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Date: Wed, 20 Jun 2012 12:12:01 -0400
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From: PAUL HERSHORIN <paulhershorin@bellsouth.net>
Subject: Re: [LML] Re: Precision airmotive servo
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I had to have the fuel flow on my servo increased three times before I felt=
 safe on take off performance figures.
=A0
Paul Hershorin
lnc2 360

--- On Wed, 6/20/12, Sky2high@aol.com <Sky2high@aol.com> wrote:


From: Sky2high@aol.com <Sky2high@aol.com>
Subject: [LML] Re: Precision airmotive servo
To: lml@lancaironline.net
Date: Wednesday, June 20, 2012, 9:46 AM


Tom,
=A0
My IO 320 (CR 9:1) uses 15.2 gph at takeoff (WOT, 2750 RPM, 700 MSL) and th=
e leanest cyl=A0EGT is about 160 ROP.=A0 Base engine timing is 20 DBTDC (Du=
al Plasma III EI). Hot day climb out at 135 KIAS will see CHTs at 380-390F.=
=A0 I think=A0that the=A0flow is minimal but OK for me.
=A0
The only proper way to adjust max flow=A0thru the servo is to do it on the =
bench by a technician with special equipment.
=A0
Scott Krueger
=A0

In a message dated 6/20/2012 7:17:13 A.M. Central Daylight Time, n20087@yah=
oo.com writes:
Folks

I believe my fuel servo is not delivering sufficient fuel to the engine in =
the takeoff position. Why I say this is because the difference between the =
peak EGT and the takeoff EGT is 70 degrees F on the leanest cylinder and 12=
0 on the richest.=A0 The book says this spread should be anywhere between 1=
50 and 200 degrees F.=A0 Why do I care you may ask.. Well my CHTs are too h=
igh at full throttle takeoff.=A0 I have to work to keep them below 430.=A0 =
I have done everything possible to maximize cooling airflow with little imp=
rovement in the CHT situation.=A0=20

Anyhow, I would be interested in information from the group on the followin=
g=20

Like to compare fuel flows at full throttle at close to sea level (mine is =
between 15 and 16 gals/hr)
Any info concerning experience with enriching the takeoff flow on the bendi=
x style RSA-5AD1 servo (this setting is internal, I have found no reference=
 material on the procedure)

Thanks

Tom
--
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;"><DIV>I had to have the fuel flow on my servo =
increased three times before I felt safe on take off performance figures.</=
DIV>
<DIV>&nbsp;</DIV>
<DIV>Paul Hershorin</DIV>
<DIV>lnc2 360<BR><BR>--- On <B>Wed, 6/20/12, Sky2high@aol.com <I>&lt;Sky2hi=
gh@aol.com&gt;</I></B> wrote:<BR></DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5=
px; MARGIN-LEFT: 5px"><BR>From: Sky2high@aol.com &lt;Sky2high@aol.com&gt;<B=
R>Subject: [LML] Re: Precision airmotive servo<BR>To: lml@lancaironline.net=
<BR>Date: Wednesday, June 20, 2012, 9:46 AM<BR><BR>
<DIV id=3Dyiv157689757>
<DIV><FONT id=3Dyiv157689757role_document color=3D#000000 size=3D2 face=3DA=
rial>
<DIV>Tom,</DIV>
<DIV>&nbsp;</DIV>
<DIV>My IO 320 (CR 9:1) uses 15.2 gph at takeoff (WOT, 2750 RPM, 700 MSL) a=
nd the leanest cyl&nbsp;EGT is about 160 ROP.&nbsp; Base engine timing is 2=
0 DBTDC (Dual Plasma III EI). Hot day climb out at 135 KIAS will see CHTs a=
t 380-390F.&nbsp; I think&nbsp;that the&nbsp;flow is minimal but OK for me.=
</DIV>
<DIV>&nbsp;</DIV>
<DIV>The only proper way to adjust max flow&nbsp;thru the servo is to do it=
 on the bench by a technician with special equipment.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Scott Krueger</DIV>
<DIV>&nbsp;</DIV>
<DIV>
<DIV>In a message dated 6/20/2012 7:17:13 A.M. Central Daylight Time, n2008=
7@yahoo.com writes:</DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN=
-LEFT: 5px"><FONT style=3D"BACKGROUND-COLOR: transparent" color=3D#000000 s=
ize=3D2 face=3DArial>Folks<BR><BR>I believe my fuel servo is not delivering=
 sufficient fuel to the engine in the takeoff position. Why I say this is b=
ecause the difference between the peak EGT and the takeoff EGT is 70 degree=
s F on the leanest cylinder and 120 on the richest.&nbsp; The book says thi=
s spread should be anywhere between 150 and 200 degrees F.&nbsp; Why do I c=
are you may ask.. Well my CHTs are too high at full throttle takeoff.&nbsp;=
 I have to work to keep them below 430.&nbsp; I have done everything possib=
le to maximize cooling airflow with little improvement in the CHT situation=
.&nbsp; <BR><BR>Anyhow, I would be interested in information from the group=
 on the following <BR><BR>Like to compare fuel flows at full throttle at cl=
ose to sea level (mine is between 15 and 16 gals/hr)<BR>Any info concerning
 experience with enriching the takeoff flow on the bendix style RSA-5AD1 se=
rvo (this setting is internal, I have found no reference material on the pr=
ocedure)<BR><BR>Thanks<BR><BR>Tom<BR>--<BR>For archives and unsub http://ma=
il.lancaironline.net:81/lists/lml/List.html</FONT></BLOCKQUOTE></DIV></FONT=
></DIV></DIV></BLOCKQUOTE></td></tr></table>
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