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Reply | Forward Message #3264 of 6642 |
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Yes that is the one nice work. Do you see any concerns with the step
out there being effected by waves and possibly effecting boats
motion in the right/wrong kind of seaway?

Todd

--- In harryproa@..., "jjtctaylor" <jtaylor412@...>
wrote:
>
> If you mean the extended Harryproa, no not built yet. Extended
> slightly more to 46 ft and 25ft beam, in order to satisfy desires
> by "partner" (elsewise known as the boss)to change to galley up.
Rob's
> engineering support firm, Netamax is contracted by me to finish
the
> plans, then start building right away.
>
> But can't build too fast,.... covered hunderds of miles along the
> Carolina coast to find a marina. Severe shortage of slips wide
enough
> for cats. Only (1) available and cost as much or more than the
boat.
> Have to wait for new marina to be built for affordable dockage.
All
> the harbor/dockmasters agree on the problem, demand is just
starting to
> grow. Coastal politics are also playing havoc with marina
expansions so
> expect in the near future to remain an issue for the US coastal
areas.
>
> I have alternative layouts if interested. With slips so tight
> preferred not to push over 50 feet, difficult enought to find
slips
> with enough beam. Doesn't seem to be a problem for transients as
end
> dock space is usually available but many without services on the
end
> of "T" docks. So overnights are OK, just be self sufficient.
>
> Formal plans set won't be ready for another 6 mo or so.
>
> JT
>
> --- In harryproa@..., "tsstproa" <bitme1234@> wrote:
> >
> > I just rejoined your news group and seen a step hull rendering
> > recently posted in files section. Was it ever built? The step
looks a
> > little high but I guess with that shallow angle to hull it would
have
> > to be high. Nice rendering though. I like the step idea to
windward.
> >
> > Todd
> >
>





Sun May 11, 2008 5:39 pm

tsstproa
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Message #3264 of 6642 |
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If you mean the extended Harryproa, no not built yet. Extended slightly more to 46 ft and 25ft beam, in order to satisfy desires by "partner" (elsewise known...
jjtctaylor
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May 11, 2008
3:29 am

Yes that is the one nice work. Do you see any concerns with the step out there being effected by waves and possibly effecting boats motion in the right/wrong...
tsstproa
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May 11, 2008
5:39 pm

Todd, Yes that is a concern although none have experience on what any of these boats will do in a problem seaway. The overhang does curve upward toward the...
jjtctaylor
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May 12, 2008
1:44 am

-There have been a few multihull designers who reckon that a bevel works better than a radius. It may be worth having a 5cm radius at the joins to make it...
Robert
cateran1949
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May 12, 2008
2:56 am

Seem to recall the bevel worked better than a radius because a) there was no hydrodynamic disadvantage, b) it provided more add'l interior volume with less...
rattus32
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May 12, 2008
4:24 am

-CHeck out the Kelsall website. He sets up a radius female mold with a bit of pvc pipe. It allows easy joining of panels, Robert ... there was no ... with less...
Robert
cateran1949
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May 12, 2008
9:35 am

... reducing spray over the WW ... suggestion on how much ... Nope no idea, I'm working on the small side. So my flare width is limited to material weight used...
tsstproa
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May 12, 2008
6:45 pm

Do you see a cuase for an extreme load point on beams due to the varied length hulls in certain wavelength patterens. Long hull causing WW hull to pentrate...
tsstproa
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May 12, 2008
9:03 pm

Can't see the problem of extreme load as the overhang from ww hull is so little. Significantly less racking than equivalent cat. About amount of flare: I would...
Robert
cateran1949
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May 13, 2008
5:25 am

... This reflects also my thinking. Simple facts of life: wife likes marina conveniences, marinas are full, with wife onboard I have more chances to go sailing...
Arto Hakkarainen
ahakkara
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May 13, 2008
8:33 am

Arto, One point the boss made clear, she wants to be up, not down. Part of the sail appeal is social, so wants galley in the middle, and up not down in the...
jjtctaylor
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May 13, 2008
6:40 pm

But that is the difference. In our boat I am the galley slave. I don't mind working in the galley regardless of location. And the layout I'm thinking icludes...
Arto Hakkarainen
ahakkara
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May 13, 2008
7:28 pm

-Very similar to my concepts. I feel it allows more room below for very little extra wind resistance, if any, and possibly it ends up with less spray. I don't...
Robert
cateran1949
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May 14, 2008
1:10 am

... Shuttleworth has analyzed this very much. Two articles I found first from Shuttleworth's website: http://www.john-shuttleworth.com/Dogstar50-article.html ...
Arto Hakkarainen
ahakkara
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May 14, 2008
10:10 am

A radius join built on the top edge of the bottom sheet above the bilges and a radius curve built onto the bottom of the upper section and a flat between the...
Robert
cateran1949
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May 14, 2008
12:00 pm

G'day, Need to be a little careful as quarter circle radius joins don't allow obtuse angle joins, only acute. regards, Rob...
Rob Denney
proaharry
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May 14, 2008
12:52 pm

You are quite right, but I wasn't going to restrict myself to quarter circle. Some good sheers can trim to an obtuse angle and trimming of the intermediate...
Robert
cateran1949
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May 14, 2008
2:05 pm

Rafael Francke at Cat2fold has a very interesting design for a folding catamaran that can reduce its beam while on the water. He created it along with Kurt...
Mike Crawford
jmichaelcraw...
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May 14, 2008
1:59 pm

... In ... [lot of text snipped from between] Mike, I am aware of cat2fold desing and actually thought it would be the best solution for a folding big proa. ...
Arto Hakkarainen
ahakkara
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May 15, 2008
5:21 am

G'day, Cat to fold is an interesting solution. To get 3560 degrees on the tillers, mount the rudders on the beams, although this may mess up the scissoring. ...
Rob Denney
proaharry
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May 15, 2008
5:31 am

-A simple sliding in telescoping beams is pretty simple.There is plenty of bury available. three metre wide ww hull and only narrowing by less than two metres,...
Robert
cateran1949
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May 15, 2008
7:51 am

I wanted to inquire again about opinions on the cat2fold system. In looking at the layout for my "demountable" layout, it would allow an extended beam of >...
gardnerpomper
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Aug 26, 2008
5:25 am

G'day, I have spent the last few days thinking about sliding beams and working out the best way to make them work. In the bigger boats they are definitely...
Rob Denney
proaharry
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Aug 27, 2008
1:32 pm

Rob, I was not inquiring about folding beams on the harriette, I was asking about moving the rudders away from the lee hull to midships or further. I am ...
Gardner Pomper
gardnerpomper
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Aug 27, 2008
1:55 pm

G'day, Sorry, forgot about the rudders. One bow of the little hull is folded up and glassed. A very simple operation resulting in fair curves, although the...
Rob Denney
proaharry
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Aug 27, 2008
2:06 pm

I really like any design feature that would make the boat faster, easier to set up or easier to sail. The folder sounds like it would be easier to set up...
captian_rapscallion
captian_raps...
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Aug 29, 2008
3:47 pm

Hello Rob,   With the scissors type folding system, would the Harryproa with free standing mast put more strain on hinge and sliding connection than with a...
George Kuck
chesapeake410
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Aug 27, 2008
2:43 pm

G'day, The beams on harrys are made from a box with solid carbon tow corners which take all the tension/compression loads induced by bending. If the tow is...
Rob Denney
proaharry
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Aug 27, 2008
2:55 pm

I was playing with the idea a while back and worked on the vertical component taken by I beams connected with a decent pin in the center, with the fore aft...
Robert
cateran1949
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Aug 28, 2008
9:17 am

I can see the problems of the sliding beams being high friction if there is any load on the beams. Reducing the load may be possible by unweighting with a...
Robert
cateran1949
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Aug 28, 2008
9:41 am
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