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

This is an opinion column. A new propeller design will likely start popping up on boats in Alabama and across the nation in the next few months—provided that the manufacturer eventually gets the price ...

Your prop is as essential as the engine that drives it; neither moves without the other. Like the tyres on your car, the propeller on your boat converts precious power into forward motion – but do you ...