[bolger] Re: late but relevant?
Despite what others might say about hull form etc., I think you're onto a
good idea. Is your Chebacco 25 lapstrake? I suspect that sheet ply or cold
molded would lend themselves better to the leeboards. But lapstrake looks
workable with minimal shelves. I'm willing to bet that PCB&F would give
their blessings and maybe even some advice. Good luck.
jeb, sticking his neck out on the Fundy shore
At 01:55 PM 2/10/2000 +1030, you wrote:
good idea. Is your Chebacco 25 lapstrake? I suspect that sheet ply or cold
molded would lend themselves better to the leeboards. But lapstrake looks
workable with minimal shelves. I'm willing to bet that PCB&F would give
their blessings and maybe even some advice. Good luck.
jeb, sticking his neck out on the Fundy shore
At 01:55 PM 2/10/2000 +1030, you wrote:
>
>
> After a childhood spent dealing and helping to deal with stuck and sticky
>centreboards I refuse to spend my adult years doing the same , consequently
>i am putting leeboards on my chebacco 25 ... reasons?
>1) easily removed and fixed.
>2) efficient thru total area of immersion.
>3) no centreboard trunk spoiling cabin space.
>4) no chance of a stuck board which could be very dangerous if caught in a
>lee shore.
>I wont go on ... i'm sure someone else would like to mention the "cons" of
>leeboards .... Simon.
>
>
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Simon,
Take it from a Martha Jane man, leeboards are great in nearly all
respects. One big drawback however is that, whereas centerboards work
on any hull, leeboards only work on certain hull shapes. Bolger's
Chebacco is not designed for leeboards, is it? Make sure the Chebacco
boat has the right hull shape.
But it seems like the world is divided in half between the CBs that
always work perfectly and those that constantly stick. Try once more
and maybe you'll get lucky. No, I hate CBs for just the reasons you
cite.
In one respect the leeboard is at a disadvantage. It is a free foil, so
in effect a leeboard makes your boat a multihull. It pierces the water
surface, hence turbulence, cavitation, etc., meaning loss of
efficiency. It's why multihulls aren't faster than they are. On the
other hand, a centerboard is fully immersed (unless you sail with me).
Now, a cruising cat man told me the way you calm the seas again & get
rid of your little mini-bow wave and wake, and restore full efficiency
to a leeboard is to present a leading edge raked aft, i e the top of
the board's leading edge aft the bottom, or at least aft where the
board breaks the water. I have never seen where Bolger discusses any of
this. And I have not done any tests on my Martha Jane.
Ed Haile
Take it from a Martha Jane man, leeboards are great in nearly all
respects. One big drawback however is that, whereas centerboards work
on any hull, leeboards only work on certain hull shapes. Bolger's
Chebacco is not designed for leeboards, is it? Make sure the Chebacco
boat has the right hull shape.
But it seems like the world is divided in half between the CBs that
always work perfectly and those that constantly stick. Try once more
and maybe you'll get lucky. No, I hate CBs for just the reasons you
cite.
In one respect the leeboard is at a disadvantage. It is a free foil, so
in effect a leeboard makes your boat a multihull. It pierces the water
surface, hence turbulence, cavitation, etc., meaning loss of
efficiency. It's why multihulls aren't faster than they are. On the
other hand, a centerboard is fully immersed (unless you sail with me).
Now, a cruising cat man told me the way you calm the seas again & get
rid of your little mini-bow wave and wake, and restore full efficiency
to a leeboard is to present a leading edge raked aft, i e the top of
the board's leading edge aft the bottom, or at least aft where the
board breaks the water. I have never seen where Bolger discusses any of
this. And I have not done any tests on my Martha Jane.
Ed Haile
> After a childhood spent dealing and helping to deal with stuck andsticky
> centreboards I refuse to spend my adult years doing the same ,consequently
> i am putting leeboards on my chebacco 25 ... reasons?
> 1) easily removed and fixed.
>
After a childhood spent dealing and helping to deal with stuck and sticky
centreboards I refuse to spend my adult years doing the same , consequently
i am putting leeboards on my chebacco 25 ... reasons?
1) easily removed and fixed.
2) efficient thru total area of immersion.
3) no centreboard trunk spoiling cabin space.
4) no chance of a stuck board which could be very dangerous if caught in a
lee shore.
I wont go on ... i'm sure someone else would like to mention the "cons" of
leeboards .... Simon.
centreboards I refuse to spend my adult years doing the same , consequently
i am putting leeboards on my chebacco 25 ... reasons?
1) easily removed and fixed.
2) efficient thru total area of immersion.
3) no centreboard trunk spoiling cabin space.
4) no chance of a stuck board which could be very dangerous if caught in a
lee shore.
I wont go on ... i'm sure someone else would like to mention the "cons" of
leeboards .... Simon.