at the Wayback Machine " Page 2 Archived July 18, 2013, at the Wayback Machine Page 3 Archived July 18, 2013, at the Wayback Machine. ProPilotMag, September 2012. Accessed: 10 May 2014. Archive 1 Archive 2

unicopter.com

Jackson, Dave. "Coaxial - Sikorsky ~ S-69 (XH-59) ABC Archived November 6, 2014, at the Wayback Machine" Unicopter, 9 March 2012. Retrieved: 22 May 2015. Archived on 6 November 2014.

vtol.org

legacy.vtol.org

Robb, Raymond L. Hybrid Helicopters: Compounding the Quest for Speed^{[dead link]} p. 48, Vertiflite, Summer 2006.

web.archive.org

Lawrence, Thomas; David Jenney (31 Aug 2010). "The Fastest Helicopter on Earth". IEEE Spectrum. Archived from the original on 30 January 2017. Retrieved 1 August 2017. first airframe: the very stiff coaxial rotors produced greater-than-expected nose-up forces when flying forward. The aircraft's control system also turned out to be inadequate. second airframe: 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
Chandler, Jay. "Advanced rotor designs break conventional helicopter speed restrictions (page 1) Archived July 18, 2013, at the Wayback Machine " Page 2 Archived July 18, 2013, at the Wayback Machine Page 3 Archived July 18, 2013, at the Wayback Machine. ProPilotMag, September 2012. Accessed: 10 May 2014. Archive 1 Archive 2
Jackson, Dave. "Coaxial - Sikorsky ~ S-69 (XH-59) ABC Archived November 6, 2014, at the Wayback Machine" Unicopter, 9 March 2012. Retrieved: 22 May 2015. Archived on 6 November 2014.