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Pacific proasailor bagging Harryproas.   Message List  
Reply | Forward Message #4761 of 6655 |
Re: [harryproa] Re: Pacific proasailor bagging Harryproas.

Rob,

I am not clear on how the loads can be the same as on a monohull in
that there is an extra 2 to 3 feet of leverage working against the
harry rudders If they are not supported below the beam. Monohull
rudders are supported where they enter the hull, below the waterline.

If I am wrong about this I would be really interested in a better
description of how the rudders work. They are a continuing area of
concern for me.

Gardner

On 12/1/08, Rob Denney <harryproa@...> wrote:
>>
>> --- In harryproa@..., "Robert" <cateran1949@...> wrote:
>>>
>>> Proasailor has just been bagging Harryproas on the multihull forum.
>>> Usual bit about how having the wtw doesn't work and Harryproas haven't
>>> proved themselves crossing oceans. Nothing specific. It does become a
>>> bore. Still it gives an excuse to reply and highlight the advantages
>>> of a Harry
>>>
>
> G'day,
>
> Sure does, and you are doing an excellent job, thanks. Proasailor is
> Joe Oster, who was thrown off the proa group for abusive language.
> Should be amusing to see what he comes up with on the free for all
> Sailing Anarchy site if he is pushed hard enough.
>
> As for the rudders, the loads are no higher than they are on many
> monos, and just as easily, (or as difficultly) engineered and built to
> take those loads.
>
> Regards,
>
> Rob
>



Mon Dec 1, 2008 10:20 pm

gardnerpomper
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Message #4761 of 6655 |
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Proasailor has just been bagging Harryproas on the multihull forum. Usual bit about how having the wtw doesn't work and Harryproas haven't proved themselves...
Robert
cateran1949
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Dec 1, 2008
9:23 am

I am not going to scoff or pontificate on that forum for the HP merits but the rudders remain a risk in bad seas. Torque load using rudders for leeway and...
jjtctaylor
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Dec 1, 2008
9:10 pm

... G'day, Sure does, and you are doing an excellent job, thanks. Proasailor is Joe Oster, who was thrown off the proa group for abusive language. Should be...
Rob Denney
proaharry
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Dec 1, 2008
9:56 pm

Rob, I am not clear on how the loads can be the same as on a monohull in that there is an extra 2 to 3 feet of leverage working against the harry rudders If...
Gardner Pomper
gardnerpomper
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Dec 1, 2008
10:20 pm

G'day, I was not referring top a similar weight or size mono or it's rudder. Picture a monohull (or a multi) with a rudder the same depth below the lower...
Rob Denney
proaharry
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Dec 2, 2008
8:14 am

Hi ya, I'm not really weighing into any arguement here, but I managed to break the carbon shafted blade back when still on first versions of rudders. It was a...
Doug Haines
doha720
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Dec 2, 2008
2:06 pm

I am having my engineer do the FEA on the rudder shaft, pivots and such. Rob has more confidence than I do on carbon rudders/ shafts. Rob plans to profile the...
jjtctaylor
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Dec 2, 2008
8:30 pm

Generally I would hope that on grounding the rudders would pivot to allow them to kick up but obviously not always. I do recall a Hobie that busted a rudder...
Robert
cateran1949
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Dec 2, 2008
9:18 pm

Let me see, The rudders are resisting lateral forces ala dagger boards, while at he same time are handling steering. So if I need lateral control and...
jjtctaylor
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Dec 1, 2008
11:29 pm

I agree with Rob that it should be very easy to beef up everything and spread loads over larger areas should the need arise. What about a rather big trim tab...
heinrich_meurer
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Dec 2, 2008
9:59 am

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