I don't really see how steering is crucial when flying a hull. When
I think about when a hull flys and the points of sail that it would
most likely happen, steering could end in catastrophe. With proper
balance when hull flys the boat shouldn't change course so
drastically and just settle with a eased sheet. Just my thought
anyway.
I'm going to test the kick up rudders on windward hull rear down
front up and sweeping dagger board on middle of lee hull with model
just to see if its feasible.
Tell us what your windward steering is on your new drawing . Come
on share, Whats with the holding back:)
Todd
-- In harryproa@yahoogrou
>
> G'day,
>
> El is the test bed and it flies a hull. So may the big ones, and
if they do, steerage is critical. The ratios for weight to windward
vary, and you are right, it is not a major concern. They work very
well where they are, so at this stage I have not seen the need to
experiment with athwartships location.
>
> regards,
>
> Rob
> ----- Original Message -----
> From: Todd
> To: harryproa@yahoogrou
> Sent: Friday, April 13, 2007 1:03 PM
> Subject: [harryproa] Re: Rudders on lee hull only
>
>
>
>
> I was thinking your elementary was your test bed for the larger
> boats. Which I thought were not designed to fly windward hull.
What
> are your ratio's for weight to windward I must be
misunderstanding
> your concept.
>
> I was curious since the trimarans would normally load leeward
float
> along with main hull and have the main steering on the main hull
yes
> I know they do have smaller stearing blades on the floats. Since
> your bigger boats don't fly windward hulls and have a similar
load
> to what the tri has, curious to find out if it would have same
input
> characteristics having main steering appendages on a shorter
loaded
> windward hull.
>
> I'm finding out with the eql model that it is more weight
sensitive
> with weight placed on the windward hull than the leeward hull
> meaning if I place enough weight to the rear on windward hull it
> will fall off the wind bear away, but both hull and float are
the
> same length. I have to try with the board on the windward hull
minus
> weight.
>
> Todd
>
> --- In harryproa@yahoogrou
> >
> > G'day,
> >
> > No, for the following reasons;
> > 1 They would lift out of the water if the hull flew
> > 2) Their drag would increase weather helm. weather helm is not
a
> problem on harrys so this may not be a valid reason any more.
> > 3) I don't like all the weight in the windward hull, except
for
> racing. Racing implies lifting the ww hull, see 1.
> > 4) I have had enough trouble getting lee hull rudders to work
> without starting on new sets of rudder problems.
> >
> > Despite all the above, the rudders on my Elementarry are
getting
> closer to amidships and I drew a Little America's Cup proa with
> rudders and rig in the ww hull. Huge rm (lack of rm is a problem
> with these boats) but prone to windward capsize unless the crew
were
> very good.
> >
> > We are about to launch a 6m proa with a pretty radical
approach to
> windward hull steering. Keep an eye on the web page for pics and
> progress. If it works (pretty big if), it will change a lot of
> preconceptions about proa steering.
> >
> > regards,
> >
> > Rob
> >
> >
> > ----- Original Message -----
> > From: Todd
> > To: harryproa@yahoogrou
> > Sent: Friday, April 13, 2007 12:28 AM
> > Subject: [harryproa] Rudders on lee hull
> >
> >
> > Rob, Have you ever experimented with just the rudders on the
> windward
> > hull?
> >
> > Or dagger board in center on leeward hull and rudders on ends
of
> > windward hull?
> >
> > Or any other configuration ?
> >
> > Todd
> >
> >
> >
> >
> >
> >
> > ------------
> -----------
> >
> >
> > Internal Virus Database is out-of-date.
> > Checked by AVG Free Edition.
> > Version: 7.1.394 / Virus Database: 268.18.18/734 - Release
Date:
> 3/26/2007
> >
>
>
>
>
>
>
> ------------
-----------
>
>
> Internal Virus Database is out-of-date.
> Checked by AVG Free Edition.
> Version: 7.1.394 / Virus Database: 268.18.18/734 - Release Date:
3/26/2007
>
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe