This section covers the formulae that do not fit in the other three sections.

• Analysis Pitch
• Conversions
• Power Required
• Bollard Thrust
• Propeller HP

Analysis Pitch is a very rarely used specification, but it is included here both for the sake of completeness and because it is the only true way to define a propellers effective pitch. It can only be measured in a tank experiment, but it tells the whole story.

Conversions, for those of you not using Imperial source data.

Power Required is a calculation of the power required to drive the hull based solely on the hull characteristics. It is useful as an alternative method to determine if the engine fitted to your hull is under or over specified.

Bollard Thrust is an estimation of the amount of strain on a rope if one end is made fast to your stern bitts and the other is made fast to an immovable shore based bollard, and you apply full ahead power.

Propeller HP is another exotic formula in that it is only useful for creating charts depicting engine / propeller power curves. It is included here like the Analysis Pitch Formula for completeness only.