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 ...

The surreal Sharrow CX contrarotating propeller is radically more efficient, quieter, and maneuverable than regular propellers. This beautiful work of art is actually the biggest propeller ...

RC Test Fight. Testing 12 Ultra Efficient Electric Boat Propellers. Posted: April 4, 2025 | Last updated: July 12, 2025. More for You ...

The propellers of the world's ships and boats create a constant drone that disrupts ocean life.; New propeller designs based on loops could one day quiet that drone and be more fuel efficient ...

EcoNavis Solutions, a spin-off from the University of Strathclyde in Scotland has begun production of its patented Eco Boss ...

Boat propeller maker bets on Detroit with ... at $2,000 that is marketed as the “first major advancement in propeller technology since the 1830s,” boosting fuel efficiency and reducing ...

Scientists say they have created a methodology that could replace two diesel engines powering a ferry boat with pneumatic propellers. The two air motors replacing the diesel engines, according to ...

Its eight propellers spin at 750 rpm at full tilt with the tips achieving Mach 1.08; the main reason these propellers maintain efficiency is that they have four sets of two contra-rotating pairs.