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## Re: [TowerTalk] Quick wind question

 To: Martin Sole Re: [TowerTalk] Quick wind question Jim Lux Sun, 18 Mar 2007 06:52:34 -0700
 ```At 06:47 AM 3/18/2007, Martin Sole wrote: >Jim, > >Thanks, nice and simple eh? :-) > >Reasonable = +/- 20% then a tad (metric or imperial tad, not important) > >Of course the answers now breed more questions. JUsta check list to >see if I'm doing this right. > >rho= Air Density in kg/m^3 >Cd= coefficient no units but I have determined that for a roughly >rectangular shape 2 is 'reasonable' Use 1 for a "flat plate" >Area=m^2 (cross section perpendicular to wind) >wind=kph^2 m/sec if you want to keep units consistent. >Wind drag = ? (units) kg/m^2 ? Newtons >Bending moment = force, units same as wind drag? Force times distance - Newton Meters >Add drag for pipe calculated at say half length, ok. > >Yield strength for the pipe is quoted as 250 Mega Pascals, multiply >by 145.04 to get in psi. Need to scrounge up the equation for bending of pipe. I'm looking for my little handbook, so I don't get it wrong. >Many Thanks > >Martin, HS0ZED _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
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