By using two propellers that rotate in opposite directions, a ship can use less energy to move forward. New knowledge means ...

Tribest, a leading provider of wellness appliances designed to make healthy living easy, announces the launch of the Tribest Backspin™— the world’s first Contra-Rotating Impact Blender. Anaheim, ...

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 ...

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 ...

Precious Metal is a staple of the air racing community. The highly modified P-51's striking yellow and polished paint job and its contra-rotating propellers are features that make it stand out, but ...