Doug,
Actually losing both rudders would be expected sometimes in a grounding. On grounding
first rudder will shear (or break) but momentum will carry the second rudder into shoal
area too.
After which you have no control and will have to pitch the anchor.
Now your problem is what to do being unable to lower either rudder.
Fortunately real unlikely to do permanent damage but will need a tow out to deeper water.
Wind not too bad then the dinghy could suffice.
Breaking rudders under normal side loads (plus safety factor) should not happen if
designed properly. Fore aft loads will just shear the retaining plates.
JT
--- In harryproa@yahoogrou
>
> Hi
>
> I'd like to reply to mike:
> losing one mast is not something you plan for.
> Neither is losing both rudders.
> I can't handle both sails (4 sets of sheet ropes), plus rudders (mine need to go up and
down in a shunt) very well. The question is is the extra handling hassle worth it if you
might gat better speed ?
>
> Doug
>
> --- On Sat, 31/5/08, tsstproa bitme1234@..
>
> From: tsstproa bitme1234@..
> Subject: [harryproa] Re: Current rudder design?
> To: harryproa@yahoogrou
> Date: Saturday, 31 May, 2008, 12:31 AM
>
>
>
>
>
>
>
>
> Sure,
>
> And two sticks carring two sails is more drag, vs one.
>
> More sail area won't due you any good if its in the wrong place.
> Or needing to use deep boards to compensate for extra sail area in
> wrong place to stay in control adding even more drag. Its a proa no.
>
> Going off shore most carry spare of everything that they can.
>
> Steer By sails alone on a proa that needs deep daggerboards (prove
> it) explain that.
>
> Weather cocking on a proa balanced right easily does that with a
> single sail.
>
> Each to his own i'd agree.
>
> But Doug said he thought his boards needed to be further out
> towards bows for better control.
>
> So I simply gave a alternative, a glimps of what I thought worked
> well. Why would some take offense to that. I share my ideas knowing
> nothings set in stone I know this. Its nice to get different
> perspectives on different problems and solutions.
>
> Todd
>
> --- In harryproa@yahoogrou ps.com.au, Mike Crawford jmichael@ .>
> wrote:
> >
> >
> > Two sets of everything is more complex. There's a lot to be
> said for
> > a single una rig that doesn't have to be messed with.
> >
> > With that said, a schooner rig will:
> >
> > - allow more sail area for the same righting moment
> >
> > - provide a backup in case one mast/sail fails
> >
> > - use shorter/lighter masts that are more easily stepped, and
> also
> > transported/ shipped
> >
> > - allow you to steer and sail the boat, even if both rudders are
> gone.
> >
> > - provide a great weathercocking setup using a reefed aft sail
> in a
> > big storm (assuming you're not using drogues yet).
> >
> > It's all a matter of what you want to do with the boat, how far
> out
> > you want to go, and how long you'll be there. One person's hassle
> is
> > another person's peace of mind.
> >
> > - Mike
> >
> >
> >
> > tsstproa wrote:
> > >
> > > Its just finding the correct geomtry to allow specific sail being
> > > used to feather through Aframe if back winded.
> > >
> > > I see where you would think having two sails would make it
> easier to
> > > set for any condition in deep water.
> > >
> > > But what could be easier than one line to reef sail and another
> to
> > > shift entire sail from fore to aft. Instead of worring about two
> > > sets of everything.
> > >
> > > Todd
> > >
> > > --- In harryproa@yahoogrou ps.com.au
> > > <mailto:harrypro
>
> > > wrote:
> > > >
> > > > If the sails were as easy to shunt and good in being caught
> aback,
> > > I
> > > > would be with you all the way. I intend to set up a system
> similar
> > > to
> > > > your A frame on my 5m outrigger proa using a windsurfer rig.
> It is
> > > > designed for paddling out to snorkeling and fishing spots, and
> it
> > > > would be nice to sail home when the wind gets up.
> > > >
> > > > When you are in deeper water with a schooner rig, you power
> up. You
> > > > are not feathering all the time
> > > > Robert--- In harryproa@yahoogrou ps.com.au
> > > <mailto:harrypro
<bitme1234@
> > > > wrote:
> > > > >
> > > > > I don't know less depth less likely to hit somthing. Sounds
> good
> > > for
> > > > > cruising or racing. Also smaller boards possibly working
> under
> > > less
> > > > > strain on structure.
> > > > >
> > > > > Also one sail less gear along with shorter board depths =
> less
> > > drag
> > > > > What a waste to have one sail feathering in the wake of
> another.
> > > > >
> > > > > Better balance faster foward speeds with least amount of
> forces
> > > all
> > > > > around.
> > > > >
> > > > > Todd
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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