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Re: Flag Drag

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On 9/11/06, Rhkratzse(--nospam--at)aol.com <Rhkratzse(--nospam--at)aol.com> wrote:
In a message dated 9/11/06 11:57:45 AM, nma(--nospam--at)omsoft.com writes:
Use ANSI/NAAMM FP 1001-97. 
Equation 4 will give you the wind load for nylon or cotton flags.
Equation 5 will give you the wind load for polyester flags.

Just out of curiosity, how much variation is there?  I wouldn't have thought the flag material would make much difference, but apparently it does.

Ralph

Ralph-

looks like polyester gives a 40& increase over cotton/nylon

Nylon: Drag(pounds) = 0.001 x (V,mph)^2 x Sqrt(Area, sq. ft)

Polyester: Drag(pounds) = 0.0014 x (V,mph)^2 x Sqrt(Area, sq. ft)

cheers
Bob