This is a citation of an outside article. Gravyday is not responsible for its content. Original URL below. NASA’s Fuel-less Space Engine Has Been Tested Spaceflight is hard. Blasting heavy cargo, spacecraft, and maybe people to respectable speeds over interplanetary distances requires an amount of propellant too massive for current rockets to haul into the void. That is, unless you have an engine that can generate thrust without fuel.(more)
