EcoRenovator - View Single Post

Xringer · 01-08-11, 10:37 AM

"and never have seen it spinning".. That sounds like it might have been installed in a bad location.

I found this..

How to Calculate Wind Loads From Wind Speeds | eHow.com

"Calculate the force exerted by the wind at your target speed by squaring the speed in miles per hour and multiplying the answer by .00256.

For a 30 mph wind the calculation would be

30 * 30 * .00256 = 2.304.

This is the amount of pressure, per square foot, a 30 mph wind exerts."

So, if we double the speed. 60 * 60 * .00256 = 9.216 per sq foot..

Instead of double the force (with x2 wind speed), we got almost 4 times the force..

One of the reasons you get much better MPG driving at 30 instead of 60..

01-08-11, 10:37 AM	#7
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	"and never have seen it spinning".. That sounds like it might have been installed in a bad location. I found this.. How to Calculate Wind Loads From Wind Speeds \| eHow.com "Calculate the force exerted by the wind at your target speed by squaring the speed in miles per hour and multiplying the answer by .00256. For a 30 mph wind the calculation would be 30 * 30 * .00256 = 2.304. This is the amount of pressure, per square foot, a 30 mph wind exerts." So, if we double the speed. 60 * 60 * .00256 = 9.216 per sq foot.. Instead of double the force (with x2 wind speed), we got almost 4 times the force.. One of the reasons you get much better MPG driving at 30 instead of 60..