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John Allan
 
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Default Please help settle an argument

In article ,
says...

"John Allan" wrote in message
T...
In article 40e8c292$0$24766$5a62ac22@per-qv1-newsreader-
01.iinet.net.au, "d parker" says...


"Steve Daniels, Seek of Spam" wrote in message
...
On Sun, 4 Jul 2004 17:40:08 -0300, something compelled "Blorgad"
, to say:

I agree, but my question was, is it possible under any combination of
sail
for the boat to turn aft to wind while secured to a mooring.

If secured at the bow, no.


FWIW.... Ditto!


FWIW ..... Bzzzzzzzzzzzt

Of course it is: tide-rode, strong tide against wind: geez us East
Australian sailors forget about tide g.

John


Excellent point, however, would a raised spinnaker, based on where the boat
is held and where the force transfers to the boat, not provide assistance
against that effect and tend (given enough wind) to swing the aft end
leeward once more?


Yup.

In very light wind (say 2kt) and very strong tide (say 4kt), dead
opposite one another, as long as the boat was on a dead run, boat speed
would be less than tide speed and tide would keep the boat upwind of the
mooring, and the mooring would keep it heading more or less downwind.

If there's enough wind for boatspeed to exceed tide speed the boat will
sail up to the mooring, past the buoy, then the mooring will snub and
pull the bow around to windward (I.e. the force of the spinnaker, being
transmitted through the mast and quarter blocks will pull the boat
downwind, pivoting on the mooring) and the boat will end up pointing more
or less into the wind, with the spinnaker wrapped more or less around the
rigging.

John