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To: Miss Marple
I'm beginning to REALLY get worried about my niece and nephew down in Wilmington.
721 posted on 09/14/2003 7:05:06 PM PDT by Howlin
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To: Howlin; All
I dragged out my 'Chapman's Piloting' book and did a little calculations.

Wind Pressure increases with the square of the velocity.

What that means is

16 kt = 1 lb/ sq. ft. wind pressure

25 kt = 2.1 lb/sq. ft
50 kt = 8.5 lb/sq. ft.
75 kt = 22.5 lb/sq. ft.
100 kt = 50 lb/sq.ft.
120 kt = 72 lb/sq.ft
155 kt = 120 lb/sq. ft

That is on a flat surface perpendicular to the wind.
10 - 15 knots of wind can make a huge difference in wind pressure.

746 posted on 09/14/2003 7:21:52 PM PDT by Vinnie
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