Subject: [harryproa] Re: Still got some problems
From: "Robert" <>
Date: 11/22/2006, 10:00 PM

-My 2c worth. Considering how well you went with the windsurfer
masts, I don't see that it is a problem with the ww hull drag
especially now you have extra drag in the lw hull due to extra
weight. Seems to me, most probably cause is oversheeting in light
airs and possibly under rotation of the masts stuffing up the
lift/drag ratio of the rig. Can't see an Aero rig helping that much
except it brings the centre of effort forwards. Bringing your weight
forward can bring the centre of resistance forward but how much I
don't know.
-- In, "doha720" <doha720@...> wrote:
> Rob,
> Problems still with my boat.
> Speed is obviously very good. Cutting through water and waves very
> nice obviously narrow hull beams.
> I'm getting into trouble, the boat wants to turn up in to the wind,
> I think it is the drag from WW hull.
> So when the wind drops a bit, the rudder won't turn the boat back
> away from the wind, and so you have accelerating problem so that
> lose you're blown round and the wind is coming from the wrong side,
> and I gave up today just took sails down went home. It probably
> doesn't help that the booms aren't higher than the rudder tops, so
> allowing complete rotation of masts.
> Basically unless sailing at speed I'm unable to keep it pointed
> anywhere except drifting sideways which is common to boats with no
> wind I suppose.
> The place here at Mandurah is very tricky with a narrow channel,
> bridges and adverse tides, not to mention usually (Southerly)
> adverse winds too (blows you into the low bridge).
> Any help anyone?
> Outboard defeats the my purpose in the first place but seems to get
> you out of the tricky harbour, mooring, channels, then you need to
> get moving after which time you can keep a steady course as long as
> there is enough wind.
> This scenario unfortunately suits a big cruiser with and engine
> rather than the small sail boat which is for weaving around in
> amongst the shallows.
> Doug

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