And you should
know that you could have a wind speed of 0.1 knots and it will move the boat
if there is no current opposing it.

Excuse me but if you had winds of .1 kts or anything less than 1 kt your sails
were probably hanging limp.
S/V Express 30 "Ringmaster"
"Trains are a winter sport"

They were hanging limp alright. For quite a while. We would get an
immeasurable puff every now and then. I'm not too worried about convincing
you. I was there. You believing me or not changes nothing. What is, is what
is and what we did is what we did...
;-)
Winds were below 1 knot and we were making headway. I used the 0.1 knot just
as a number to post for my example. Oh, and the friction of the water
against the hull in nonexistant (zero), until the hull starts to move, then
you have friction. So as we moved along slowly the friction slowed us as it
always does with all boats. But, unless the water is moving against the
forward motion of the hull, or is frozen solid, it will not hold your boat
stationary. That was a good one! Fluid motionless water holding a sailboat
stationary.......

maybe you were in hard water ; )
Scout

"FamilySailor" wrote in message
...
They were hanging limp alright. For quite a while. We would get an
immeasurable puff every now and then. I'm not too worried about convincing
you. I was there. You believing me or not changes nothing. What is, is
what
is and what we did is what we did...
;-)
Winds were below 1 knot and we were making headway. I used the 0.1 knot
just
as a number to post for my example. Oh, and the friction of the water
against the hull in nonexistant (zero), until the hull starts to move,
then
you have friction. So as we moved along slowly the friction slowed us as
it
always does with all boats. But, unless the water is moving against the
forward motion of the hull, or is frozen solid, it will not hold your boat
stationary. That was a good one! Fluid motionless water holding a sailboat
stationary.......

"FamilySailor" wrote in message ...
They were hanging limp alright. For quite a while. We would get an
immeasurable puff every now and then. I'm not too worried about convincing
you. I was there. You believing me or not changes nothing. What is, is what
is and what we did is what we did...
;-)

I certainly don't doubt that you were ... I've been there myself.


Winds were below 1 knot and we were making headway.

I'm curious, how do you measure that? The various annemometers I have stop
turning at speeds that low. Even smoke rising from a cigarette is close to
vertical when you go much below a knot.

I used the 0.1 knot just
as a number to post for my example. Oh, and the friction of the water
against the hull in nonexistant (zero), until the hull starts to move, then
you have friction.
So as we moved along slowly the friction slowed us as it
always does with all boats. But, unless the water is moving against the
forward motion of the hull, or is frozen solid, it will not hold your boat
stationary. That was a good one! Fluid motionless water holding a sailboat
stationary.......



I'm sure there is some component of friction that is not dependent on speed,
though it may be quite small. Its a little hard to find data for this, since it
has no commerical value.

However, I did say "in a practical situation," so it becomes fairly hard to show
that there's any motion on a 3 ton boat when there's only a few grams of force
(unless its in space). There are other problems - such as holding anything
like a proper sail shape, and leeway can be atrocious at very low speed. And
the rudder is effectively useless. Actually, if the wind was truely that low,
any rocking of the boat, or rudder motion would generate greater forces than the
wind.

Winds were below 1 knot and we were making headway.

I'm curious, how do you measure that? The various annemometers I have
stop
turning at speeds that low. Even smoke rising from a cigarette is close
to
vertical when you go much below a knot.

Well, one could pee in the water and then watch the bubbles. I just watched
the water moving past the rudder and the sediment in the water moving from
the bow to the stern. How would you detect movement? We also had a GPS that
was leaving tracks. Another thing, we ended up at a different location, so I
believe that would indicate some movement was involved. You act like 1 knot
is almost stationary and smoke would go straight up, but think about it.
That is moving at a rate 5,280 in just one hour, or 1.47' per second. It is
easy to detect movement and using a GPS to measure distance and the amount
of time required to cover that distance. Anyway, I did not do all that, I
just made an observation and said the wind speed is about 1 knot or less, no
measuring device needed. Give me a break.

We also had a GPS that was leaving tracks.

That only means you were moving over the bottom. Not thru the water. You were
probably drifting with the current.
S/V Express 30 "Ringmaster"
"Trains are a winter sport"

"FamilySailor" wrote in message ...
Winds were below 1 knot and we were making headway.

I'm curious, how do you measure that? The various annemometers I have
stop
turning at speeds that low. Even smoke rising from a cigarette is close
to
vertical when you go much below a knot.

Well, one could pee in the water and then watch the bubbles. I just watched
the water moving past the rudder and the sediment in the water moving from
the bow to the stern. How would you detect movement? We also had a GPS that
was leaving tracks. Another thing, we ended up at a different location, so I
believe that would indicate some movement was involved.

I wasn't questioning whether you were moving, though I doubt very much you were
going at wind speed in a drifter. In fact, the only reason I commented at all
is that I've never heard anyone talk about a windspeed of a tenth of a knot, and
I thought that was a curious concept to explore.

You act like 1 knot
is almost stationary and smoke would go straight up, but think about it.
That is moving at a rate 5,280 in just one hour, or 1.47' per second.

I did the same calculation (though I used the correct value for one knot, which
is 1.69 feet/second) before posting, which is why I said "much less than a
knot." The smoke from a cigarette rises pretty quickly. so you actually have
less than a second's worth to observe. In reality, in very light air like this
the wind can be virtually zero in the cockpit, but a knot or two, or more,
aloft.

It is
easy to detect movement and using a GPS to measure distance and the amount
of time required to cover that distance. Anyway, I did not do all that, I
just made an observation and said the wind speed is about 1 knot or less, no
measuring device needed. Give me a break.

Never! No nit can go unpicked!!! ;-}

That only means you were moving over the bottom. Not thru the water. You
were
probably drifting with the current.
S/V Express 30 "Ringmaster"
"Trains are a winter sport"

We left top of the lake and landed at the south end. I said I watched
sticks, grass etc. moving along the side of the hull from bow to stern. EOD

OK the wind was very light and ranged from zero to about a knot more or
less. Even at 0.1 knot in one hour the air would travel 528'

"Jeff Morris" wrote in message
...
"FamilySailor" wrote in message
...
Winds were below 1 knot and we were making headway.

I'm curious, how do you measure that? The various annemometers I have
stop
turning at speeds that low. Even smoke rising from a cigarette is
close
to
vertical when you go much below a knot.

Well, one could pee in the water and then watch the bubbles. I just
watched
the water moving past the rudder and the sediment in the water moving
from
the bow to the stern. How would you detect movement? We also had a GPS
that
was leaving tracks. Another thing, we ended up at a different location,
so I
believe that would indicate some movement was involved.

I wasn't questioning whether you were moving, though I doubt very much you
were
going at wind speed in a drifter. In fact, the only reason I commented at
all
is that I've never heard anyone talk about a windspeed of a tenth of a
knot, and
I thought that was a curious concept to explore.

You act like 1 knot
is almost stationary and smoke would go straight up, but think about it.
That is moving at a rate 5,280 in just one hour, or 1.47' per second.

I did the same calculation (though I used the correct value for one knot,
which
is 1.69 feet/second) before posting, which is why I said "much less than a
knot." The smoke from a cigarette rises pretty quickly. so you actually
have
less than a second's worth to observe. In reality, in very light air like
this
the wind can be virtually zero in the cockpit, but a knot or two, or more,
aloft.

It is
easy to detect movement and using a GPS to measure distance and the
amount
of time required to cover that distance. Anyway, I did not do all that,
I
just made an observation and said the wind speed is about 1 knot or
less, no
measuring device needed. Give me a break.

Never! No nit can go unpicked!!! ;-}

"FamilySailor" wrote in message ...
OK the wind was very light and ranged from zero to about a knot more or
less. Even at 0.1 knot in one hour the air would travel 528'

No, its 607.61154856 feet. ;-}