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To: ApplegateRanch

umm

F=MA

The F in the equation is the wind pressure

the mass is the air volume per unit density, which is practicaly a constant

the A is the object it is hitting, such as a house

How does that change exponentially??


88 posted on 08/28/2011 6:22:43 PM PDT by RaceBannon (Ron Paul is to the Constitution what Fred Phelps is to the Bible.)
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To: RaceBannon
the A is the object it is hitting, such as a house

A in that formula is Acceleration.

92 posted on 08/28/2011 6:36:33 PM PDT by Errant
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To: RaceBannon; ApplegateRanch
">The Generic Formula

For using the actual sustained wind speed expected (were we to actually determine it) :

Force, F = A x P x Cd

A = The projected area of the item

P , Wind pressure (Psf), = .00256 x V^2  (V= wind speed in Mph)

Cd , Drag coefficient,  = 2.0 for flat plates. For a long cylinder (like most antenna tubes), Cd = 1.2.
Note the relationship between them is 1.2/2 = .6, not quite 2/3.

This is the force on a discreet constant section. I.E. A length of tubing or some other such member that is part of a structure. The Force per unit area would be found by setting the area to 1.

98 posted on 08/28/2011 6:46:24 PM PDT by Errant
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