[Amps] Reducing blower CFM and noise

[RICHARD GEORGE]

I think you will find it will reduce the output to 1/4 of the orignal. I had a similar experience years ago trying to go in the reverse of what you are doing.





K6KWQ Dick "12 Volt radios are for wimps, real radios can kill you" Still can't make it go QRO with "More Power"
  ----- Original Message ----- 
  From: kenw2dtc 
  To: amps at contesting.com 
  Sent: Saturday, April 10, 2004 9:13 PM
  Subject: [Amps] Reducing blower CFM and noise


  Hi,
  I have a Dayton pressure blower that puts out 820 CFM with a 3450 RPM 1/3 HP
  motor.  If I substitute a 1725 RPM 1/4 HP motor will the CFM drop in half?
  Will the roaring sound drop accordingly also?  I hope there is a straight
  formula rather than working with fan diameter and number of blades etc?
  73,
  Ken W2DTC

  _______________________________________________
  Amps mailing list
  Amps at contesting.com
  http://lists.contesting.com/mailman/listinfo/amps