X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.3.2) with ESMTP id 968125 for flyrotary@lancaironline.net; Mon, 30 May 2005 15:53:40 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.71; envelope-from=13brv3@bellsouth.net Received: from ibm66aec.bellsouth.net ([65.6.194.9]) by imf23aec.mail.bellsouth.net with ESMTP id <20050530195255.XFOG8541.imf23aec.mail.bellsouth.net@ibm66aec.bellsouth.net> for ; Mon, 30 May 2005 15:52:55 -0400 Received: from rd ([65.6.194.9]) by ibm66aec.bellsouth.net with ESMTP id <20050530195254.BHQU5308.ibm66aec.bellsouth.net@rd> for ; Mon, 30 May 2005 15:52:54 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: will EFI pumps pump air Date: Mon, 30 May 2005 14:53:14 -0500 Message-ID: <001c01c56551$37a39170$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C56527.4ECD8970" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C56527.4ECD8970 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable You *have* replicated my system because I also "T" the transfer pump = into the EFI return line to feed tank. It has no problem transferring fuel = with this arrangement. Facet makes these pumps in several different pressure ranges. I think mine is the 4-6 psi model. I used 3/8" line in this portion of system. Did you use something smaller?=20 =20 Hi Tracy, =20 That's interesting, because I didn't recall that you Teed yours also. = One difference I know we've discussed is the fact that you were smart enough = to run your return line to the top outboard end of the tank, so it wouldn't = be submerged. Mine is just a fitting on the removable cover where the fuel level sender is. That causes me some problems with the fuel wanting to = seek a common level between tanks when it's more than about half full, but I doubt it's the return problem. =20 =20 I believe my pump is a 4-6 psi version, but I'd have to look to be sure. The whole fuel system is AN-6 (3/8") line, with the exception of the = tank vents, which are AN-4 I believe. =20 =20 I also connect my transfer pump near the top of the fuselage, so the = facet has to push the fuel a couple feet uphill, to where it meets the return line. Perhaps that, and the one way check valve I just installed are = just too much for it. What I need is a pump the same size as what I have, = but in about 10-15 psi. Seems like I looked, but couldn't find any such = animal. =20 =20 Thanks, Rusty (off to remove the VW engine from the Sonerai... long story, but I still have two unflyable planes) =20 ------=_NextPart_000_001D_01C56527.4ECD8970 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
  You *have*=20 replicated my system because I also "T" the transfer pump into the EFI = return=20 line to feed tank.   It has no problem transferring fuel with = this=20 arrangement.  Facet makes these pumps in several different pressure = ranges.  I think mine is the 4-6 psi model.   I = used=20 3/8" line in this portion of system.  Did you use something = smaller? 
 
Hi=20 Tracy,
 
That's=20 interesting, because I didn't recall that you Teed yours also.  One = difference I know we've discussed is the fact that you were smart = enough to=20 run your return line to the top outboard end of the tank, so it = wouldn't be=20 submerged.  Mine is just a fitting on the removable cover = where the=20 fuel level sender is.  That causes me some problems with = the fuel=20 wanting to seek a common level between tanks when it's more than about = half=20 full, but I doubt it's the return = problem.  
 
I = believe my pump=20 is a 4-6 psi version, but I'd have to look to be sure.  The = whole fuel=20 system is AN-6 (3/8") line, with the exception of the tank = vents,=20 which are AN-4 I believe.  
 
I = also connect my=20 transfer pump near the top of the fuselage, so the facet has = to push=20 the fuel a couple feet uphill, to where it meets the return=20 line.  Perhaps that, and the one way check valve I just = installed are=20 just too much for it.  What I need is a pump the same size as = what I=20 have, but in about 10-15 psi.  Seems like I looked, but couldn't=20 find any such animal.  
 
Thanks,
Rusty=20 (off to remove the VW engine from the Sonerai... long story, but I = still=20 have two unflyable=20 planes)  
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