BoatHowTo · vidéo

Ce que couvre cette vidéo

A catamaran owner asks whether setting a PYI MaxProp's reverse pitch higher than its forward pitch improves control when backing into a slip.0:36 Nigel Calder confirms the approach is sound.0:41 At low harbor-maneuvering RPM, the engine carries substantial excess power between the prop curve and the full-power curve; increasing reverse pitch converts that surplus into greater thrust without risk of overloading the engine, because no one runs wide-open throttle in reverse.0:54 Forward pitch is a different matter: raising it at full throttle prevents the engine from reaching rated RPM and overloads it.1:11 Calder notes two additional efficiency levers for forward operation — increasing pitch to improve fuel economy at typical cruising speeds, or, where hull clearance allows, fitting a larger-diameter propeller, which is inherently more efficient than a smaller one.1:29 The practical rule: extra reverse pitch is safe and useful for slip maneuvering; extra forward pitch requires care to avoid engine overload at wide-open throttle.

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