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Old 05-23-2004, 01:19 PM
DJPierrot DJPierrot is offline
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Hull building material and techniques.

Hello,
As I have already said in my previous message, (http://boatdesign.net/forums/showthread.php?t=3717) I am designing an expermiment to find a hull design with minimal TDF. In order to do this, I must have many hulls to investigate, each with different characteristics (same length and same weight, but different width, beam, rocker, longitudinal shape, depth, and cross-sectional shape) The problem is that I do not know how to make these hulls. I was wondering if anyone would have an idea about what materials to make these hulls with, or could give me suggestions about this experiment.
Thank you in advance,

Pierre Badin
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Old 05-23-2004, 10:06 PM
Not A Guest Not A Guest is offline
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Taylor and Gertler have a rather long equation that relates drag (power) to speed and the hull geometry.

If you are very clever, you may be able to use that equation to make some usable statments about the minimal TDF.

(I made some useable statements about hull shape based on power output at one time. They seemed to be reasonable.)
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Old 05-24-2004, 12:38 PM
DJPierrot DJPierrot is offline
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Yes, I know, but that's all the dilemna in the first forum. Now my problem is to actually MAKE these hulls that I am going to test for minimal TDF. So again, do you have an idea about the technique or the material to build these hulls?
Thank you

Pierre Badin
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  #4  
Old 06-25-2004, 08:32 AM
GHJ
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Why would you test different hulls for drag when people have been doing
it for last few thousands years, man?
Just pick what you want from thousands of designs created over
thousands of years.
You want viking ship, pick one, you want spanish galion, pick one.
You want Formula-1 boat, there is plenty of this junk too.
No need for any testing, man.
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