Realistic Designs NQThe easiest propellant to manufacture is liquid carbon dioxide. It can be produced from the Martian atmosphere using just high pressure (690 kPa) with no cryogenic cooling needed (a 30 horsepower pump will do, requiring 25 kW, or 80 kilowatt hours per metric ton).
Stone WallIf the Glass Cannon believes that the best defense is a good offense, the Stone Wall tries for the reverse. His offense is nothing to write home about, if .
Sterling RailSterling Rail, Inc. Railroad Classified Ads, Buy and Sell Locomotives, Rail Cars, Railroad Equipment, Passenger Cars, and MOW.
What to put between flagstone joints ...(Yes, I am available to travel–if a project is financially, or artistically interesting to me, I'll go wherever) What to put between flagstone joints–polymeric sand or stone dust?
