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Questions regarding equipment used to propel a spacecraft or a rocket. Questions about attitude control jets should be tagged "attitude".

13 votes

How do satellite motors keep themselves cool and lubricated?

In short, the engines in space have fewer moving parts that require constant lubrication and tend to be used for a few quick burns now and then. … In cars and most vehicles on Earth we tend to use reciprocating internal combustion engines. …
Andrew Micallef's user avatar