QUESTION: I’m going to buy a new twin-engine boat. What can you tell me about counter-rotation outboards? ANSWER: Counter-rotation outboards turn their propellers in opposite directions. The starboard ...

Late last year, Safran completed a ground-test campaign with a full-scale counter-rotating open rotor (CROR) engine on an impressive outdoor testbed, almost 10 years after the launch of the ...

Astron aerospace has shown a partial prototype of a new rotary combustion engine it claims runs at an extraordinary 60% thermal efficiency, burning totally clean with zero NOx emissions and nothing ...

GE Aviation and NASA will run a wind tunnel test program over the northern summer to evaluate and test counter-rotating fan-blade systems for open-rotor jet engine designs. The newly improved rig for ...

Dan Gurney, a famous racer from the 1970s, came back under the spotlight with a patent for a new type of engine. The legendary driver, who was known for his unusual height and the “bubbles” that the ...

Counter-rotating wind turbines (CRWTs) represent an innovative paradigm in wind energy conversion, employing a dual rotor mechanism in which two coaxial rotors spin in opposite directions. This ...

The Rotating Detonation Engine being developed by Pratt & Whitney has no moving parts, which reduces complexity and costs, and could help enable high-speed, long-range flight with increased efficiency ...