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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The FAI rules has a good description of the noise test/procedure…<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>The maximum sound/noise level of the model
aircraft and its propulsion device, shall be 94 dB(A)<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>measured at 3m from the centre line of the
model aircraft with the model aircraft placed on the<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>ground over concrete, macadam, grass, or bare
earth at the flight line.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>The tolerance of the sound/noise level
measurement is the specified tolerance of the manufacturer<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>of the measuring instrument.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>With the propulsion device running at full
power, the measurement will be taken 90 degrees on the<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>right-hand side, with the nose of the model
aircraft pointing into the wind. The Class 1 SLM (Sound<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>Level Meter) microphone shall be placed on a
stand 30cm above the ground in line with the<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>propulsion device Other than the helper
restraining the model aircraft, and the sound steward, no<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>persons or sound/noise reflecting or sound
absorbing objects shall be nearer than 3m to the model<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>aircraft or the microphone. The sound/noise
measurement shall be made immediately prior to each<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>flight. The sound test area must be located
in a position that does not create a safety hazard to<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>officials and other competitors.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>The flight time will be interrupted while the
sound/noise test at the flying site is being made. The<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>competitor shall not be delayed more than 30
seconds for this sound test.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>In the event of a model aircraft failing the
sound/noise test, no indication of the result or the reading<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>shall be given to the competitor, or his
team, or the judges, and both the transmitter and the model<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>aircraft shall be impounded by the flight
line official immediately following the flight. No modification<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>or adjustment to the model aircraft shall be
permitted (other than refuelling or battery recharging).<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>The competitor and his equipment shall remain
under supervision of the flight line director. The<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>model aircraft shall be re-tested within 30
minutes by a second noise steward using a second<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>Sound Level Meter, and in the event that the
model aircraft fails the re-test, the score for the<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>preceding flight shall be zero. The score for
the flight may be tabulated but not made public until<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>the
result of the re-test is communicated to the tabulators.</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b>On Behalf Of </b>Joe
Lachowski<br>
<b>Sent:</b> Wednesday, May 20, 2009 4:59 AM<br>
<b>To:</b> NSRCA Discussion List<br>
<b>Subject:</b> Re: [NSRCA-discussion] db Rules<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>There
was once a setup diagram in the AMA Competition Regulations. Since it is now
web based, it appears it has been removed. At least I couldn't find it.<br>
<br>
The IMAC regulations do have a diagram regarding sound measurement for
their aircraft though.<br>
<br>
Derek, do we need to add this to our section of the regs, again?<br>
<o:p></o:p></span></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;
font-family:"Verdana","sans-serif"'>Date: Wed, 20 May 2009 06:28:05 -0500<br>
From: f3aflyer7@gmail.com<br>
To: nsrca-discussion@lists.nsrca.org<br>
Subject: [NSRCA-discussion] db Rules<br>
<br>
Our club has recently added more flying times for quiet flyers. But we need to
have our planes db'ed before we can fly in these new very early hours.
Where can I find a set of guidelines on how a plane should be properly db'ed ?<br>
<br>
Regards <br>
Mike<o:p></o:p></span></p>
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