This consisted of two rings of short propeller-like blades mounted in ... plane called the AN-70 with four forward-facing contra-rotating propfans under its wing, although only two prototypes ...

dating back over a century in aircraft and over four decades in maritime vessels. Volvo Penta is credited with patenting the first nautical contra-rotating propeller application in 1982 with the ...

Interestingly, the plane uses contra-rotating propellers ... and potentially the fastest, exclusively propeller-driven ...

The D-Dalus vehicle uses four contra-rotating turbines for propulsion, each reaching 2,200 rpm. Each turbine blade has a variable angle of attack, which according to the designer allows the main ...

The two Allison T40 engines and the contra-rotating triple-blade propeller setups attached to each were taken from the experimental Lockheed XFV and Convair XFY Pogo tail-sitter aircraft.

The United States Army's (US Army) Future Attack Reconnaissance Aircraft (FARA ... Most striking of all is the double-helix, contra-rotating main rotor assembly, something that no American ...

A propeller, such as used on a piston-powered private airplane or a turboprop regional airliner, spins its blades to generate thrust. The original aircraft ... fuselage to the rotating machinery.

The 19-m (62-ft), 30-kW, contra-rotating vertical-axis turbine is a prototype of a design that could scale to unprecedented size and power. Most wind turbines look like a propeller on a stick ...

The the new CX propeller, now available for pre-order, has two sets of blades that go in opposite directions. Other contra-rotating propellers both for marine and aeronautics applications exist ...