Speaking of power

[Gray E Fowler]

Who's pressing for lower noise? 



Gray Fowler
Principal Chemical Engineer
Composites Engineering




"wgalligan" <wgalligan at cnbcom.net>
Sent by: discussion-request at nsrca.org
05/29/2003 04:10 PM
Please respond to discussion

 
        To:     <discussion at nsrca.org>
        cc: 
        Subject:        Re: Speaking of power


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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