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References: <list-4656074@logan.com>
To: flyrotary@lancaironline.net
Subject: Re: [FlyRotary] Fuel rail pressure
Date: Mon, 27 Dec 2010 18:53:00 -0500
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It seems to me that the fuel would have to be pretty hot for the vapor pre=
ssure to exceed 40 psi and cause vapor lock. Running the fuel pump in such=
 a case would cause coller fuel to flow through the rail and back to the=
 tank.=20

Brian Trubee






-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, Dec 27, 2010 3:49 pm
Subject: [FlyRotary] Fuel rail pressure



=20
Also remember that when you are starting the engine you are starting it un=
der a load.  This is different then in a car config where in a car you are=
 starting it with no load attached to the crankshaft.  If the fuel rails=
 are getting so hot that they are vaporizing I would think this would caus=
e an excess pressure in the fuel system and be very dangerous.  This is no=
t a problem I have ever had in a car.  What is causing this besides poor=
 ventilation?
The pressure in the fuel rail can never exceed the setting of the pressure=
 regulator; which should bear about 40 psi engine off. That=E2=80=99s true=
 even if you call the e-shaft a crankshaftJ.
Al
=20


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<font color=3D'black' size=3D'2' face=3D'arial'>
<div>It seems to me that the fuel would have to be pretty hot for the vapo=
r pressure to exceed 40 psi and cause vapor lock. Running the fuel pump in=
 such a case would cause coller fuel to flow through the rail and back to=
 the tank. </div>


<div>&nbsp;</div>


<div>Brian Trubee<br>
<br>
</div>


<div style=3D"CLEAR: both"></div>
<br>
<br>


<div style=3D"FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt"=
>-----Original Message-----<br>
From: Al Gietzen &lt;ALVentures@cox.net&gt;<br>
To: Rotary motors in aircraft &lt;flyrotary@lancaironline.net&gt;<br>
Sent: Mon, Dec 27, 2010 3:49 pm<br>
Subject: [FlyRotary] Fuel rail pressure<br>
<br>


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<div class=3DSection1>

<div class=3DMsoNormal><FONT size=3D3 face=3D"Times New Roman"><SPAN style=
=3D"FONT-SIZE: 12pt">&nbsp;</SPAN></FONT></div>


<div style=3D"MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 0.5in; MARGIN-RIGHT: 0in"=
 class=3DMsoNormal><FONT size=3D3 face=3D"Times New Roman"><SPAN style=3D"=
FONT-SIZE: 12pt">Also remember that when you are starting the engine you=
 are starting it under a load. &nbsp;This is different then in a car confi=
g where in a car you are starting it with no load attached to the cranksha=
ft. &nbsp;If the fuel rails are getting so hot that they are vaporizing I=
 would think this would cause an excess pressure in the fuel system and be=
 very dangerous. &nbsp;This is not a problem I have ever had in a car. &nb=
sp;What is causing this besides poor ventilation?</SPAN></FONT></div>


<div style=3D"MARGIN-BOTTOM: 12pt" class=3DMsoNormal><FONT color=3Dblue si=
ze=3D2 face=3DVerdana><SPAN style=3D"FONT-FAMILY: Verdana; COLOR: blue; FO=
NT-SIZE: 11pt">The pressure in the fuel rail can never exceed the setting=
 of the pressure regulator; which should bear about 40 psi engine off. Tha=
t=E2=80=99s true even if you call the e-shaft a crankshaft</SPAN></FONT><F=
ONT color=3Dblue size=3D2 face=3DWingdings><SPAN style=3D"FONT-FAMILY: Win=
gdings; COLOR: blue; FONT-SIZE: 11pt">J</SPAN></FONT><FONT color=3Dblue si=
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NT-SIZE: 11pt">.</SPAN></FONT></div>


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ze=3D2 face=3DVerdana><SPAN style=3D"FONT-FAMILY: Verdana; COLOR: blue; FO=
NT-SIZE: 11pt">Al</SPAN></FONT></div>


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