DefenceTalkIt takes a lot of fuel to launch something into space. Sending NASA’s Space Shuttle into orbit required more than 3.5 million pounds of fuel, which is about 15 times heavier than a blue whale. But a new type of engine – called a rotating detonation engine – promises to make rockets not only more […]https://www.defencetalk.com/simple-fuel-efficient-rocket-engine-could-enable-cheaper-lighter-spacecraft-74108/