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Re: Flag Drag[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: rkazanjy(--nospam--at)gmail.com, seaint(--nospam--at)seaint.org
- Subject: Re: Flag Drag
- From: Rhkratzse(--nospam--at)aol.com
- Date: Tue, 12 Sep 2006 00:10:20 EDT
That's very interesting. Thanks.
So supposedly the type of flag will never be changed. I don't do flags, so this is out of my field, but I just think about the situation if the wind forces were 40% different on a stucco (say) building than on a wood siding building, and what would happen if one were remodeled into the other sometime.
In a message dated 9/11/06 8:50:55 PM, rkazanjy(--nospam--at)gmail.com writes:
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.
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)
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