Kayak and Canoe Design Bulletin Board

Re: Block coefficient and prismatic coefficients

Posted By: Hans Friedel
Date: Thursday, 23 September 1999, at 4:37 p.m.

In Response To: Re: Block coefficient and prismatic coefficients (Nick Schade)

> Block Coefficient: The displacement of the boat divided by the
> displacement of a rectangular block with the same waterline length and
> width and the same draft.

> Prismatic Coefficient: The displacement of the boat divided by the the
> displacement of a "prism" of the same sectional shape as the
> widest part of the boat and the same waterline length and width.

> The hardest part of these is figuring out the displacement of the boat by
> calculating the volume of water displaced as the boat floats. If you have
> cross sections for which you know the area, you can use Simpson's Rule or
> Trapazoidal integration to calculate the volume.

Another way is to make a area curve and calculate the area. It is rather easy if you have a cad program. And there are some free cad programs on the Net that will do the jobb for you

Messages In This Thread

Block coefficient and prismatic coefficients
Kari Harris -- Wednesday, 22 September 1999, at 9:31 p.m.

Re: Block coefficient and prismatic coefficients
Nick Schade -- Thursday, 23 September 1999, at 9:40 a.m.

Re: Block coefficient and prismatic coefficients
Hans Friedel -- Thursday, 23 September 1999, at 4:37 p.m.

Re: Block coefficient and prismatic coefficients
Ian Johnston -- Friday, 24 September 1999, at 3:19 a.m.

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