Speaking of power

[wgalligan]

Based on all other models... our pattern planes are by far the quitest airplanes in the air.  I have seen a few IMAC's that have the noise down some but they still get a good prop rip at speed.  The .15 to .60 size engines make an iratating high pitch whine.
 Why is it that the pattern planes are some of the quietest yet we are still pressed for lowering the db even more?

WG

  ----- Original Message ----- 
  From: Dean Pappas 
  To: discussion at nsrca.org 
  Sent: Thursday, May 29, 2003 3:55 PM
  Subject: RE: Speaking of power


  Thank You for making my point Tony ... actually I am even more concerned with the subjective in-the-air noise.
  I fly at a beautiful and genuinely noise-sensitive site (1/4 mile from the site of Washington's crossing the of the Deleware on the Jersey side).
  I don't even look at the meter anymore: my ears are tougher!
  Dean
    -----Original Message-----
    From: Tony Stillman [mailto:tony at radiosouthrc.com]
    Sent: Thursday, May 29, 2003 4:17 PM
    To: discussion at nsrca.org
    Subject: Re: Speaking of power


    Actually, it's 2 db OVER if your flying at the Team Selection Contest!  Yes, these high-power engines turn bigger props, so noise is a factor...

    Tony Stillman
    Radio South
    3702 N. Pace Blvd.
    Pensacola, FL 32505
    1-800-962-7802
    www.radiosouthrc.com
      ----- Original Message ----- 
      From: Bob Kane 
      To: discussion at nsrca.org 
      Sent: Thursday, May 29, 2003 12:09 PM
      Subject: Speaking of power


      Has anyone measured the sound levels of the larger two strokes turning the big props?  We measured a YS140DZ with ES pipe turning a 17X12 APC and came up with 96dB, right on the limit.   Just curious.


      Bob Kane
      getterflash at yahoo.com 


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