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Gerard DeRoy Junior Member Registered: January 2004 Location: Montreal Posts: 52	2 layers of vectra/epoxy have been applied. With the Lindsay Lord concept it is important to do this in continous layer while there are no partition.
	· Date: November-5-2006 · Views: 1156 · Filesize: 32.5kb, 47.3kb ·
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Willallison
Senior Member

Registered: October 2001
Location: Australia
Posts: 2,415

November-6-2006 11:47pm

An interesting hullform. Can you explain your reasoning behind the way the 'keel' is higher than the turn of the bilge?

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Will
Imaginocean Yacht Design

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Gerard DeRoy
Junior Member

Registered: January 2004
Location: Montreal
Posts: 52

November-7-2006 9:29am

Hi Will,

Was wondering if anybody would notice it. Reasonning: Advantages: Form stability(low water ballast far outside) , lower draught. Potential disadvantage:Water flow separation(going from one hull to two). There is a flat bottom keel (20 feet long,

3 feet wide going from 6 to 28 inches height in the back) which will separate the flow anyway. Experimental motorsailor. very light, water ballasted + lead sheeting under the flat keel , junk rig, leeboards, L/B = 4.5. Design has not been exposed to professional designer yet, which I am not.

Thanks for the interest,

Gerard

Willallison
Senior Member

Registered: October 2001
Location: Australia
Posts: 2,415

November-8-2006 8:52pm

ok - but why not just have a flat bottom? I guess the curved surface is going to be a little stronger, but I don't recall seeing anything in Elements of Boat strength about the Lord process not being strong enough to incorporate flat panels

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Will
Imaginocean Yacht Design

Gerard DeRoy
Junior Member

Registered: January 2004
Location: Montreal
Posts: 52

November-9-2006 11:34am

Flat bottom? Agree that Lord process would be strong enough and this had no influence on my choice. I thought I was losing around 4 inches on draught and also on vertical position of water ballast. For construction : It is my first boat construction and I felt ill at ease with the required joints of a hard bilge design. For the design I felt that a hard bilge would be more difficult because of these developpable surfaces requirement. Stability at anchor? I have not done study on the subject but hope that those shoulders( on a light boat) will help to stop the rolling a bit.

Gerard

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