The propeller system is the earliest thrust generator designed for fully powered aircraft flight. Though they have evolved quite a bit since their first operation by the Wright brothers in 1903, ...
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 ...
When it comes to seaborne propulsion, one simple layout has largely dominated over all others. You pair some kind of engine ...