Why is wind directon expressed as "FROM"?

"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.

--
Alex -- Replace "nospam" with "mail" to reply by email. Checked infrequently.

"alexy" wrote in message
...

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.


Of course, I was just keeping the explanation as simple as possible for
Larry.