power is a function of the cube of RPM in thousands, accd to Bob Boucher (Astro Flight).<br><br>The equation is this: Power = (Pitch in inches)*(RPM in thousands)^3*(Diameter in inches)^4*k, where k is a variable constant usually ranging from about
1.0 to 1.2 (APC = 1.15 IIRC).<br><br><br><br><div><span class="gmail_quote">On 2/20/06, <b class="gmail_sendername">Nat Penton</b> <<a href="mailto:natpenton@centurytel.net">natpenton@centurytel.net</a>> wrote:</span>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><font face="Arial" size="2">As Matt mentioned, the only way to use the
spinner as an effective air mover is as a cetrifugal blower. This
would call for an open nose, and the need for properly shaped
vanes (as a third part ?).</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">As I recall, power consumption ( volume ? ) is a
function of the cube of the RPM. I need help here, its only been 60
years.
Nat</font></div>
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