The Offshore Voyaging Reference Site

Propeller Efficiency

Antifouled prop - before and after 147 IMG_3950

In the next few chapters of this Online Book, we’ll be looking at high (and low) tech things we can do with a yacht’s drivetrain to make more efficient use of the engine and its fuel.

But before we delve into sophisticated and costly advanced powertrain options, let’s take a look at the efficiency of the propeller.

On most cruising boats, power or sail, our biggest and cheapest gains in powertrain efficiency will come from choosing the propeller size and speed correctly.