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<DIV><FONT face=Arial size=2>John,</FONT></DIV>
<DIV><FONT face=Arial size=2>I've been part of setting noise limit in 2
clubs. One because I was an officer and we put them in place just in time
because when the complaint came in the town saw that we were being
proactive. In the second, I got roped in because I had "experience".
I've got the same sound meter that they use at nats. First rule is to get
a great meter and spend the money. You don't want to make a rule that
limits a persons flying if, when you go to enforce it, the defensive pilot
points out the uncertainty of your equipment. McMaster Carr has a +- 1Db
meter, which is as good as you can get. Its self calibrating too, which is
important since it will probably be stored at your field in the cold and
hot.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Second: I 've measured tons of planes from close
and far, upwind and down and talked to observers. You must not succumb to
claims that you can measure from 25 feet (or more) and get reliable
results. Way too many variables. Measer from 10 feet at a consistent
location. use A weighting, slow response to average the
results.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Third: after doing this twice with different
observers 103dB limit (10 feet over hard surface) is reasonable. Thisis
where both clubs ended up. It is a lenient threshold that few planes will
exceed, but when they do you and everyone will know it. If the law still
complains you can lower it, but no one will say you are being too restrictive
with this. Even the loud boys will agree, but they'll probably violently
oppose the concept of a noise rule.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>--Lance</FONT></DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=johnferrell@earthlink.net
href="mailto:johnferrell@earthlink.net">John Ferrell</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, June 19, 2006 8:08 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Noise
rules</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>If someone out there has a set of noise rules for
a general purpose RC club? Especially a set that works. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I cannot expect the masses to conform to pattern
numbers, but I need something to start with. "Reasonable" does not seem to
mean the same thing to every one. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>John Ferrell W8CCW<BR>"My
Competition is not my enemy"<BR><A
href="http://DixieNC.US">http://DixieNC.US</A><BR></FONT></DIV>
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