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Return-Receipt-To: "Bobby J. Hughes" <bhughes@qnsi.net>
Subject: RE: [FlyRotary] Re: Mystery Radio Noise
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Date: Tue, 6 Oct 2009 17:33:09 -0600
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Thread-Topic: [FlyRotary] Re: Mystery Radio Noise
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From: "Bobby J. Hughes" <bhughes@qnsi.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

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And I thought my noise was strange! Actually I think it happened on all
headings. First indication was on a almost due South heading. It's never
done this before and the only possible change is the exhaust.
=20
So that's why they call it Lightspeed.=20
=20
Bobby

________________________________

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of sboese
Sent: Tuesday, October 06, 2009 4:16 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Mystery Radio Noise



Bobby,

=20

Is it possible that you were on a westerly heading and only when you
pitched down, direct sunlight was passing through the prop onto the
headset mike?

=20

I imagine that you are thinking I've really gone over the edge now.

=20

I had a similar problem with my Lightspeed headset that was caused by
sunlight passing through the prop early in the morning when facing east.
It took a long time to figure out that placing my hand over the mike to
shield it from the light would stop the noise.  It took a longer time to
get up the courage to call Lightspeed and ask them about this.  They
simply said "send the headset in and we'll fix it."  I did that and
haven't had the problem since.

=20

Steve Boese

=20

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bobby J. Hughes
Sent: Tuesday, October 06, 2009 4:54 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Mystery Radio Noise

=20

Got the plane back together late Sunday just in time for a few laps
around the airport. Oil temps showed major improvements with the larger
inlets. Climbing at 100 mph to 3000 ft, 7200 rpm on take off, reduced to
6500 rpm at 500 ft agl.

Maintained 6500 rpm at 37" MP for several circuits. Oil temps went to
220F but started to come down when I leveled off. Water stay at 190F or
below. OAT was 88F . My new "test"  ducts do not seal as well as the
first set so hopefully I still have room for improvement.=20

=20

While level at 3000 ft \ ground speed showing 145 knots I pitched the
nose down and heard a startling noise in my headset. Almost like wires
shorting. Leveled off and noise stopped. Pitched up no change. Pitch
down the noise returned. I decided it could not be wiring and repeated
this several times. It also happened at slower speeds but I don't
remember at what speed it stopped. It doesn't happen on the ground at
full power run up. My guess is my new exhaust is somehow affecting the
comm antenna when in a nose down attitude. The exhaust ends about 1 ft
in front and 1 ft to the side of the antenna. Any ideas?

=20

Bobby J Hughes

RV-10 SC Renesis

=20


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<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D591542723-06102009>And I thought my noise was strange! Actually =
I think it=20
happened on all headings. First indication was on a almost due South =
heading.=20
It's never done this before and the only possible change is the=20
exhaust.</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D591542723-06102009></SPAN></FONT>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D591542723-06102009>So that's why they call it Lightspeed.=20
</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D591542723-06102009></SPAN></FONT>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D591542723-06102009>Bobby</SPAN></FONT></DIV><BR>
<DIV dir=3Dltr lang=3Den-us class=3DOutlookMessageHeader align=3Dleft>
<HR tabIndex=3D-1>
<FONT size=3D2 face=3DTahoma><B>From:</B> Rotary motors in aircraft=20
[mailto:flyrotary@lancaironline.net] <B>On Behalf Of =
</B>sboese<BR><B>Sent:</B>=20
Tuesday, October 06, 2009 4:16 PM<BR><B>To:</B> Rotary motors in=20
aircraft<BR><B>Subject:</B> [FlyRotary] Re: Mystery Radio=20
Noise<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: =
10pt">Bobby,</SPAN></FONT></P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: =
10pt"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">Is it =
possible that you=20
were on a westerly heading and only when you pitched down, direct =
sunlight was=20
passing through the prop onto the headset mike?</SPAN></FONT></P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: =
10pt"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">I imagine =
that you are=20
thinking I&#8217;ve really gone over the edge now.</SPAN></FONT></P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: =
10pt"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">I had a =
similar problem=20
with my Lightspeed headset that was caused by sunlight passing through =
the prop=20
early in the morning when facing east.&nbsp; It took a long time to =
figure out=20
that placing my hand over the mike to shield it from the light would =
stop the=20
noise.&nbsp; It took a longer time to get up the courage to call =
Lightspeed and=20
ask them about this.&nbsp; They simply said &#8220;send the headset in =
and we&#8217;ll fix=20
it.&#8221;&nbsp; I did that and haven&#8217;t had the problem =
since.</SPAN></FONT></P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: =
10pt"></SPAN></FONT>&nbsp;</P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">Steve=20
Boese</SPAN></FONT></P>
<P class=3DMsoNormal><FONT color=3Dnavy size=3D2 face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: =
10pt"></SPAN></FONT>&nbsp;</P>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D2 =
face=3DTahoma><SPAN=20
style=3D"FONT-FAMILY: Tahoma; FONT-SIZE: 10pt">-----Original=20
Message-----<BR><B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> =
Rotary=20
motors in aircraft [mailto:flyrotary@lancaironline.net] <B><SPAN=20
style=3D"FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Bobby J. =
Hughes<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, October 06, 2009 =
4:54=20
PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> Rotary motors =
in=20
aircraft<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> =
[FlyRotary]=20
Mystery Radio Noise</SPAN></FONT></P>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D3=20
face=3D"Times New Roman"><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P>
<DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D2 =
face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; FONT-SIZE: 10pt">Got the plane back =
together late=20
Sunday just in time for a few laps around the airport. Oil temps=20
showed&nbsp;major improvements with the larger inlets. Climbing at 100 =
mph to=20
3000 ft, 7200 rpm on take off, reduced to&nbsp;6500 rpm at 500 ft=20
agl.</SPAN></FONT></P></DIV>
<DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D2 =
face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; FONT-SIZE: 10pt">Maintained 6500 rpm at 37" =
MP for=20
several circuits. Oil temps went to 220F but started to come down when I =
leveled=20
off. Water stay at 190F or below. OAT was 88F . My new&nbsp;"test" =
&nbsp;ducts=20
do not seal as well as the first set so hopefully I still have room for=20
improvement. </SPAN></FONT></P></DIV>
<DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D3=20
face=3D"Times New Roman"><SPAN=20
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P></DIV>
<DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D2 =
face=3DArial><SPAN=20
style=3D"FONT-FAMILY: Arial; FONT-SIZE: 10pt">While level at 3000 ft \ =
ground=20
speed showing 145&nbsp;knots I pitched the&nbsp;nose down and heard=20
a&nbsp;startling noise in my headset. Almost like wires shorting. =
Leveled off=20
and noise stopped. Pitched up no change. Pitch down the noise returned. =
I=20
decided it could not be wiring and repeated this several times. It also =
happened=20
at slower speeds but I don't remember at what speed it stopped. It =
doesn't=20
happen on the ground at full power run up. My guess is my new exhaust is =
somehow=20
affecting the comm antenna when in a nose down attitude. The exhaust =
ends about=20
1 ft in front and 1 ft to the side of the antenna. Any=20
ideas?</SPAN></FONT></P></DIV>
<DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><FONT size=3D3=20
face=3D"Times New Roman"><SPAN=20
style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P></DIV>
<DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><STRONG><B><FONT =
size=3D2=20
face=3DArial><SPAN style=3D"FONT-FAMILY: Arial; FONT-SIZE: 10pt">Bobby J =

Hughes</SPAN></FONT></B></STRONG></P></DIV>
<P style=3D"MARGIN-LEFT: 0.5in" class=3DMsoNormal><STRONG><B><FONT =
size=3D2=20
face=3DArial><SPAN style=3D"FONT-FAMILY: Arial; FONT-SIZE: 10pt">RV-10 =
SC=20
Renesis</SPAN></FONT></B></STRONG></P>
<DIV>
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face=3D"Times New Roman"><SPAN=20
style=3D"FONT-SIZE: =
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