Online Book: Engines For Cruising Boats, Chapter 4 of 12

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.

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Meet the Author


Matt, Engineering Correspondent, is a Professional Engineer and true renaissance man, with a wide range of expertise including photography and all things boat design. He has a unique ability to make complex subjects easy to understand and he keeps an eye on the rest of us to make sure that we don’t make any technical mistakes. Working as M. B. Marsh Marine Design, Matt designs innovative powerboats of all shapes and sizes.

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