Kayak and Canoe Design Bulletin Board

Re: Block coefficient and prismatic coefficients

Posted By: Nick Schade
Date: Thursday, 23 September 1999, at 9:40 a.m.

In Response To: Block coefficient and prismatic coefficients (Kari Harris)

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.

> Ok.. your opening said that this would be the place to ask what block and
> prismatic coefficients are.. so i'm asking! I'm taking an introductory
> engineering class which deals with naval architecture... and they asked
> for these values, but we have no equation to work with! so.. do you know
> what the equation for these values are??? thank 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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