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Picking up fuel along the way — the [[Bussard Ramjet|ramjet]] approach — will lose efficiency as the space craft's speed increases rela ...[A World Out of Time]]'', Jerome Branch Corbell (for himself), "takes" a [[ramjet]] to the [[Galactic Center]] and back in 150 years ships time (most of it i ...

...rt description|External mixture preparation system for internal combustion engines}} ...ually, this mixture is relatively homogeneous, and, at least in production engines for passenger cars, approximately [[stochiometry|stoichiometric]]; this mea ...

...minated by combustion products. Working fluids for ''external'' combustion engines include air, hot water, [[pressurized water reactor|pressurized water]] or ...r of the diesel engine, [[Rudolf Diesel]], was using peanut oil to run his engines.<ref>{{cite journal |last1=Shay |first1=E.Griffin |title=Diesel fuel from v ...

...[[altitude]]s. It belongs to the class of [[altitude compensating nozzle]] engines. A vehicle with an aerospike engine uses 25–30% less fuel at low altitudes, ...ble from typically used arcjet engines are very low compared with chemical engines. ...