X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4248806 for flyrotary@lancaironline.net; Wed, 05 May 2010 13:20:00 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=sSauFczE/WgqiiCzXA/oBWyKBnhW4IlIwzxEkojSyMI= c=1 sm=0 a=Er6hwA6a1l4K/FyzC6NN7w==:17 a=ayC55rCoAAAA:8 a=arxwEM4EAAAA:8 a=QdXCYpuVAAAA:8 a=7g1VtSJxAAAA:8 a=ekHE3smAAAAA:20 a=UretUmmEAAAA:8 a=Ia-xEzejAAAA:8 a=3oc9M9_CAAAA:8 a=H5altMMb4-KHBgOeqgwA:9 a=BSwCRS2vuoonrVsTHXQA:7 a=QGapbx5qXa5jvTk6oF13z-6tO8AA:4 a=CjuIK1q_8ugA:10 a=1vhyWl4Y8LcA:10 a=EzXvWhQp4_cA:10 a=U8Ie8EnqySEA:10 a=SSmOFEACAAAA:8 a=svGcAeKONTF2Ph60G_sA:7 a=mypAIlFOIMEFK9rEFlXmk3iOK3EA:4 a=Er6hwA6a1l4K/FyzC6NN7w==:117 X-Cloudmark-Score: 0 X-Originating-IP: 75.181.123.159 Received: from [75.181.123.159] ([75.181.123.159:4794] helo=computername) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id DC/BF-22191-A98A1EB4; Wed, 05 May 2010 17:19:23 +0000 From: "Ed Anderson" Message-ID: To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: fuel filters Date: Wed, 5 May 2010 13:19:28 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01CAEC55.9725C290" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcrscKJ7BSa2c0fhQv+rnOgKMMax+AABX8wg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01CAEC55.9725C290 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I have a coarse filter before my two EFI pumps, two High Pressure Filters (one for each pump) after the pumps. My rationale is that I would prefer to keep junk out of the screens on the fuel injectors should something go amiss with a pump. If one pump failed in a mode that put debris in the flow, then that pump's filter should catch it and the other pump can continue to provide fuel (hopefully) to the still clean fuel injectors. If a pump should fail without a filter between it and the injectors then if debris plugged up the tiny screens in each fuel injector - then having the other pump pumping clean fuel would not help. My plan is that the coarse filter will likely catch any pump damaging debris before it gets to the pumps. Damaged pump putting debris into fuel line may be a unlikely scenario. But if it can happen, it can happen to me. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bktrub@aol.com Sent: Wednesday, May 05, 2010 12:32 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel filters After the fuel pumps. I have two fuel pumps, and I figure that they are less susceptible to clogging than the injectors. Why? Does this raise any flags? Brian Trubee ------=_NextPart_000_0006_01CAEC55.9725C290 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

I have a coarse filter before my = two EFI pumps, two High Pressure Filters (one for each pump) after the = pumps.  My rationale is that I would prefer to keep junk out of the screens on the = fuel injectors should something go amiss with a pump.  If one pump = failed in a mode that put debris in the flow, then that pump’s filter should = catch it and the other pump can continue to provide fuel (hopefully) to the still = clean fuel injectors.  If a pump should fail without a filter between it = and the injectors then if debris plugged up the tiny screens in each fuel = injector – then having the other pump pumping clean fuel would not help.  My = plan is that the coarse filter will likely catch any pump damaging debris before = it gets to the pumps. 

 

Damaged pump putting debris into = fuel line may be a unlikely scenario.   But if it can happen, it can = happen to me.

 

Ed

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bktrub@aol.com
Sent: Wednesday, May 05, = 2010 12:32 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = fuel filters

 

After the fuel pumps. I have two = fuel pumps, and I figure that they are less susceptible to clogging than the injectors. Why? Does this raise any flags?

 

=

Brian = Trubee

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