Online Book: Engines For Cruising Boats, Chapter 7 of 13

Controllable Pitch Propellers (CPPs)

CPP fitted to an Artnautica LRC 58

CPP fitted to an Artnautica LRC 58

Earlier in this Online Book, we discussed the fuel map gap, that annoying (and expensive) disconnect between an engine’s ideal operating regime and the torque curve of a fixed propeller.

What if we had a propeller whose pitch—and, therefore, torque demand—could be adjusted to the most efficient point for whatever operating conditions happen to exist at the moment?

This is the idea behind a controllable pitch propeller (CPP).

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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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