Return-Path: Received: from fed1rmmtao06.cox.net ([68.230.241.33] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 540811 for flyrotary@lancaironline.net; Sun, 21 Nov 2004 11:31:50 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.33; envelope-from=ronmilligan@cox.net Received: from Ron ([68.111.70.51]) by fed1rmmtao06.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041121163115.PUFF28622.fed1rmmtao06.cox.net@Ron> for ; Sun, 21 Nov 2004 11:31:15 -0500 From: "Ron Milligan" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: inflight fuel transfer (was Re: how do you carry, and measure oil?) Date: Sun, 21 Nov 2004 08:31:09 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D9_01C4CFA4.738F8BF0" X-Mailer: Microsoft Office Outlook, Build 11.0.6353 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: thread-index: AcTP2tBv0EFFF5zrQKuYSzP+BzfoJwADGj1g Message-Id: <20041121163115.PUFF28622.fed1rmmtao06.cox.net@Ron> This is a multi-part message in MIME format. ------=_NextPart_000_00D9_01C4CFA4.738F8BF0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit That was me who asked. Now that I have my fuel system mostly plumbed you tell me this! Oh well, in a few years I'll let you know how my two EFI pumps do against my facet. Ron Milligan RV7 QB Fuse Aliso Viejo CA _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy Sent: Sunday, November 21, 2004 7:00 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: inflight fuel transfer (was Re: how do you carry, and measure oil?) Speaking of fuel transfer, my system is like Tracy's, in that I feed from only one tank, and use the other to transfer to the feed tank. The transfer pump is a lowly Facet 5-6 psi pump. The feed tank has two high pressure EFI pumps, and one AN-6 return line from the regulator. My transfer pump Tees into the return line from the regulator. A while back, someone asked if the return from the regulator would overpower the Facet pump, and keep fuel from being transferred to the feed tank. The answer is that it can be a problem if you're running both EFI pumps. My normal flight mode is to run both EFI pumps at all times. I test them individually on pre-flight, and would turn one off if I lost an alternator, but normally, they stay on. I found that this causes so much flow in the return line that it does overpower the Facet pump. I bet I could leave the Facet on all the time, and it MIGHT transfer enough to make up for what I burn. In other words, the transfer is very slow. Turning off one of the EFI pumps improves this considerably. If I were doing this over, I'd have separate fittings for return fuel from the regulator, and for transfer fuel from the non-feed tank. Cheers, Rusty (fresh out of comments) ------=_NextPart_000_00D9_01C4CFA4.738F8BF0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

That was me who asked.  Now = that I have my fuel system mostly plumbed you tell me this!  Oh well, in a = few years I’ll let you know how my two EFI pumps do against my = facet.

 

Ron = Milligan

RV7 QB = Fuse

Aliso Viejo = CA

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy
Sent: Sunday, November = 21, 2004 7:00 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = inflight fuel transfer (was Re: how do you carry, and measure = oil?)

 

 

Speaking of fuel transfer, my system = is like Tracy's, in that I feed from only one tank, and use the other to transfer to = the feed tank.  The transfer pump is a lowly Facet 5-6 psi pump.  = The feed tank has two high pressure EFI pumps, and one AN-6 return line from = the regulator.  My transfer pump Tees into the return line from the regulator. 

 

A while back, someone asked if the = return from the regulator would overpower the Facet pump, and keep fuel from = being transferred to the feed tank.  The answer is that it can be a = problem if you're running both EFI pumps.  My normal flight mode is to run = both EFI pumps at all times.  I test them individually on pre-flight, = and would turn one off if I lost an alternator, but normally, they stay = on.  I found that this causes so much flow in the return line that it does = overpower the Facet pump.  I bet I could leave the Facet = on all the time, and it MIGHT transfer enough to make up for what I = burn.   In other words, the = transfer is very slow.  Turning off one of the EFI pumps improves this = considerably.  If I were doing this over, I'd have separate fittings for return fuel = from the regulator, and for transfer fuel from the non-feed tank.  =

 

Cheers,

Rusty (fresh out of = comments)

 

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