Subject: [harryproa] Re: Rare Bird Sailing
From: "Todd" <>
Date: 8/10/2007, 2:49 PM

Hey Rob ,

I hear you on the holes in hull and keeping it as simple as
possible. The drag wouldn't bother me to much but just the thought
of having that lower brace getting bombarded in any wind over 15
knots or lumpy seas. I have been experimenting with rudders hung on
beams with models have a few funky design which led me to tring
manipulation of hull wave.

Heeling and sitting low. All in favor of load windage. But as you
said wind ward hull draws 12 '' and leeward hull looked to be riding
pretty low with the small amout of heel. I'm wonder was the boat
loaded or light for the short trip?

I Have seen those aluminum power cats with their no rocker and sheer
lov'em . Havn't seen the A class lately.

Whens the 60' live aboard for a family of 4 coming out with salon?

Keep the video coming.


--- In, "Rob Denney" <harryproa@...>
> On 8/10/07, Todd <bitme1234@...> wrote:
> >
> > Sure the reverse sheer is something to get used to. .8 pc is
> > great. Looks to me the bow gets depressed a few inches from the
> > towards the end of the video clip. I like the piercing ability.
> > looks low on the water over all. I counted 12 times on the video
> > the rear rudder brace stuffing in the waves before camera panned
> > away.
> >
> Obviously the rudder set up is draggier than if it was in the hull.
> However, the advantages of no holes in the hull, kicking up,
lifting up,
> seeing when weed is on it, outweigh the little bit of extra drag,
> cruising. Solitarry has the rudders on the beams. If this works
as well as
> it does on Elementarry, we will look at putting them on all the
> boats.
> I was referring to 5 to 7degrees of heeling or more and with the
> > leeward hull allready buried the boat seemed to be almost at its
> > limit. Pitching is not what i'm looking for . My opinion with
> > you can over power a hull with out great pitching right to the
> > then oops over you go.
> >
> I find there is a fair bit of time before flying a hull becomes a
> It is difficult to tell, but the windward hull looks to be showing
> 6"/150mm of antifouling, of which about 2"/50mm is boottop. That
hull draws
> 12"/300mm so there is a fair bot to go before it flies.
> > I'd like to see them with out exterior appendages and sit a
> > higher in the water at speed.
> >
> Me too on the appendages, wait till you see Solitarry! Sitting
higher just
> means more windage, assuming it is not burying the bow. Be
interesting to
> find out where the limits lie. Latest A class cats have bows
which come to
> a point at the waterline, when viewed from the side. Apparently
they are
> doing well.
> Rolling? No different to a similar size cat. Need to try it out
in some
> big beam seas, but no reason why it should be a problem.
> Regards,
> Rob

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