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 ...

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 ...

P.C. Brown, J.E. Turnberg Sr. Prop-Fan propulsion systems have progressed from concepts and models to large scale aircraft/propulsion system integration tests. During the Prop-Fan Test Assessment ...