Return-Path: <finn.lassen@verizon.net>
Received: from out009.verizon.net ([206.46.170.131] verified)
  by logan.com (CommuniGate Pro SMTP 4.2.5)
  with ESMTP id 541296 for flyrotary@lancaironline.net; Sun, 21 Nov 2004 22:15:25 -0500
Received-SPF: pass
 receiver=logan.com; client-ip=206.46.170.131; envelope-from=finn.lassen@verizon.net
Received: from verizon.net ([4.12.145.173]) by out009.verizon.net
          (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP
          id <20041122031455.QKAE1396.out009.verizon.net@verizon.net>
          for <flyrotary@lancaironline.net>;
          Sun, 21 Nov 2004 21:14:55 -0600
Message-ID: <41A159AE.7080103@verizon.net>
Date: Sun, 21 Nov 2004 22:14:54 -0500
From: Finn Lassen <finn.lassen@verizon.net>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Bubbles in fuel line from pump
References: <list-541280@logan.com>
In-Reply-To: <list-541280@logan.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Authentication-Info: Submitted using SMTP AUTH at out009.verizon.net from [4.12.145.173] at Sun, 21 Nov 2004 21:14:55 -0600

BTW, the reason I have the filter between the pump inlet and flow sensor 
is to dampen the pulses from the pump. Otherwise, and especially at low 
flow, those pulses will rock the flow sensor turbine wheel back and 
forth giving a falsely high flow reading.

Finn

Jim Sower wrote:

> Transparent lines on ALL "suction" lines (upstream of firewall) would 
> be edifying.  Watch the bubbles as they appear and if/when they 
> increase.  Might try a pump just downstream of the selector valve 
> after you've studied the bubbles as outlined above.
>