Consider, if you will, the humble motorboat propeller. It is small - usually 3 to 20 pounds with a 9 1/2- to 16-inch diameter - and has a simple job. Its task is to keep its head underwater and turn, ...

This video follows the process of building a custom boat designed to test and compare propeller efficiency under real-world ...

Over three years ago, Suzuki broke new ground in outboards when it introduced its DF350A, which featured contra-rotating propellers seen previously in sterndrive applications. The dual-prop setup ...

WILLIAMSBURG, Va., April 19 (UPI) -- U.S. researchers say they've confirmed turbulence from boat propellers can kill large amounts of copepods, small crustaceans important in marine food chains. The ...

From big boats to small, most have one thing in common - propellers. Boats move through the water with a gasoline or diesel engine that turns a propeller under the water. With the exception of ...