Rolls-Royce is developing a hybrid jet engine designed to reduce flight emissions by roughly 30%, a target that places the British manufacturer squarely in a high-stakes race among engine makers to ...

A Texas-based company has completed the inaugural flight test of a 3D-printed hybrid rocket engine system. The flight test, called GMLRS-class Firehawk Analog (GFA), demonstrated directional stability ...

A hybrid-electric jet engine may seem as absurd as a horse-drawn Zeppelin, but GE Aerospace is ground testing a new megawatt-class hybrid turbofan engine and its full powertrain that is powerful ...