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Message-ID: <715CDCBDE6BB40C281121444267051EF@wills>
From: "Mike Wills" <rv-4mike@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3885023@logan.com>
Subject: Re: [FlyRotary] Re: where's the missing power?
Date: Thu, 15 Oct 2009 20:21:36 -0700
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Sorry for my absence on a topic I started. My nephew had a skateboarding =
accident last weekend and is in the hospital in a chemically induced =
coma until his brain swelling is under control. And I thought car =
powered airplanes were dangerous. Stay away from skateboards.

Tracy - My mixture monitor shows stoich at full throttle. I suspect an =
airflow issue rather than fuel.

Al - my vacuum gauge is located in the plenum directly behind the =
throttle plates.

Lynn - I agree that the TB inlet is horrible and needs a bell mouth. The =
inlet is also pretty obstructed by the cowl which isnt visible in the =
pics I sent. I think I'll make an attempt to clean this up some and see =
if it gets me anywhere. If not I'll live with it for a while.

Kelly - always tough to determine if the problem is an engine issue or =
if the load is simply too much for the engine to overcome. I'm going to =
experiment with the shallow dive several have suggested and see what =
happens.

Mike
  ----- Original Message -----=20
  From: Bill Bradburry=20
  To: Rotary motors in aircraft=20
  Sent: Tuesday, October 13, 2009 4:21 PM
  Subject: [FlyRotary] Re: where's the missing power?


  Since you have the vacuum gauge, this article will help you use it for =
troubleshooting.

  =20

   http://autospeed.com/cms/A_2393/article.html

  =20

  Bill B

  =20


-------------------------------------------------------------------------=
-----

  From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] =
On Behalf Of Al Gietzen
  Sent: Tuesday, October 13, 2009 7:22 PM
  To: Rotary motors in aircraft
  Subject: [FlyRotary] Re: where's the missing power?

  I dont have a regular manifold pressure gauge, just an industrial type =
vacuum gauge ( I really gotta get an MP gauge). Anyway, the vacuum gauge =
was indicating 4" of vacuum.

  =20

  Where are you measuring the 4" vacuum?  If it is near the ports it is =
no unusual; if it is out before the runners; something is wrong.

  =20

  Al

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<DIV><FONT face=3DArial size=3D2>Sorry for my absence on a topic&nbsp;I =
started. My=20
nephew had a skateboarding accident last weekend and is in the hospital =
in a=20
chemically induced coma until his brain swelling is under control. And I =
thought=20
car powered airplanes were dangerous. Stay away from =
skateboards.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Tracy - My mixture monitor shows stoich =
at full=20
throttle. I suspect an airflow issue rather than fuel.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Al - my vacuum gauge is located in the =
plenum=20
directly behind the throttle plates.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Lynn - I agree that the TB inlet is =
horrible and=20
needs a bell mouth. The inlet is also pretty obstructed by the cowl =
which isnt=20
visible in the pics I sent. I think I'll make an attempt to clean this =
up some=20
and see if it gets me anywhere. If not I'll live with it for a=20
while.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Kelly - always tough to determine if =
the problem is=20
an engine issue or if the load is simply too much for the engine to =
overcome.=20
I'm going to experiment with the shallow dive several have suggested and =
see=20
what happens.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Mike</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dbbradburry@bellsouth.net =
href=3D"mailto:bbradburry@bellsouth.net">Bill=20
  Bradburry</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dflyrotary@lancaironline.net=20
  href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, October 13, 2009 =
4:21=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [FlyRotary] Re: =
where's the=20
  missing power?</DIV>
  <DIV><BR></DIV>
  <DIV class=3DSection1>
  <DIV>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt">Since you have the vacuum gauge, this =
article will=20
  help you use it for troubleshooting.<o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt"><o:p>&nbsp;</o:p></SPAN></FONT></P>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt">&nbsp;<A=20
  =
href=3D"http://autospeed.com/cms/A_2393/article.html">http://autospeed.co=
m/cms/A_2393/article.html</A><o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt"><o:p>&nbsp;</o:p></SPAN></FONT></P>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt">Bill B<o:p></o:p></SPAN></FONT></P></DIV>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt"><o:p>&nbsp;</o:p></SPAN></FONT></P>
  <DIV class=3DMsoNormal style=3D"TEXT-ALIGN: center" =
align=3Dcenter><FONT=20
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  </SPAN></FONT></DIV>
  <P class=3DMsoNormal style=3D"MARGIN-BOTTOM: 12pt"><B><FONT =
face=3DTahoma=20
  size=3D2><SPAN=20
  style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">From:</SPAN></FONT></B><FONT=20
  face=3DTahoma size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">=20
  <st1:PersonName w:st=3D"on">Rotary motors in aircraft</st1:PersonName> =

  [mailto:flyrotary@lancaironline.net] <B><SPAN style=3D"FONT-WEIGHT: =
bold">On=20
  Behalf Of </SPAN></B>Al Gietzen<BR><B><SPAN=20
  style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, October 13, 2009 =
7:22=20
  PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> =
<st1:PersonName=20
  w:st=3D"on">Rotary motors in aircraft</st1:PersonName><BR><B><SPAN=20
  style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [FlyRotary] Re: =
where's the=20
  missing power?</SPAN></FONT><o:p></o:p></P>
  <DIV>
  <DIV bgcolor=3D"#ffffff">
  <DIV>
  <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I dont have a regular =
manifold=20
  pressure gauge, just an industrial type vacuum gauge ( I really gotta =
get an=20
  MP gauge). Anyway, the vacuum gauge was indicating 4" of=20
  vacuum.</SPAN></FONT><o:p></o:p></P></DIV>
  <DIV>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt">&nbsp;<o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoNormal><FONT face=3DVerdana color=3Dblue size=3D2><SPAN=20
  style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Where are =
you=20
  measuring the 4=94 vacuum?&nbsp; If it is near the ports it is no =
unusual; if it=20
  is out before the runners; something is =
wrong.</SPAN></FONT><o:p></o:p></P>
  <P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
  style=3D"FONT-SIZE: 12pt">&nbsp;<o:p></o:p></SPAN></FONT></P>
  <P class=3DMsoNormal><FONT face=3DVerdana color=3Dblue size=3D2><SPAN=20
  style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: =
Verdana">Al</SPAN></FONT><o:p></o:p></P></DIV></DIV></DIV></DIV></BLOCKQU=
OTE></BODY></HTML>

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