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Date: Tue, 25 Jun 2013 21:10:05 -0700
Message-ID: <CAOFHbnpY0cj7eOxA26+8OsgHziD5UgWacqYUeHATw1HWjdNvZA@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Blown engine
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Lynn,

I have to say that I do not know exactly.  All I did was follow Tracy's
directions (which he says are conservative).   I cant recall exactly how
much that works out to, but it is set at something like 25"map.    But then
his computer retards the advance at higher RPM and MP.  In casual
conversations, he cannot recall exactly the algorithm but he says he
developed it on the advise of some car racers.  Maybe that was you?

Since I don't even have a good knock sensor or wide band O2 sensor, that
was the best I could do for my one-off adventure at Reno.


On Tue, Jun 25, 2013 at 7:05 AM, <Lehanover@aol.com> wrote:

> **
> *What is your maximum ignition advance?*
> **
> *Lynn E. Hanover*
>
>  In a message dated 6/25/2013 9:20:29 A.M. Eastern Daylight Time,
> wdleonard@gmail.com writes:
>
> Detonation can definitely cause the damage you saw, but that would be my
> second most likely event after FOD.  To get detonation you would have to
> have not checked your timing very well AND gone to nearly full power.
>
> That turbo is very similar to mine.  I wish I had a larger A/R but .81 is
> adequate and worked for me to make over 300hp at Reno.  But even then I was
> still not using full throttle.  I set a limit of 45 inches for Reno.  My
> normal limit is 40 inches for take off (and that is short periods only).  I
> currently have the waste gate removed and the turbo will only do about 38
> inches at sea level..  which is perfect for the RV and keeps a rein on my
> lead-foot (or fist).
>
>


-- 
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

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<div dir=3D"ltr">Hi Lynn,=A0<div><br></div><div style>I have to say that I =
do not know exactly. =A0All I did was follow Tracy&#39;s directions (which =
he says are conservative). =A0 I cant recall exactly how much that works ou=
t to, but it is set at something like 25&quot;map. =A0 =A0But then his comp=
uter retards the advance at higher RPM and MP. =A0In casual conversations, =
he cannot recall exactly the algorithm but he says he developed it on the a=
dvise of some car racers. =A0Maybe that was you?</div>
<div style><br></div><div style>Since I don&#39;t even have a good knock se=
nsor or wide band O2 sensor, that was the best I could do for my one-off ad=
venture at Reno.</div></div><div class=3D"gmail_extra"><br><br><div class=
=3D"gmail_quote">
On Tue, Jun 25, 2013 at 7:05 AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:L=
ehanover@aol.com" target=3D"_blank">Lehanover@aol.com</a>&gt;</span> wrote:=
<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-lef=
t:1px #ccc solid;padding-left:1ex">
<u></u>



<div style=3D"font-size:12pt;font-family:Arial"><font color=3D"#000000" siz=
e=3D"3" face=3D"Arial">
<div><strong>What is your maximum ignition advance?</strong></div>
<div><strong></strong>=A0</div>
<div><strong>Lynn E. Hanover</strong></div><div class=3D"im">
<div>=A0</div>
<div>
<div>In a message dated 6/25/2013 9:20:29 A.M. Eastern Daylight Time,=20
<a href=3D"mailto:wdleonard@gmail.com" target=3D"_blank">wdleonard@gmail.co=
m</a> writes:</div>
<blockquote style=3D"PADDING-LEFT:5px;MARGIN-LEFT:5px;BORDER-LEFT:blue 2px =
solid"><font style=3D"BACKGROUND-COLOR:transparent" color=3D"#000000" face=
=3D"Arial">Detonation can definitely cause the damage you saw, but that wou=
ld=20
  be my second most likely event after FOD. =A0To get detonation you would=
=20
  have to have not checked your timing very well AND gone to nearly full po=
wer.=20
  <div><br></div>
  <div>That turbo is very similar to mine. =A0I wish I had a larger A/R but=
=20
  .81 is adequate and worked for me to make over 300hp at Reno. =A0But even=
=20
  then I was still not using full throttle. =A0I set a limit of 45 inches f=
or=20
  Reno. =A0My normal limit is 40 inches for take off (and that is short=20
  periods only). =A0I currently have the waste gate removed and the turbo=
=20
  will only do about 38 inches at sea level.. =A0which is perfect for the R=
V=20
  and keeps a rein on my lead-foot (or=20
fist).</div></font></blockquote></div></div></font></div></blockquote></div=
><br><br clear=3D"all"><div><br></div>-- <br>David Leonard<br><br>Turbo Rot=
ary RV-6 N4VY<br><a href=3D"http://N4VY.RotaryRoster.net">http://N4VY.Rotar=
yRoster.net</a><br>
<a href=3D"http://RotaryRoster.net">http://RotaryRoster.net</a>
</div>

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