XCOR has just completed tests on a Methane fired pulse engine. This is incredible considering the possibilities and abundance of fuel. Methane can be a bio-fuel as well and if this pans out it has all sorts of space applications. This is truly a phenomenal break thru. But how does all this really work you ask?

Well the XCOR methane engine (3M9 LOX) fires in short rapid fire burst. They use self-pressurizing propellants. Methane is available on many planets and is easily stored for long period…