Return-Path: Received: from wb2-a.mail.utexas.edu ([128.83.126.136] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP-TLS id 537769 for flyrotary@lancaironline.net; Thu, 18 Nov 2004 15:48:42 -0500 Received-SPF: none receiver=logan.com; client-ip=128.83.126.136; envelope-from=msteitle@mail.utexas.edu Received: (qmail 34110 invoked from network); 18 Nov 2004 20:48:10 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO hrs-mark.mail.utexas.edu) (146.6.191.101) by wb2.mail.utexas.edu with SMTP; 18 Nov 2004 20:48:10 -0000 Message-Id: <5.1.1.5.2.20041118143842.021b9750@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Thu, 18 Nov 2004 14:48:01 -0600 To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Re: External Fuel Pump ... In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_80496140==.ALT" --=====================_80496140==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Bill, Bulent just about described my system to a Tee. Only thing I can add is to consider installing a bleeder circuit which bypasses the regulator that can prevent an airlock in the system if/when you run a tank dry. The Eggenfelner Subaru bunch had a couple of "mishaps" that was traced to that problem. I was able to duplicate that serious fuel system shortcoming on the ground. The fix was to install an air bleed circuit as I have described above. Quote from the Eggenfelner site: A mandatory fuel regulator and regulator bypass bleed valve kit is now available and is required in order to regain fuel pressure in an installation where fuel cavitations is likely. This is any low winged airplane with an unshielded fuel pump installation operating in summer temperatures on auto gas. Vapor lock can occur in any airplane however so this upgrade still should be done. Engines delivered from May 2004 have this installed. Mark S. At 12:06 PM 11/18/2004 -0800, you wrote: >Mark > >How does the 3 port work? One line in (fuel supply), one line out to >injectors, and line from regulator back to tank? in this case wouldn't the >line from regulator to injectors be dead-ended? > >Bill > >JIm, >I'm using a 3-port Mallory fuel pressure regulator. It is supposed to be >capable of regulation between 3 and 65 psi. They have other models as >well. See >http://www.fastpts.com/cgi-bin/hazel-cgi/hazel.cgi?action=serve&item=malreg.html > >Mark S. > >At 12:49 PM 11/18/2004 -0600, you wrote: >>I'm still wondering if: >>Can any (or all) electric pumps can be plumbed in series and pass fuel >>when shut off >>Are there any regulators that can be adjusted as low as 25 psi >> >>Does anybody have these answers for me ? ... Jim S. >> >> >>John Slade wrote: >> >>>>How does one get hold of Bruce? >>>I'd recommend a handshake. John (Still trying to get used to making my >>>own breakfast) >>> >> >>>>Homepage: http://www.flyrotary.com/ >>>>Archive: http://lancaironline.net/lists/flyrotary/List.html --=====================_80496140==.ALT Content-Type: text/html; charset="us-ascii" Bill,
Bulent just about described my system to a Tee. Only thing I can add is to consider installing a bleeder circuit which bypasses the regulator that can prevent an airlock in the system if/when you run a tank dry. The Eggenfelner Subaru bunch had a couple of "mishaps" that was traced to that problem. I was able to duplicate that serious fuel system shortcoming on the ground. The fix was to install an air bleed circuit as I have described above.

Quote from the Eggenfelner site:

A mandatory fuel regulator and regulator bypass bleed valve kit is now available and is required in order to regain fuel pressure in an installation where fuel cavitations is likely. This is any low winged airplane with an unshielded fuel pump installation operating in summer temperatures on auto gas. Vapor lock can occur in any airplane however so this upgrade still should be done. Engines delivered from May 2004 have this installed.

Mark S.

At 12:06 PM 11/18/2004 -0800, you wrote:

Mark

How does the 3 port work? One line in (fuel supply), one line out to injectors, and line from regulator back to tank? in this case wouldn't the line from regulator to injectors be dead-ended?

Bill

JIm,
I'm using a 3-port Mallory fuel pressure regulator. It is supposed to be capable of regulation between 3 and 65 psi. They have other models as well. See http://www.fastpts.com/cgi-bin/hazel-cgi/hazel.cgi?action=serve&item=malreg.html

Mark S.

At 12:49 PM 11/18/2004 -0600, you wrote:

I'm still wondering if:
Can any (or all) electric pumps can be plumbed in series and pass fuel when shut off
Are there any regulators that can be adjusted as low as 25 psi

Does anybody have these answers for me ? ... Jim S.

John Slade wrote:

How does one get hold of Bruce?

I'd recommend a handshake. John (Still trying to get used to making my own breakfast)

Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html

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