X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 718385 for flyrotary@lancaironline.net; Sun, 11 Sep 2005 10:23:35 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.60 ([204.127.135.60]) by worldnet.att.net (mtiwmhc12) with SMTP id <20050911142250112004so48e>; Sun, 11 Sep 2005 14:22:50 +0000 Received: from [209.247.222.88] by 204.127.135.60; Sun, 11 Sep 2005 14:22:50 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] mystery inflight fuel pressure drop Date: Sun, 11 Sep 2005 14:22:50 +0000 Message-Id: <091120051422.1220.43243DB9000F22C1000004C42160383116019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_1220_1126448570_0" --NextPart_Webmail_9m3u9jl4l_1220_1126448570_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Perry, Dave Leonard had similar issue recently.........Was pump going bad !! -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from Perry Casson : -------------- > Had a small issue on my last flight that I can not explain - anyone care > to venture a guess what was going on? > > I was hmmmm-ing along at 7500' on friday about 60 minutes into a 2 hour > flight when my EIS low fuel pressure alarm went off and fuel pressure > had dropped to 29 psi (alarm set at 30 psi) and the engine went a bit > lean. I switched on my backup pump and fuel pressure instantly went > back to the normal 38 psi. Flew like that for a couple minutes and then > decided to do I bit of investigation so I turn the backup pump back off > but the fuel pressure remain at the normal 38 psi for the rest of the > flight. No other problems other than I seem to be running a bit leaner > than normal for a 12 o-clock setting on the EC-2 mixture control. > > My install is pretty much a clone of Tracy's pre-Renisis fuel system > other than I've got a high wing (Glastar). Feed and return from left > tank, fuel line y after a fuel shutoff valve, inline fuel filters > upstream of parallel Federal Mogul pumps mounted on cockpit side of > firewall, using stock 89 RX-7 pressure regulator, 88 NA Injectors, no > damper. > > I've been try to come with a explanation that would account for such a > issue and other than the fuel pressure regulator may have got stuck and > the extra flow from turning on the second pump unstuck it. > > Perry Casson > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ --NextPart_Webmail_9m3u9jl4l_1220_1126448570_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Perry,
    Dave Leonard had similar issue recently.........Was pump going bad !!
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from Perry Casson <pcasson@sasktel.net>: --------------


> Had a small issue on my last flight that I can not explain - anyone care
> to venture a guess what was going on?
>
> I was hmmmm-ing along at 7500' on friday about 60 minutes into a 2 hour
> flight when my EIS low fuel pressure alarm went off and fuel pressure
> had dropped to 29 psi (alarm set at 30 psi) and the engine went a bit
> lean. I switched on my backup pump and fuel pressure instantly went
> back to the normal 38 psi. Flew like that for a couple minutes and then
> decided to do I bit of investigation so I turn the backup pump back off
> but the fuel pressure remain at the normal 38 psi for the rest of the
> flight. No other problems other than I seem to be running a bit leaner
> than normal for a 12 o-clock setting on the EC-2 mixture control.
>
> My install is pretty much a clone of Tracy's pre-Renisis fuel system
> other than I've got a high wing (Glastar). Feed and return from left
> tank, fuel line y after a fuel shutoff valve, inline fuel filters
> upstream of parallel Federal Mogul pumps mounted on cockpit side of
> firewall, using stock 89 RX-7 pressure regulator, 88 NA Injectors, no
> damper.
>
> I've been try to come with a explanation that would account for such a
> issue and other than the fuel pressure regulator may have got stuck and
> the extra flow from turning on the second pump unstuck it.
>
> Perry Casson
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
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