Aviation fuel: Difference between revisions

[[Compressed natural gas]] (CNG) and [[Liquefied natural gas#Transportation|liquified natural gas]] (LNG) are fuel feedstocks that aircraft may use in the future. Studies have been done on the feasibility of using natural gas<ref>{{cite web|url=http://lae.mit.edu/aircraft-design/|title=Aircraft Design - MIT Laboratory for Aviation and the Environment|access-date=27 December 2016|url-status=dead|archive-url=https://web.archive.org/web/20161230163921/http://lae.mit.edu/aircraft-design/|archive-date=2016-12-30}}</ref> and include the "SUGAR Freeze" aircraft under NASA's N+4 Advanced Concept Development program (made by Boeing's Subsonic Ultra Green Aircraft Research (SUGAR) team). The [[Tupolev Tu-155]] was an alternative fuel testbed which was fuelled on LNG.<ref>{{cite web|url=http://midwestenergynews.com/2013/08/26/could-natural-gas-fuel-commercial-flights-of-the-future/|title=Could natural gas fuel commercial flights of the future?|last=EnergyWire|access-date=2016-12-27|url-status=live|archive-url=https://web.archive.org/web/20161105204049/http://midwestenergynews.com/2013/08/26/could-natural-gas-fuel-commercial-flights-of-the-future/|archive-date=2016-11-05}}</ref> The low [[specific energy]] of natural gas even in liquid form compared to conventional fuels gives it a distinct disadvantage for flight applications.{{citation needed|date=March 2018}}