Web8 dec. 2024 · Follow the steps below to calculate boat speed: Step 1: Enter the shaft horsepower value, P. Step 2: Insert the boat's displacement, D. Step 3: Choose the … WebSo choosing an engine that provides 30% power than is required to reach ‘hull speed’ will ensure that you reach the maximum speed possible, even in rough conditions. Hull speed is determined by the following formula: HS = 1.34 x √LWL. (Hull Speed = 1.34 x the square root of the length of the vessel at the waterline) So for example a 25 ...

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Web26 mrt. 2010 · As a very general rule the maximum speed of any displacement hull--commonly called its hull speed--is governed by a simple formula: hull speed in knots … WebFormula 28.0 <40: less stiff, less powerful >40: stiffer, more powerful Displacement / Length Ratio A measure of the weight of the boat relative to it's length at the waterline. The … green and blue car

How Far Can You Sail In One Day? - Improve Sailing

WebHull Speed Formula. Theoretical displacement hull speed is calculated by the formula: velocity in knots = 1.35 x the square root of the waterline length in feet. Example: The Odyssey 18 rowboat has an overall length of 18' and a waterline length of 17'-7". On the chart 17'-7" is about half way between 17 and 18 feet, so hull speed is 6.5 mph. Web24 apr. 2010 · Lots of info here. The question is not so simple as it seems. There are many ratios, specifcations, ratings, etc that are used to compare sailboats. If you want to know … WebThis is a handy rule whereby boat speed in knots (V) is compared to hull waterline length in feet (L) where V divided by the square root of L = the speed/length ratio or S/LR. By way of example a boat 30 feet on the waterline at 6 knots has a S/LR of: 6 / 5.48 = 1.095. flower petal reference