<br><font size=2 face="sans-serif">Chris</font>
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<br><font size=2 face="sans-serif">It is always good to check your plane for noise AND weight BEFORE you leave. If you do not pass you will be disqualified on the last day-thats when they check the planes. More people fail weight than noise. Your engine set up will most likely pass, but there are a few things you need to consider. </font>
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<br><font size=2 face="sans-serif">However you have it propped makes a big difference. The higher RPM you go above about 8000, the closer you will be to failing. Try not to exceed the low 8000's on the ground-if you already are change props. Multi blades are quieter. You will be at site 4 which is grass, and the noise check is done on grass. I think that checking on grass is a bigger benefit than the 2 dB they give to those checked on hard surface. My plane checks 95 db on hard surface and at Municie on grass it was 92.</font>
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<br><font size=2 face="sans-serif">Also make sure that nothing is loose or rattling on your plane. Vibrating chin cowls and canopies can add alot of noise.</font>
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<br><font size=2 face="sans-serif">Get access to a scale. If you are real close to 5Kg then you need to know exactly what you are flying (equipment) once you get to Muncie.</font>
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<br><font size=2 face="sans-serif">Make sure your plane is under 2 meters. This sounds like a no brainer, but few actually check this. and extra wing tips, or a little bit longer rudder can mess you up here.<br>
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<br><font size=2 face="sans-serif">They have the scale, the 2 meter check fixture, and the dB meter set up in advance so you can check your plane, but if you fail during the pre-check you will need to be able to modify the problem when you are up in Muncie, which could be difficult.<br>
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Gray Fowler<br>
Principal Chemical Engineer<br>
Composites Engineering</font>
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<td><font size=1 face="sans-serif"><b>"White, Chris" <chris@ssd.fsi.com></b></font>
<br><font size=1 face="sans-serif">Sent by: discussion-request@nsrca.org</font>
<p><font size=1 face="sans-serif">04/20/2004 07:44 AM</font>
<br><font size=1 face="sans-serif">Please respond to discussion</font>
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<br><font size=1 face="sans-serif"> To: <discussion@nsrca.org></font>
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<br><font size=1 face="sans-serif"> Subject: Nats newbie questions 2004 / Intermediate</font></table>
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<br><font size=2 color=blue face="Arial">Hi guys, sorry if I've missed it, but....</font>
<br><font size=2 color=blue face="Arial">Is there a spot on the AMA or NSRCA site that shows the newbie what they need to know about flying at the nats. I have registered & paid, hotel booked, have backup frequencies covered, and now have completed the judging seminar (Thanks Springfield guys and Charlie Rock:), but I realize the noise testing stuff, weighing and processing have to be done. The nats packet I received from AMA didn't have the detail I expected (ok I'm a worry-wart???) For Instance: Without access to a decibel meter, is there any way to be sure my aircraft will be compatible with the noise checks?</font>
<br><font size=2 color=blue face="Arial">(Webra 145, 2blade and 4 blade props, Greve pipe, wood airframe) </font>
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<br><font size=2 color=blue face="Arial">Anyway surely there is a spot online that will minimize tying up the discussion list....</font>
<br><font size=2 color=blue face="Arial">Thanks,</font>
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<br><font size=2 color=blue face="Arial">Chris White</font>
<br><font size=2 color=blue face="Arial">NSRCA 3601</font>
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