Propellant

Perhaps you haven’t given this problem a lot of thought, but it is a problem nonetheless... most spray bottles can’t be used upside down, or even at much of angle once they’re half-empty. Not only that, but there’s always that last little bit of liquid in the bottom that gets wasted. That's because most of them have rigid-tubed sprayers that just have a single hole at the bottom, so they only suck up liquid from the bottom middle of the bottle. Well, British inventor Michael Pritchard has come up with something he calls the ANYWAY Spray, a tube that allows you to hold your spray bottles any way you darn well please, and keep spraying until they’re as dry as Keith Richards’ bourbon glass. Read More

It may be called the Red Planet, but that doesn’t mean you can’t use green technology to get there. Engineers at the University of Hertfordshire are developing a miniature dual fuel rocket, as a test model for technology that could one day result in a full-scale carbon negative rocket capable of a return flight to Mars. Their model’s motor will be powered by a mixture of carbon dioxide and aluminum, turning the CO2 into carbon in the process - this is the opposite of what is done by traditional rockets. Read More

Automobiles aren’t the only vehicles turning to more environmentally friendly fuel sources. As we reported recently, NASA are testing a new type of rocket propellant made of a mixture of water and “nanoscale aluminum” powder they claim could provide a cleaner way to launch rockets, power long-distance space missions and generate hydrogen for fuel cells. A number of readers wondered, not unreasonably, what qualifies a rocket fuel as eco-friendly. We now have a few more answers. Read More