Calculate the hull speed if the boats waterline length is 12 feet.

Pontoon boat hull speed calculator. Theoretical displacement hull speed is calculated by the formula. What the classic hull-speed formula assumes is that 134 is the maximum SL ratio that can ever be achieved due to the characteristics of waves we discussed before and thus always serves to limit a boats top speed. Boat 37 mph is not unreasonable.

For most pontoon boat captains the real goal is to hit the golden 22 mph 36 kph mark. C 150 190 210 Enter Desired maximum speed. To use our boat prop calculator you need four inputs.

As a very general rule the maximum speed of any displacement hull--commonly called its hull speed--is governed by a simple formula. If youre running a 150 Yamaha on a 3000 lb. Another relatively simple method to predict a planing hull speed for a known displacement in tons 1 ton 2240 pounds and the engines BHP brake horsepower uses the simple experimental graph shown to the left.

The Odyssey 18 rowboat has an overall length of 18 and a waterline length of 17-7. 22 rows Hull dry weight in pounds. When you are sailing this can make all the difference as the displacement is different for a pontoon than more traditional vessels.

Hull speed in knots equals 134 times the square root of the waterline length in feet HS 134 x LWL. 24 x 5 x 134 16 mph This suggests that a little more motor would get you to 16 mph. Starting with the boats LWL from the graph you determine the boats C-valueYou then calculate the predicted speed by using the formula.

Max Speed Length-at-Water-Line LWL x 5 x 134 For yours. OMC Boats use 170 - 175 or 180 if using SST prop. 455 The Recommended Maximum Power Calculation.