Editing Propyne (section)

==Use as a rocket fuel==
European space companies have researched using light [[hydrocarbons]] with [[liquid oxygen]], a relatively high performing [[liquid rocket propellant]] combination that would also be less toxic than the commonly used MMH/NTO ([[monomethylhydrazine]]/[[nitrogen tetroxide]]). Their research showed{{citation needed|date=September 2013}} that propyne would be highly advantageous as a [[rocket fuel]] for craft intended for [[low Earth orbit]]al operations. They reached this conclusion based upon a [[specific impulse]] expected to reach 370 [[second|s]] with oxygen as the oxidizer, a high [[density]] and [[power density]]—and the moderate [[boiling point]], which makes the chemical easier to store than [[cryogenic fuel]]s that must be kept at extremely low temperatures.<ref>{{Cite web |last1=Valentian |first1=Dominique |last2=Sippel |first2=Martin |last3=Grönland |first3=Tor-Arne |last4=Baker |first4=Adam |last5=van Den Meulen |first5=Jaap |last6=Fratacci |first6=Georges |last7=Caramelli |first7=Fabio |date=2004 |title=Green propellants options for launchers, manned capsules and interplanetary missions |url=http://www.la.dlr.de/ra/sart/publications/pdf/esa02-2004.pdf |url-status=dead |archive-url=https://web.archive.org/web/20060110171612/http://www.la.dlr.de/ra/sart/publications/pdf/esa02-2004.pdf |archive-date=2006-01-10 |website=la.dlr.de |publisher=[[German Aerospace Center|DLR]] Lampoldshausen}}</ref>