The company calls this a contra-rotating vertical turbine, or CRVT. Again, the heaviest parts and the ones requiring most maintenance are at the bottom, below the buoyant pontoon, right down near ...

We interviewed the core team at Norway's World Wide Wind to learn more about its floating, tilting, contra-rotating, double turbine design, which it says can unlock unprecedented scale, power and ...

Here’s an interesting footage filmed form inside a Russian Tu-95 Bear bomber like the ones that skirt northern Europe’s airspaces every now and then. Although it does not show anything special about ...

London-based manufacturerPoduhvat has developed a wind turbine which they claim can produce five times more energy than traditional wind turbines with the same rotor size. The contra-rotating Whetar ...

At the very crux of engineering is the desire to problem-solve, optimize, and squeeze out every bit of efficiency possible from the system being built. Aircraft design and aeronautical engineering ...

French startup company Price Induction is studying an engine with a two-stage contra-rotating fan as a way to reduce fuel burn on very light jets. The Taor 380-1 would have a thrust of 720 pounds and ...

New features for the industry-standard resistance and propulsion software, HydroComp's NavCad. Many contemporary marine vehicles are being outfitted with contra-rotating propellers (CRP), and naval ...

Serious engineering work on contra-rotating open rotors for aircraft propulsion dates back to the late 1940s, particularly as a means to enhance fuel efficiency and extend the endurance of long-range ...

MESSRS. ROTOL AIRSCREWS, LTD., have now completed the development, to the production stage, of a constant speed contra–rotating airscrew, the principle of which was mentioned in NATURE of May 17, 1941 ...