This article is a list of aircraft that were proposed and but never left the drawing board or never made it into production.
- ^ "Boeing Offers New 747-400X Quiet Longer Range Jetliner." The Boeing Company, February 26, 2002. Retrieved: December 17, 2007.
- ^ "GE's CF6 Engine Models Tailored For Boeing's 747-400XQLR Wide-Body." Archived June 11, 2009, at the Wayback Machine GE Aviation, March 25, 2002.
- ^ Steinke, Sebastian. "Boeing Proposes 747-400X Quiet Longer Range." Flug Revue Online, May 2002. Retrieved: July 15, 2011.
- ^ Kingsley-Jones, Max. "IN FOCUS: Boeing 747-8 technical description & cutaway". Flight Global, November 13, 2012.
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- ^ Sherwell, Chris (January 15, 1986). "Boeing plans propfan engines for bigger jumbos in 1990s" (PDF). Financial Times. No. 29829. Singapore. p. 1.
- ^ Patterson, James W. "Impact of New Large Aircraft on Airport Design (PDF)." Federal Aviation Administration, March 1998. Retrieved: December 17, 2007.
- ^ a b "Boeing Outlines the "Value" of Its 747 Plans". The Boeing Company. September 2, 1996. Archived from the original on October 24, 2008. Retrieved June 7, 2011.
- ^ "Boeing offers 747ASB" (PDF). Flight International. June 7, 1986. Archived (PDF) from the original on October 9, 2022. Retrieved October 6, 2012.
- ^ Francillon (1990), p. 271
- ^ Francillon (1990), p. 417
- ^ Waddington 2000, p. 89.
- ^ "DC-10 Twin briefing" (PDF). Flight International. June 7, 1973. Archived from the original (PDF) on April 11, 2018.
- ^ Thomas, Geoffrey (2023-02-08). "How McDonnell Douglas missed the Big Twin and disappeared". Airline Ratings. Archived from the original on April 1, 2023. Retrieved 2023-06-02.
- ^ Steffen, Arthur (2002), McDonnell Douglas MD-11: A Long Beach Swansong, UK: Midland: Hinckley, pp. 92–94, ISBN 1-85780-117-2
- ^ a b Haggerty, James J. (1987-08-01). Toward future flight. Spinoff. pp. 30–33. hdl:2060/19880002195. OCLC 17914180. Archived from the original on April 12, 2009.
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- ^ Ramsden, J. M. (February 22, 1986). Propfans—'the genie is out of the bottle' (PDF). Vol. 129. New Delhi, India. p. 8. ISSN 0015-3710. Archived from the original (PDF) on December 7, 2019. Retrieved May 17, 2019.
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