Sailing question regarding LWL - SailNet Community
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post #1 of 8 Old 12-31-2012 Thread Starter
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Sailing question regarding LWL

I am looking at an IP 27
The LWL is only a little over 24 feet.
But when it is sailing and heeled I imagine that there would be a longer length of boat in the water. Am I correct?

Chesapeake Bay area

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post #2 of 8 Old 12-31-2012
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Re: Sailing question regarding LWL

Typically boats with long overhangs ( ie lwl considerably less than loa) will "gain" waterline when heeled.

Ron

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post #3 of 8 Old 12-31-2012
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Re: Sailing question regarding LWL

Quote:
But when it is sailing and heeled I imagine that there would be a longer length of boat in the water.
On the leeward side yes, but an equal decrease on the windward side.
Doesn't change theoretical hull speed if that's what you are pondering.
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post #4 of 8 Old 01-01-2013 Thread Starter
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Re: Sailing question regarding LWL

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On the leeward side yes, but an equal decrease on the windward side.
Doesn't change theoretical hull speed if that's what you are pondering.
I didnt think about that regarding leeward and windward and yes....I was thinking about hull speed, thanks

Chesapeake Bay area

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post #5 of 8 Old 01-01-2013
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Re: Sailing question regarding LWL

Theoretical hull speed is just that, theoretical.

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post #6 of 8 Old 01-01-2013
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Re: Sailing question regarding LWL

The difference in hull speed for an extra 6" or so is so small, it's basically non-existent.
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post #7 of 8 Old 01-01-2013
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Re: Sailing question regarding LWL

Most of the writings of prominent yacht designers that I have read don't place much value on the supposed increase of sailing length gained by long overhangs.

I would think that if they did, they would still use them, particularly in boats aimed at light wind performance, because the wetted surface would be reduced at low Speed/Length ratios.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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post #8 of 8 Old 01-01-2013
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Re: Sailing question regarding LWL

My A35 is 35' oal and 24' wll. the wll changes dramatically as she heels. Displacement does not change but shape of the wetted area certainly changes and probably windward characteristics. These boats can develop too much weather helm and require careful and early reefing.

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