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Message-ID: <1c23473f05090509574bb442b0@mail.gmail.com>
Date: Mon, 5 Sep 2005 09:57:05 -0700
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Another great flying day = another day of troubleshooting
In-Reply-To: <list-711572@logan.com>
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>=20
>  Actually, Dave you had a higher pressure ratio (manifold to ambient) at=
=20
> 10,000 feet with 26" boost than at sea level with 36". At sea level the=
=20
> pressure ratio would be 36/29.92 =3D 1.20. At 10,000 ft ambient pressure =
=3D=20
> 20.57 " hg , so the pressure ratio would be 26/20.57 =3D 1.26. Not much=
=20
> greater, but it was higher by approx.1.23" Hg. (1.20 -1.26 =3D .06 *20.57=
 =3D=20
> 1.234" Hg).=20
>=20
> Ed A
>=20
> Right. But what does the plug know about the ambient pressure? I thought=
=20
that it was just the absolute density of the charge that was contributing t=
o=20
SAG.

--=20
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html

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<div>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<blockquote dir=3D"ltr" style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MAR=
GIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<p>&nbsp;Actually, Dave you had a higher pressure ratio (manifold to ambien=
t) at 10,000 feet with 26&quot; boost than at sea level with 36&quot;.&nbsp=
; At sea level the pressure ratio would be 36/29.92 =3D 1.20.&nbsp; At 10,0=
00 ft ambient pressure =3D=20
20.57 &quot; hg , so the pressure ratio&nbsp;would&nbsp;&nbsp;be&nbsp;26/20=
.57 =3D 1.26.&nbsp; Not much greater, but it was higher by approx.1.23&quot=
; Hg. (1.20 -1.26 =3D .06 *20.57 =3D 1.234&quot; Hg). </p>
<p><font face=3D"Arial">Ed A</font></p></blockquote></blockquote></div>Righ=
t.&nbsp; But what does the plug know about the ambient pressure?&nbsp; I th=
ought that it was just the absolute density of the charge that was contribu=
ting to SAG.
<br><br>-- <br>Dave Leonard<br>Turbo Rotary RV-6 N4VY<br><a href=3D"http://=
members.aol.com/_ht_a/rotaryroster/index.html">http://members.aol.com/_ht_a=
/rotaryroster/index.html</a><br><a href=3D"http://members.aol.com/_ht_a/vp4=
skydoc/index.html">
http://members.aol.com/_ht_a/vp4skydoc/index.html</a>=20

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