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<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>
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<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></BODY></HTML>