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To: flyrotary@lancaironline.net
Subject: Re: [FlyRotary] Noise Measurements
Date: Thu, 29 Jul 2010 15:52:41 -0400
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Steve,

Typically the measurement for cars and motorcycles is at 50 feet away at=
 90 degrees to the directin of the exhaust flow. Any in-cabin measurements=
 wouldn't need orientation, just put the pick up about where your head is.
=20
Bill Jepson






-----Original Message-----
From: Steve Thomas <glasair2@me.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, Jul 29, 2010 9:31 am
Subject: [FlyRotary] Noise Measurements


I want to take some noise measurements today with a new muffler I just=20
nstalled.  What is a reasonable distance from the aircraft to be taking th=
ese=20
easurements?  Right next to the airplane seems to be somewhat unreasonable=
, and=20
istance makes a big difference. =20
Best Regards,
Steve Thomas
______________________________________________________



-
omepage:  http://www.flyrotary.com/
rchive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.=
html


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<font color=3D'black' size=3D'2' face=3D'arial'>
<div><FONT face=3D"Arial, Helvetica, sans-serif">Steve,</FONT></div>


<div>&nbsp;</div>


<div>Typically the measurement for cars and motorcycles is at 50 feet away=
 at 90 degrees to the directin of the exhaust flow. Any in-cabin measureme=
nts wouldn't need orientation, just put the pick up about where your head=
 is.</div>


<div>&nbsp;</div>


<div>Bill Jepson<br>
<br>
</div>


<div style=3D"CLEAR: both"></div>
<br>
<br>


<div style=3D"FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt"=
>-----Original Message-----<br>
From: Steve Thomas &lt;glasair2@me.com&gt;<br>
To: Rotary motors in aircraft &lt;flyrotary@lancaironline.net&gt;<br>
Sent: Thu, Jul 29, 2010 9:31 am<br>
Subject: [FlyRotary] Noise Measurements<br>
<br>


<div style=3D"BACKGROUND-COLOR: #fff; MARGIN: 0px; FONT-FAMILY: Tahoma, Ve=
rdana, Arial, Sans-Serif; COLOR: #000; FONT-SIZE: 12px" id=3DAOLMsgPart_0_=
b18caf58-c217-4ddc-81ba-1db56d260130><PRE style=3D"FONT-SIZE: 9pt"><TT>I=
 want to take some noise measurements today with a new muffler I just=20
installed.  What is a reasonable distance from the aircraft to be taking=
 these=20
measurements?  Right next to the airplane seems to be somewhat unreasonabl=
e, and=20
distance makes a big difference. =20

Best Regards,

Steve Thomas
_______________________________________________________






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