Boat Design Review

The type of hull determines what kind of propeller is required to move the boat through the water.

There are two basic hull types: displacement and planing. Displacement boats are comparatively slow. They are supported by the weight of the water they dis­place (static water pressure). They are generally designed with a somewhat pointed or rounded stern as well as a pointed or rounded bow. They ride low in the water like large ocean-going ships. The propellers on these boats run totally submerged and will generally be of lower pitch, when powered by an outboard or stern drive.

In determining boat performance, propellers are second in importance only to the power available from the engine itself. Without the propeller's thrust, nothing happens.

Your boat's propeller affects every phase of performance - handling, riding, comfort, speed, acceleration, engine life, fuel economy and safety.