RPM for a jenny of 5 ms

[steeolico]

According to you a jenny with blade with tsr 6 and diameter of 5 meters to how much rpm I should calculate the beginning of production for a system of 24 V. Io I thought about 100 or 110 rpms.  

According to you that you have more experience is all right?  

Thanks  

(Translation software)

[Flux]

yes 100 rpm would seem reasonable.

Flux

[antonio]

Hi, I'm a new reader from Italy.

This is my comment.

If TRS=6 and cut-in speed  v=3 m/s

then blade tip speed will be  V=TRS*3 = 18 m/s

Blades rounds are depending from radius R.

If D=5m then R=2,5m

V=18 m/s = 2*PI*R*RPS (RPS=rounds per second)

Inverting formula I find:

RPS= 18/(2 * 3.14 * 2,5) = 1,15 round/second

Finally:

RPM = RPS * 60 = 69 rpm

I think these calculations very correct.

Wath old readers think?

Antonio

[steeolico]

Thank

[steeolico]

Thank