Return-Path: <13brv3@bellsouth.net> Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP id 726173 for flyrotary@lancaironline.net; Sat, 12 Feb 2005 10:24:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050212152354.IHAI1992.imf17aec.mail.bellsouth.net@rd> for ; Sat, 12 Feb 2005 10:23:54 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Vapor lock in sump/header tank. Date: Sat, 12 Feb 2005 09:24:04 -0600 Message-ID: <021e01c51116$e2d3ef20$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_021F_01C510E4.98397F20" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_021F_01C510E4.98397F20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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. =20 =20 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. =20 =20 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. =20 =20 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? =20 =20 Rusty (already behind schedule for the day)=20 ------=_NextPart_000_021F_01C510E4.98397F20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
A vent line from the top of your sump tank up to the top = of both=20 of your main tanks, but not tied into the main tank vent = system.  
 
Paul, where=20 are the lines physically located on your header tank now?  Are = they=20 all at, or near the bottom?  After reading all this info=20 about vapor lock and header tanks, I have to agree that = this=20 is probably the prime suspect at the moment.  Vapor that = builds=20 up in the top of the tank has to have somewhere to=20 go.  
 
I'm also=20 assuming that you don't have return lines to your fuel tanks, which = is=20 probably why you're running the header tank in the first place.  = I've been=20 sketching this on a notepad, and so far haven't figured out a way to = make this=20 work without adding a vent=20 somewhere.  
 
I fear the=20 reply to this question, but how hard would it be to add a return line to = at=20 least one of your = tanks?  
 
Rusty=20 (already behind schedule for the=20 day) 
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