What are canted hulls? :: Catamaran Sailboats at TheBeachcats.com

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What are canted hulls?

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klozhald

Rank: Chief

Registered: Apr 19, 2011

Last visit: Nov 20, 2024

Posts: 1460
Posted: May 11, 2018 - 06:18 PM

catmanCanting aside, the fact is, you sail a boat with horrible beam/seat tolerances. Most older boat saddles are horrible. In fact, one of the best things you can do to stiffen a boat like yours is bed the beams.

Thank you for making my point. Bedding is important, and shimming up with washers etc. to cant the hulls creates pressure hot spots that the bedding was created to avoid, by spreading the load over a greater area.

Many of us here at thebeachcats have re-bedded our beams, aligned our hulls center to center and toe to toe, and are not sailing cats with horrible bedding.
Nor do we think of ourselves as smarter that the designers of these cats, though we do have materials available to us now that are far superior to what was.

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Sheet In!
Bob
_/)_____/)_/)____/)____/)_____/)/)__________/)__
Prindle 18-2 #244 "Wakizashi"
Prindle 16 #3690 "Pegasus" Sold (sigh)
AZ Multihull Fleet 42 member
(Way) Past Commodore of Prindle Fleet 14
Arizona, USA
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tamumpower1

Rank: Mate

Registered: Nov 19, 2015

Last visit: Oct 22, 2024

Posts: 398
Posted: May 11, 2018 - 06:21 PM

klozhald
tatumpower1Meh, the ideal angle of the windward hull just skimming the surface is based on reducing the wetting surface in the water, not based on the hydrodynamics of the leeward hull going through the water.

This is incorrect.
Look at the early Prindles for example. The 16 and 18 hulls have their decks at a significant angle because they were designed to be sailed with one hull out of the water. The factory- based Prindle Class Association published articles about this in the 1970's. The asymmetrical hulls provided the best lift to the windward mark when sailed in exactly this manner.

Here is a view of how far down the decks come inboard:
https://www.thebeachcats.…8b930dcc1ba2aca612cbca64

What is incorrect? What you just said even though its talking about non symmetrical hulls still supports what I just said....that boats should be sailed upwind with the windward hull skimming the surface and that canting the hulls to match this intended angle sets the leeward hull at a level angle for it's most efficient angle and allows the daggers/rudders/ flat sides of the hulls to be perpendicular and provide the maximum slip resistance. Reducing the wetted surface makes a much bigger difference than the few degrees of angle induced into the leeward hull.

If any manual states that the primary purpose of lifting the windward hull to be just skimming the surface is that it sets the leeward hull at its optimal angle...it's flat incorrect.

What I understood you just said is that you shouldnt further angle already canted hulls? lol

Edited by tamumpower1 on May 11, 2018 - 07:25 PM.
catman

Rank: Lubber

Registered: Nov 15, 2002

Last visit: Mar 03, 2020

Posts: 21
Posted: May 13, 2018 - 01:47 PM

tamumpower1
klozhald
tatumpower1Meh, the ideal angle of the windward hull just skimming the surface is based on reducing the wetting surface in the water, not based on the hydrodynamics of the leeward hull going through the water.

This is incorrect.
Look at the early Prindles for example. The 16 and 18 hulls have their decks at a significant angle because they were designed to be sailed with one hull out of the water. The factory- based Prindle Class Association published articles about this in the 1970's. The asymmetrical hulls provided the best lift to the windward mark when sailed in exactly this manner.

Here is a view of how far down the decks come inboard:
https://www.thebeachcats.…8b930dcc1ba2aca612cbca64

What is incorrect? What you just said even though its talking about non symmetrical hulls still supports what I just said....that boats should be sailed upwind with the windward hull skimming the surface and that canting the hulls to match this intended angle sets the leeward hull at a level angle for it's most efficient angle and allows the daggers/rudders/ flat sides of the hulls to be perpendicular and provide the maximum slip resistance. Reducing the wetted surface makes a much bigger difference than the few degrees of angle induced into the leeward hull.

If any manual states that the primary purpose of lifting the windward hull to be just skimming the surface is that it sets the leeward hull at its optimal angle...it's flat incorrect.

What I understood you just said is that you shouldnt further angle already canted hulls? lolEdited by tamumpower1 on May 11, 2018 - 07:25 PM.

Wasting your time with that one Matt.

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Have Fun,
Mike
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