"Ugly Tornado I.a" Mini Wind Turbine Driving Howard Ind. 1-19-4203

[itsandbits1]

i get.924 using exact metre measure, which is 39.4

sorry, didn't dvide the seconds. real answer is 2.311166666667 or 2.31 for short

formula dia * 3.14 / 39.4 x rpm / windspeed / seconds in minute = tsr

[itsandbits1]

i think u are way off with your rpm calculation of 750. my calc gives it a tsr of 138.67

diax3.14 /39.4x750/5=tsr

[xxlray]

The RPM of 750 is "measured" and the calculation for the tip speed ratio is as follows:

TSR = RPM * circumfence / (60 x windspeed)

circumfence = diameter * PI = 0.295m * 3.1425 = 0.927m

Thus TSR = 750 * 0.927 / (60 x 5) = 2.32

I cannot find where I am wrong with it.

[dalvarezbaez]

how many power does it reach?

[xxlray]

It produces about 40mW in a 9mph wind.