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Pages: [1]
Author Topic: Flat bottom v curved bottom?
rjWalker
Beginner
Posts: 27
Post Flat bottom v curved bottom?
on: February 20, 2012, 11:26

Some designs use flat bottoms and planes at the bow and stern; some (like Theil's) use curved bottoms.

What are the likely effects of the two design choices?

I've read references to a slapping effect when the face of a wave matches the slope of the bow - would a curved bottom minimize this?

Any other differences (aside from ease of fabrication?)
See comparison from screenshots
Image
Victorvect-
or
Beginner
Posts: 11
Post Re: Flat bottom v curved bottom?
on: March 11, 2012, 21:21

Not much difference with either.
Any flat plane presented to ripples or waves will slap somewhat.
Comes back to the same caveat :
These are essentially sheltered (that word again lol) ,flat water boats.
A thick , heavy built bottom would improve the drumming , and noise somewhat.

If you look at your two images , the Thiel boat has the shallower angle at the water line , suggesting it could be even noisier at anchor than the top (Atkin) boat.

I truely believe that there would be little difference between the two hulls.

The best of the scows have v bottoms :
Image

But up goes the build cost , time frame , complexity etc.etc.
rjWalker
Beginner
Posts: 27
Post Re: Flat bottom v curved bottom?
on: March 14, 2012, 13:17

Thanks for the feedback
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