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DQOTD: What do chines do (performance wise)?


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#1 MidPack

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Posted 27 November 2012 - 04:13 PM

I am sure this has been discussed here before, so apologies.

I'm seeing more (esp race oriented) boats with very defined chines, some with several flatter sections/cut lines (or whatever the proper term is). Not so much from a construction standpoint, as I can imagine the benefits there - but what are the sailing performance advantages (and disadvantages) of chines in hull design?

I did try Google first, but most of the hits were to other forums, where consensus answers weren't common.

#2 SailRacer

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Posted 27 November 2012 - 05:03 PM

First thought in my head was 'induced form stability' therefore, better speed achievement ie' surfing at lower speeds.

You will get better answers..
Sail safe!

#3 us7070

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Posted 27 November 2012 - 05:14 PM

at speed, chines give a cleaner water release from the hull.

#4 DA-WOODY

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Posted 27 November 2012 - 05:16 PM

they save you money when doing a paint job as it helps to figure where the bottom paint stops

time = money

less money = less time

= Faster

less you take a rating hit for saving money

you're welcome

#5 corkob

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Posted 28 November 2012 - 08:59 AM

Do they not increase the waterlenght as the boat heels and afford form stability to help to allow the boat to maintain power as the wind increases?

#6 Presuming Ed

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Posted 28 November 2012 - 03:09 PM

A boat with a flat bottom and sharp turn of bilge to the topsides will have more form stability than one with a V shaped bottom and more gentle turn of bilge. The sharpest turn of bilge you can get is a corner. Has upsides in terms of clean water release. Has downsides in terms of drag when immersed, which can have unwanted effects - see the RP boats that had to be re-hulled.

#7 Drop Bear.

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Posted 28 November 2012 - 05:18 PM

Chines copy mac 26's according to another thread here.

That's what they bloody well do.

#8 R Booze

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Posted 29 November 2012 - 12:09 AM

An olde woody boat builder guy I knew years ago once told me that chined boats were for people who couldn't afford real carpenters.....

#9 DA-WOODY

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Posted 29 November 2012 - 12:55 AM

An olde woody boat builder guy I knew years ago once told me that chined boats were for people who couldn't afford real carpenters.....


Ummmmmmmm

Posted Image

#10 DA-WOODY

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Posted 29 November 2012 - 01:02 AM

Posted Image

#11 Left Hook

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Posted 29 November 2012 - 01:30 AM


An olde woody boat builder guy I knew years ago once told me that chined boats were for people who couldn't afford real carpenters.....


Ummmmmmmm

Posted Image


Evry now and then you say things that remind me why I didn't block you years ago. This is one of those times.

#12 corkob

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Posted 30 November 2012 - 12:17 AM

What is clean water release?

#13 Monster Mash

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Posted 30 November 2012 - 12:41 AM

I was told by the FT7.5 dealer that keeping the chimes out of the water made the boat go fast. :ph34r:




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