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

If a worn propeller requires repair, the CO2 footprint will be a full 40 percent lower if the job is done in Norway than if ...

If you've ever visited a World War II museum and seen some of the dummy bombs on display, you may have noticed a distinct, unusual characteristic on some of them. Some of these bombs possessed tiny ...

Over the past few years, labels such as DJI have pushed drones into the mainstream. If you look closely, you'll notice that a majority of them have four propellers, while helicopters have fewer of ...

Research sponsored by NASA has indicated that there is a significant potential for fuel savings from advanced propellers designed for lower speed general aviation (G.A.) aircraft as well as the ...

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 ...