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 ...

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 ...

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 ...

Ground testing is imminent on the open-rotor engine portion of the European Union’s Clean Sky initiative, with Snecma and partners now putting the finishing touches to assembling the demonstrator. The ...

The Aviationist was among the outlets invited to attend a demonstration event of the X2 technology at the Sikorsky Development Flight Center. Here’s how it went. After the U.S. Army’s FARA program was ...

Midea Group has patented a counter-rotating motor for high-speed blenders. The motor includes a stator with outer and inner windings, an inverter for synchronous excitation, an inner rotor rotating in ...

THE ability of a helicopter to hover and land almost anywhere makes it an enormously useful machine. But helicopters have their limitations, particularly when it comes to flying fast. In a recent ...