Thus for example if you have a 35-foot boat with a waterline length of 28 feet its hull speed works out to a little over 7 knots 134 x 28 709.

Trimaran hull speed calculator. HS lwl 134. H 134 L M H 11508 N H 1852 Where H Hull Speed in Knots M Hull Speed in MilesHr N Hull Speed in KilometersHr L Boats Waterline Length. 15 rows SPEED LENGTH RATIO HULL SPEED CALCULATOR.

Farriers trimaran main hulls are in the lower range of 68-75 because they carry the full displacement in the main hull. That gives you a k factor of 33 - the k factor replaces the usual 135 that you multiply times the square root of the waterline length to get the hull speed. What its used for Performance Larger LB indicates a slimmer hull.

Check the totals a couple of times as its easy with so many figures to add them in twicenote the corrections on this sheet - Do this for each equally-spaced station and then youll be ready to use these figures to calculate the hull volumethis time using Simpsons Rule. Calculating the maximum speed is actually very simple. You calculate the maximum hull speed HS by taking the length in feet lwl get the square root and multiplying it by 134.

Definition LB length divided by beam. You need to know that the waterline length of one hull divided by the beam of one hull is 12. Now is the time to get out your calculator.

25 rows Hull Speed Formula. This usually implies less wave-making resistance and thus more efficient high-speed performance but also suggests reduced load-carrying ability for a given. Three Cylinder 20 Hp Perkins Diesel which uses very little fuel.

First the side overhangs widen the beam of the vessel which minimizes the chances of the boat flipping over when hit by a large breaking wave from the side. There are 5 electric bilge pumps in Center Hull as well as one manual pump. The Maxi trimaran IDEC SPORT can reach an average speed of 2685 knots or 3071 MPH.