All true, still want to get out there and try it. harry, like any fast
multi is going to be a problem for any self steering. An electronic
auto pilot might handle the changes in apparent wind but I distrust
them and don't want to have to generate that much electricity. I read
somewhere about a system that used a towed impeller to produce
hydraulic pressure and hydraulic logic, excess power was fed into the
batteries, sounded promising, but it seems to have disappeared.
--- In harryproa@yahoogroups.com.au, Peter Raymond <pramsec@a...> wrote:
>
> G'day Oceanplodder,
>
> Slocum sailed from Thursday Island to Cocos Islands in seventeen
days and
> according to him was only at the helm for three hours in that period.
> But remember
> that "Spray" was a long keel boat , heavy, with good directional
> stability. It is also
> probable that Slocum had steady winds from one direction though he does
> not say
> much about that. The rig he had at that time was that of a yawl.
>
> Straight sailing was something that proa builders seemed keen to
achieve
> so it may
> be possible to achieve though its sensitivity to weight placement may
> result in a lot
> of restriction of movement on board.
>
> Perhaps some proa owners could try to sail dead straight for at least
> one hour and
> see how much movement was necessary to achieve that and how much
desired
> movement
> was prevented for the same reason.
>
> Regards,
> Peter Raymond
>
>
>
>
>
>
> oceanplodder2003 wrote:
>
> >-
> >
> >
> >
> >
> >I've also thought about this and I'm convinced it's possible, probably
> >easy with the schooner, lately I've been considering the una rig and
> >that should be possible too.
> > The schooner rig- Remember that Slocum got Spray to steer downwind by
> >over easing both sails, should be relatively easy to do something
similar.
> > With the una rig my thoughts are to adjust balance by having the
> >forward rudder used as a daggerboard and by raising or lowering it
> >balance should always be perfect, then adjusting to self steer
> >hopefully becomes possible.
> >Just read that, wasn't too clear, hope it was understandable.
> >
> >
> >
> >-- In harryproa@yahoogroups.com.au, "doha720" <doha720@y...> wrote:
> >
> >
> >>G'Day,
> >>
> >>Here's a question that no one would probably tried yet.
> >>
> >>Can you put a sail up so that it is pulling somewhere forward of the
> >>mast, tie the rudder straight forward, and hace the boat sail itself
> >>downwind overnight?
> >>
> >>On the Schooner rig this could be the forward mainsail sheeted out.
> >>
> >>Actually I was only thinking about the schooner rig and haven't
> >>thought about the single rig they have on the biger boats.
> >>
> >>This is to saingle hand across a stretch of water taking more than a
> >>day.
> >>
> >>Doug
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
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