Date: Around 1993
I have heard that supposed "space plane prototype" that flew over
California and Denmark, and a few other countries. I read an article which
said that it used an engine which ran on liquid methane. Is this the same as
methanol in cars? Also, is this plane's engine a Scramjet (what is this
engine about?), or what?
Methane is a gas from the same "family" that includes butane,
propane, octane, etc. Methanol is an alcohol and a liquid at room
temperature. Liquid methane is cold methane.
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Update: June 2012