533Re: [AtkinBoats] Re: Most Efficient Hull??
- Jan 18, 2005Thank you for your response, Manfred.
I have heard of, and seen reference to, "Maderform" hulls - but did not understand the concept. Now I think it would be useful to know more. I used the Google search engine and looked for "Maderform hulls" (no results, do I want maidenform bras?) and Paul Mader (lots of stuff about a Paul Mader who is heavily involved in agriculture in 3rd world areas).
Do you know of any websites that discuss/have information on Maderform hulls?
----- Original Message -----
Sent: Tuesday, January 18, 2005 1:25 PM
Subject: [AtkinBoats] Re: Most Efficient Hull??
indeed, I would like to do this. But this is not possible for me.
First, the costs to run a water tank test series are very high and
I`m retired now with no personal access.
Second, there have been tests with similiar hulls since more than 20
years by Dr. Paul Mader ( "Maderform" hulls ). And these hulls have
been developed year by year and are patented now (think, I´m up to
date). They deliver hydrodynamic lift in the after third part of the
hull, a very smooth water behind and nearly no whorls ( vortices )
leave the hull. I have a DVD of the last tests in Berlin which shows
a very smooth waterflow of the hull and a very stable course.
Meanwhile there are some ships with these Maderform hulls on the
BODENSEE and other waterways in Germany, which have proven their
superiority over coventional designs. But as with all new
developments there are a lot of established people who deny the
merits of Maderform hulls although all tests and computersimulations
(Navier-Stokes) have shown their superiority.
Having the Maderform hulls in mind and looking at the study plans of
SAND PIPER one can find "some" similiar aspects. One might be the
negative deadrise at the stern. But there is more and this has to be
tested. I´ll try to get the plans of SAND PIPER ( with the help of
DUCKWORKS as they accept my Master Card ), build a down sized version
and test it here on the Baltic. In my cellar I try to twist sheets of
aircraft birch ply for a small model to gain an underwater shape like
SAND PIPER, to gain the same clever waterflow. But I`m not shure to
succeed. Regards, Manfred
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