On a calm day, you could fly it. It would only work
if you attached the mooring pennant to the stern of
the boat. The bow would have to face downwind.

Blorgad wrote
My friend and I are having a disagreement regarding the behaviour of
sailboats on a mooring. We both have limited sailing experience, although
he
has a fair amount more than I. We were discussing running up a spinnaker
at
mooring in calm air, just to practice putting it up. We eventually
concluded that this wasn't practical, but the argument came in as to our
our
different conclusions as to why it would not be. I felt that there would
be
no point to put it up, as it would just get blown into the rigging and not
really tell us anything and possibly get torn. He was of the opinion that
somehow the spinnaker could push the boat to one side, fill and turn the
boat around. Initially he said it would go right upwind of the mooring,
then reduced his claim to say that it would turn around at the point where
it was attached to the line at the bow.

I am of the opinion that this is physically impossible and that under no
combination of sail at a mooring could the boat turn around so that the
aft
was upwind. I am of the opinion that you could get the boat to swing to
one
side or the other a bit by backing the jib, but you could still never turn
the boat around.

I would gratefully accept as many informed opinions as possible on this
from
a sailing or physics point of view.

Fair winds,
Miles

Hi Bart senior,

Please read the letter again. The question is not how do we fly a spinnaker
while moored, but rather is it at all possible for a bow-moored boat to be
be turned around by a spinnaker, or any other combination of sails for that
matter, so that the aft end travels upwind?


"Bart Senior" wrote in message
t...
On a calm day, you could fly it. It would only work
if you attached the mooring pennant to the stern of
the boat. The bow would have to face downwind.

Blorgad wrote
My friend and I are having a disagreement regarding the behaviour of
sailboats on a mooring. We both have limited sailing experience,
although
he
has a fair amount more than I. We were discussing running up a
spinnaker
at
mooring in calm air, just to practice putting it up. We eventually
concluded that this wasn't practical, but the argument came in as to our
our
different conclusions as to why it would not be. I felt that there
would
be
no point to put it up, as it would just get blown into the rigging and
not
really tell us anything and possibly get torn. He was of the opinion
that
somehow the spinnaker could push the boat to one side, fill and turn
the
boat around. Initially he said it would go right upwind of the mooring,
then reduced his claim to say that it would turn around at the point
where
it was attached to the line at the bow.

I am of the opinion that this is physically impossible and that under no
combination of sail at a mooring could the boat turn around so that the
aft
was upwind. I am of the opinion that you could get the boat to swing to
one
side or the other a bit by backing the jib, but you could still never
turn
the boat around.

I would gratefully accept as many informed opinions as possible on this
from
a sailing or physics point of view.

Fair winds,
Miles

Excuse me, but O find your whole question totally illogical. Why even
suppose that it could? There is no advantage to or purpose in doing what
you ask. And it oddly sounds like a Bobsprit question.

--
katysails
s/v Chanteuse
Kirie Elite 32
http://katysails.tripod.com

"Women and cats will do as they please, and men and dogs should relax
and get used to the idea." - Robert A. Heinlein



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Why don't you read my response again, you idiot.

Blorgad wrote

Hi Bart senior,

Please read the letter again. The question is not how do we fly a
spinnaker
while moored, but rather is it at all possible for a bow-moored boat to be
be turned around by a spinnaker, or any other combination of sails for
that
matter, so that the aft end travels upwind?


"Bart Senior" wrote

On a calm day, you could fly it. It would only work
if you attached the mooring pennant to the stern of
the boat. The bow would have to face downwind.

Blorgad wrote
My friend and I are having a disagreement regarding the behaviour of
sailboats on a mooring. We both have limited sailing experience,
although
he
has a fair amount more than I. We were discussing running up a
spinnaker
at
mooring in calm air, just to practice putting it up. We eventually
concluded that this wasn't practical, but the argument came in as to
our
our
different conclusions as to why it would not be. I felt that there
would
be
no point to put it up, as it would just get blown into the rigging and
not
really tell us anything and possibly get torn. He was of the opinion
that
somehow the spinnaker could push the boat to one side, fill and turn
the
boat around. Initially he said it would go right upwind of the
mooring,
then reduced his claim to say that it would turn around at the point
where
it was attached to the line at the bow.

I am of the opinion that this is physically impossible and that under
no
combination of sail at a mooring could the boat turn around so that
the
aft
was upwind. I am of the opinion that you could get the boat to swing
to
one
side or the other a bit by backing the jib, but you could still never
turn
the boat around.

I would gratefully accept as many informed opinions as possible on
this
from
a sailing or physics point of view.

Fair winds,
Miles

You know, the name calling really isn't called for. You state that flying a
spinnaker would only work if moored to the aft. I agree. However, do you
believe that it is at all possible for a bow-moored boat to be
be turned around by a spinnaker, or any other combination of sails for
that matter, so that the aft end travels upwind?


"Bart Senior" wrote in message
t...
Why don't you read my response again, you idiot.

Blorgad wrote

Hi Bart senior,

Please read the letter again. The question is not how do we fly a
spinnaker
while moored, but rather is it at all possible for a bow-moored boat to
be
be turned around by a spinnaker, or any other combination of sails for
that
matter, so that the aft end travels upwind?


"Bart Senior" wrote

On a calm day, you could fly it. It would only work
if you attached the mooring pennant to the stern of
the boat. The bow would have to face downwind.

Blorgad wrote
My friend and I are having a disagreement regarding the behaviour of
sailboats on a mooring. We both have limited sailing experience,
although
he
has a fair amount more than I. We were discussing running up a
spinnaker
at
mooring in calm air, just to practice putting it up. We eventually
concluded that this wasn't practical, but the argument came in as to
our
our
different conclusions as to why it would not be. I felt that there
would
be
no point to put it up, as it would just get blown into the rigging
and
not
really tell us anything and possibly get torn. He was of the
opinion
that
somehow the spinnaker could push the boat to one side, fill and
turn
the
boat around. Initially he said it would go right upwind of the
mooring,
then reduced his claim to say that it would turn around at the point
where
it was attached to the line at the bow.

I am of the opinion that this is physically impossible and that
under
no
combination of sail at a mooring could the boat turn around so that
the
aft
was upwind. I am of the opinion that you could get the boat to
swing
to
one
side or the other a bit by backing the jib, but you could still
never
turn
the boat around.

I would gratefully accept as many informed opinions as possible on
this
from
a sailing or physics point of view.

Fair winds,
Miles

"Blorgad" wrote in message
...
You know, the name calling really isn't called for. You state that flying
a
spinnaker would only work if moored to the aft. I agree.

I disagree.

In your initial post you mentioned calm air. In these conditions the boat
will influenced by the tide. It is quite possible that the boat would be
pointing directly downwind, or at almost any angle, depending on the
combinatination of wind and tide.

If the boat was lying with a little breeze just aft of the beam, then I see
no reason why you couldn't use the sails to "sail" the boat through the
tide.


However, do you
believe that it is at all possible for a bow-moored boat to be
be turned around by a spinnaker, or any other combination of sails for
that matter, so that the aft end travels upwind?

It would be easy, in the right conditions, to get the aft end to *point*
upwind.


Regards


Donal
--






"Bart Senior" wrote in message
t...
Why don't you read my response again, you idiot.

Blorgad wrote

Hi Bart senior,

Please read the letter again. The question is not how do we fly a
spinnaker
while moored, but rather is it at all possible for a bow-moored boat
to
be
be turned around by a spinnaker, or any other combination of sails for
that
matter, so that the aft end travels upwind?


"Bart Senior" wrote

On a calm day, you could fly it. It would only work
if you attached the mooring pennant to the stern of
the boat. The bow would have to face downwind.

Blorgad wrote
My friend and I are having a disagreement regarding the behaviour
of
sailboats on a mooring. We both have limited sailing experience,
although
he
has a fair amount more than I. We were discussing running up a
spinnaker
at
mooring in calm air, just to practice putting it up. We
eventually
concluded that this wasn't practical, but the argument came in as
to
our
our
different conclusions as to why it would not be. I felt that
there
would
be
no point to put it up, as it would just get blown into the rigging
and
not
really tell us anything and possibly get torn. He was of the
opinion
that
somehow the spinnaker could push the boat to one side, fill and
turn
the
boat around. Initially he said it would go right upwind of the
mooring,
then reduced his claim to say that it would turn around at the
point
where
it was attached to the line at the bow.

I am of the opinion that this is physically impossible and that
under
no
combination of sail at a mooring could the boat turn around so
that
the
aft
was upwind. I am of the opinion that you could get the boat to
swing
to
one
side or the other a bit by backing the jib, but you could still
never
turn
the boat around.

I would gratefully accept as many informed opinions as possible on
this
from
a sailing or physics point of view.

Fair winds,
Miles

Well, my question, however is, could the SAILS bring the aft to wind. Yes
if the aft was already to wind due to tide, you could put up the spinnaker.
However, when you got to the end of the line, would not the aft then be
swung around down wind, as the force is being applied to the boat aft of the
bow line?


"Donal" wrote in message
...

"Blorgad" wrote in message
...
You know, the name calling really isn't called for. You state that
flying
a
spinnaker would only work if moored to the aft. I agree.

I disagree.

In your initial post you mentioned calm air. In these conditions the boat
will influenced by the tide. It is quite possible that the boat would be
pointing directly downwind, or at almost any angle, depending on the
combinatination of wind and tide.

If the boat was lying with a little breeze just aft of the beam, then I
see
no reason why you couldn't use the sails to "sail" the boat through the
tide.


However, do you
believe that it is at all possible for a bow-moored boat to be
be turned around by a spinnaker, or any other combination of sails for
that matter, so that the aft end travels upwind?

It would be easy, in the right conditions, to get the aft end to *point*
upwind.


Regards


Donal
--






"Bart Senior" wrote in message
t...
Why don't you read my response again, you idiot.

Blorgad wrote

Hi Bart senior,

Please read the letter again. The question is not how do we fly a
spinnaker
while moored, but rather is it at all possible for a bow-moored boat
to
be
be turned around by a spinnaker, or any other combination of sails
for
that
matter, so that the aft end travels upwind?


"Bart Senior" wrote

On a calm day, you could fly it. It would only work
if you attached the mooring pennant to the stern of
the boat. The bow would have to face downwind.

Blorgad wrote
My friend and I are having a disagreement regarding the
behaviour
of
sailboats on a mooring. We both have limited sailing experience,
although
he
has a fair amount more than I. We were discussing running up a
spinnaker
at
mooring in calm air, just to practice putting it up. We
eventually
concluded that this wasn't practical, but the argument came in
as
to
our
our
different conclusions as to why it would not be. I felt that
there
would
be
no point to put it up, as it would just get blown into the
rigging
and
not
really tell us anything and possibly get torn. He was of the
opinion
that
somehow the spinnaker could push the boat to one side, fill and
turn
the
boat around. Initially he said it would go right upwind of the
mooring,
then reduced his claim to say that it would turn around at the
point
where
it was attached to the line at the bow.

I am of the opinion that this is physically impossible and that
under
no
combination of sail at a mooring could the boat turn around so
that
the
aft
was upwind. I am of the opinion that you could get the boat to
swing
to
one
side or the other a bit by backing the jib, but you could still
never
turn
the boat around.

I would gratefully accept as many informed opinions as possible
on
this
from
a sailing or physics point of view.

Fair winds,
Miles

"Blorgad" wrote in message
news
Well, my question, however is, could the SAILS bring the aft to wind. Yes
if the aft was already to wind due to tide, you could put up the
spinnaker.

If the boat was lying with the beam to the wind, then the sails could be
used to turn the boat.


However, when you got to the end of the line, would not the aft then be
swung around down wind, as the force is being applied to the boat aft of
the
bow line?

No,.... not if the tide was strong enough. A good sailor could balance the
forces. The boat could end up pointing into the tide, or the wind ... or
anywhere in between.


Regards

Donal
--