<VV> Fans

Seth Emerson sethracer at aol.com
Thu Nov 16 15:01:46 EST 2017

If you can tune the harmonics, get it to play "Corvair Baby"! <grin>

-----Original Message-----
From: Kenneth Schifftner via VirtualVairs <virtualvairs at corvair.org>
To: VirtualVairs <VirtualVairs at corvair.org>
Sent: Thu, Nov 16, 2017 11:50 am
Subject: Re: <VV> Fans

With industrial duty fans, the fan speed range is set by the fan wheel characteristics and the Fan Laws. Harmonics are to be avoided. A book called “Fan Engineering” explains these details. What is usually done is design adjustments are made to the fan width and diameter but the speed is selected to avoid the harmonics. Another factor is noise…more blades (usually) more noise. Radial bladed fans such as the later model fans are inherently inefficient (but easier to mold) so Kevin’s design looks like a way to improve the efficiency. Go for it!Once Kevin gets the fan running, these things will become apparent. If I were doing this, I’d keep the pulley diameters the same but tweak the wheel width and diameter to suit the desired performance. Might take a few iterations but the potential is there!Sure, a proper width “loose" belt usually works for most, but what’s the fun in that?Ken SchifftnerRMC, PPCC, SDCC, NJACE _______________________________________________This message was sent by the VirtualVairs mailing list, all copyrights are the propertyof the writer, please attribute properly. For help, mailto:vv-help at corvair.orgThis list sponsored by the Corvair Society of America, http://www.corvair.org/Post messages to: VirtualVairs at corvair.orgChange your options: http://www.vv.corvair.org/mailman/options/virtualvairsArchives: http://www.vv.corvair.org/archive.htm _______________________________________________

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