Sharrow's extraordinary looped propellers were already some 30% more efficient than traditional designs – and now the company has put two of them together into a coaxial, contra-rotating prop that ...

Subscribe to our newsletter for the latest sci-tech news updates. SINTEF has now designed and manufactured new measuring equipment for model testing of contra-rotating propellers. This could be good ...

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 ...

Marine propulsion research & development company, Contrapel Ltd has released details of its new propulsion system for boats – the system set to make future boats more economical, manoeuvrable, safer, ...

EPFL startup Flybotix has developed a dual propeller drone which offers a flight time which is twice as long as that of a standard quadcopter. Samir Bouabdallah has come up with an inventive ...