Lunar Rover Had An Engine Muffler -Ran on Fuel in The Fake Moon Bay -An Engine Needs Oxygen To Burn The Fuel -It Will Not Work in A Vacuum Environment As On The Real Moon. This video as you hear see it, is located for download at NASA site: http://history.nasa.gov/alsj/a17/video17.html Apollo 17 Video Library ALSEP Deployment Journal Text