X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.2.9) with ESMTP id 3232710 for flyrotary@lancaironline.net; Tue, 21 Oct 2008 13:15:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta03.mail.rr.com with ESMTP id <20081021171457.SEVJ5091.cdptpa-omta03.mail.rr.com@computername> for ; Tue, 21 Oct 2008 17:14:57 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Water in Fuel?? (or another adventure in the aviation events of Ed Anderson) Date: Tue, 21 Oct 2008 13:15:04 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002A_01C9337F.07F61240" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AckzN0iKt5VxKDb6RrqC2vl+SVVnLAAaKOeQ X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Message-Id: <20081021171457.SEVJ5091.cdptpa-omta03.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_002A_01C9337F.07F61240 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Tuesday, October 21, 2008 1:43 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Water in Fuel?? (or another adventure in the aviation events of Ed Anderson) John, I think your analysis makes lots of sense for a gravity fed fuel system (i.e. no pumps). However, I would think that the EFI pumps would churn the water and fuel together pretty thoroughly. Yes the pump will mix it up pretty well; but it will separate out again in the line.. Ok, thanks, Al. I had no idea how long it would take water to separate out from the fuel. If the water separates out from the mix fast then since my secondary injectors are down stream and below (gravity wise) - in fact the lowest part of my fuel system - that all plays with water in the fuel. The water may have been more completely separated back out from the gasoline by the time it got to the secondary injectors . Or to visualize a U shaped fuel line and imagine where the heavier water would be and the lighter fuel would be. So even though the fluid might have been flowing - the odds are the secondary injectors saw more water than the primary injectors. Ed ------=_NextPart_000_002A_01C9337F.07F61240 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Tuesday, October = 21, 2008 1:43 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Water in Fuel?? (or another adventure in the aviation events of Ed = Anderson)

 

John, I think = your analysis makes lots of sense for a gravity fed fuel system (i.e. no pumps).  However, I would think that the EFI pumps would churn the = water and fuel together pretty thoroughly. 

Yes the pump will mix it up = pretty well; but it will separate out again in the line..

 

 

Ok, thanks, Al.  I had no idea = how long it would take water to separate out from the = fuel.

 

If  the water separates out = from the mix fast then since my secondary injectors are down stream and below = (gravity wise) – in fact the lowest part of my fuel system – that all = plays with water in the fuel.  The water may have been more completely = separated back out from the gasoline by the time it got to the secondary injectors = .  Or to visualize a U shaped fuel line and imagine where the heavier water = would be and the lighter fuel would be.  So even though the fluid might = have been flowing – the odds are the secondary injectors saw more water = than the primary injectors.

 

Ed

 



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