Mailing List flyrotary@lancaironline.net Message #17044
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: Vapor lock in sump/header tank.
Date: Sat, 12 Feb 2005 09:24:04 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
A vent line from the top of your sump tank up to the top of both of your main tanks, but not tied into the main tank vent system.  
 
Paul, where are the lines physically located on your header tank now?  Are they all at, or near the bottom?  After reading all this info about vapor lock and header tanks, I have to agree that this is probably the prime suspect at the moment.  Vapor that builds up in the top of the tank has to have somewhere to go.  
 
I'm also assuming that you don't have return lines to your fuel tanks, which is probably why you're running the header tank in the first place.  I've been sketching this on a notepad, and so far haven't figured out a way to make this work without adding a vent somewhere.  
 
I fear the reply to this question, but how hard would it be to add a return line to at least one of your tanks?  
 
Rusty (already behind schedule for the day) 
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