Why is wind directon expressed as "FROM"?

On Thu, 5 Jan 2006 11:51:58 -0500, "JohnH"
wrote in ::

Why is that?

The convention is probably a result of the way a weather vane works;
the arrowhead points into the wind, so a compass rose placed under it
indicates the direction of the wind's origin.

The convention is probably a result of the way a weather vane works;

I'd say the opposite - the vane is designed that way because we're
interested in where the hot air came from.

One could easily design a vane that worked the other way.

Jose
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On Thu, 05 Jan 2006 17:49:51 GMT, Jose
wrote in ::

One could easily design a vane that worked the other way.

How would you do that?

Make the arrowhead really big and mount the thing by the tail.

Tie a piece of string on a stick and see which way it points.

On 5 Jan 2006 10:01:48 -0800, "Tony" wrote in
.com::

Make the arrowhead really big and mount the thing by the tail.

Tie a piece of string on a stick and see which way it points.

I know how to do it. I just wanted to see if Jose did.

I know how to do it. I just wanted to see if Jose did.

Yes, I know how to do it. Do you really want to hear the same thing out
of even more posters?

Jose
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"Larry Dighera" wrote in message
...

How would you do that?


The shape doesn't matter. All that's required is greater surface area on
the downwind side of the pivot point.

On Thu, 05 Jan 2006 22:44:35 GMT, "Steven P. McNicoll"
wrote in
. net::


"Larry Dighera" wrote in message
.. .

How would you do that?


The shape doesn't matter. All that's required is greater surface area on
the downwind side of the pivot point.


So the placement of the pivot point is immaterial?

"Larry Dighera" wrote in message
...

So the placement of the pivot point is immaterial?


Well, where the pivot point is placed would determine which side of the
pivot point had the greater surface area. It all depends on your point of
view. Put the pivot point through the feathers and the arrow will "fly"
backward.

"Steven P. McNicoll" wrote:


"Larry Dighera" wrote in message
.. .

So the placement of the pivot point is immaterial?


Well, where the pivot point is placed would determine which side of the
pivot point had the greater surface area. It all depends on your point of
view. Put the pivot point through the feathers and the arrow will "fly"
backward.

I think Larry got you on this one. It is not which side of the pivot
has the greatest area, but which side has the greatest "area-arm".
Think W&B. A weather vane consisting of an infinitely thin rod with a
20 sq inch arrow 1 inch from the pivot and a 3 sq inch tailfeater 10
inches from the pivot will point into the wind.

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