X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from aspensprings.uwyo.edu ([129.72.10.32] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTPS id 4881547 for flyrotary@lancaironline.net; Thu, 24 Feb 2011 15:36:41 -0500 Received-SPF: none receiver=logan.com; client-ip=129.72.10.32; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht2.uwyo.edu (ponyexpress-ht2.uwyo.edu [10.84.60.209]) by aspensprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id p1OKa04S021696 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Thu, 24 Feb 2011 13:36:01 -0700 (MST) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-mb5.uwyo.edu ([fe80::9813:248c:2d68:a28b]) by ponyexpress-ht2 ([10.84.60.209]) with mapi; Thu, 24 Feb 2011 13:36:00 -0700 From: "Steven W. Boese" To: Rotary motors in aircraft Date: Thu, 24 Feb 2011 13:36:03 -0700 Subject: RE: [FlyRotary] Fwd: Fuel injector pump cooling?? Thread-Topic: [FlyRotary] Fwd: Fuel injector pump cooling?? Thread-Index: AcvUWFOa5wYw9M4uTZqgqY0u0X06nAABw0WA Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_E1AA3B1AF41D8049B1E3FBD5E225626008872D209Bponyexpressmb_" MIME-Version: 1.0 --_000_E1AA3B1AF41D8049B1E3FBD5E225626008872D209Bponyexpressmb_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Charlie, I initially had my RV set up with a Facet transfer pump with an external ch= eck valve. The check valve spring was replaced with a slightly stronger on= e so that it served both the anti back flow and anti siphon functions. The= high percentage of the time that the Facet transfer pump was operating con= vinced me to change to the type (not the exact part) of pump you are consi= dering. The pump seemed reliable but after a couple of instances of transf= erring fuel out the receiving tank's vent in spite of a timer on the transf= er pump, I eliminated the transfer function altogether. The possibility of= applying up to 90 psi to the receiving tank if its vent malfunctioned did = not suit me. It would not take anywhere near this pressure to fail the tan= k. The procedure for leak testing the fuel tanks cautions not to apply eve= n a couple of psi to them. The limitation here really was me, though, not = the equipment. Steve Boese RV6A 1986 13B NA RD1A EC2 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Charlie England Sent: Thursday, February 24, 2011 12:23 PM To: Rotary motors in aircraft Subject: [FlyRotary] Fwd: Fuel injector pump cooling?? Anyone see any issues with one of the automotive in-tank pumps being used o= utside the tank? Looking at the overall pump/pickup/regulator/level sensor/= etc assemblies in most auto fuel tanks, it would appear that the pump itsel= f would be above the level of the fuel anyway if the tank is less than 1/4 = full. I've been looking for a Facet transfer pump that has both a backflow valve = & an anti-siphon valve (40257 is one) but they are very hard to find & expe= nsive when you find them. During my search, I ran across this: http://www.amazon.com/gp/product/B000BMBSS0/ref=3Dpd_lpo_k2_dp_sr_3?pf_rd_p= =3D486539851&pf_rd_s=3Dlpo-top-stripe-1&pf_rd_t=3D201&pf_rd_i=3DB002YP4Q3Q&= pf_rd_m=3DATVPDKIKX0DER&pf_rd_r=3D1JFK34G48EBF5R93EB2Y The application appears to be 87-98 GM products. It appears to be very similar to the 'standard' in-line pump that Tracy sup= plies, with the exception of plastic components in the output end. Assuming= that it's a positive displacement gear pump, it should supply both the bac= kflow & anti-siphon features I desire & at roughly $30 shipped, it's cheape= r than even the cheapest Facet 'solid state' transfer pumps. I'm hoping tha= t cooling/lube won't be an issue as long as it isn't run 'dry' for more tha= n a few seconds at the end of a transfer cycle. Charlie --_000_E1AA3B1AF41D8049B1E3FBD5E225626008872D209Bponyexpressmb_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

= Charlie,<= /o:p>

 

I initially had m= y RV set up with a Facet transfer pump with an external check valve.  = The check valve spring was replaced with a slightly stronger one so that it= served both the anti back flow and anti siphon functions.  The high p= ercentage of the time that the Facet transfer pump was operating convinced = me to change to the type (not the exact part) of pump you are  conside= ring.  The pump seemed reliable but after a couple of instances of tra= nsferring fuel out the receiving tank’s vent in spite of a timer on t= he transfer pump, I eliminated the transfer function altogether.  The = possibility of applying up to 90 psi to the receiving tank if its vent malf= unctioned did not suit me.  It would not take anywhere near this press= ure to fail the tank.  The procedure for leak testing the fuel tanks c= autions not to apply even a couple of psi to them.  The limitation her= e really was me, though, not the equipment.

 

Steve Boese

RV6A 1986 13B NA RD1A EC2

 

 

 <= /span>

 

From: Rotary moto= rs in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Cha= rlie England
Sent: Thursday, February 24, 2011 12:23 PM
To:= Rotary motors in aircraft
Subject: [FlyRotary] Fwd: Fuel inj= ector pump cooling??

=  

Anyone = see any issues with one of the automotive in-tank pumps being used outside = the tank? Looking at the overall pump/pickup/regulator/level sensor/etc ass= emblies in most auto fuel tanks, it would appear that the pump itself would= be above the level of the fuel anyway if the tank is less than 1/4 full.
I've been looking for a Facet transfer pump that has both a backflow = valve & an anti-siphon valve (40257 is one) but they are very hard to f= ind & expensive when you find them. During my search, I ran across this= :
http://www.amazon.com/gp/product/B000BMBSS0/ref=3D= pd_lpo_k2_dp_sr_3?pf_rd_p=3D486539851&pf_rd_s=3Dlpo-top-stripe-1&pf= _rd_t=3D201&pf_rd_i=3DB002YP4Q3Q&pf_rd_m=3DATVPDKIKX0DER&pf_rd_= r=3D1JFK34G48EBF5R93EB2Y

The application appears to be 87-98 GM = products.

It appears to be very similar to the 'standard' in-line pu= mp that Tracy supplies, with the exception of plastic components in the out= put end. Assuming that it's a positive displacement gear pump, it should su= pply both the backflow & anti-siphon features I desire & at roughly= $30 shipped, it's cheaper than even the cheapest Facet 'solid state' trans= fer pumps. I'm hoping that cooling/lube won't be an issue as long as it isn= 't run 'dry' for more than a few seconds at the end of a transfer cycle.
Charlie

= --_000_E1AA3B1AF41D8049B1E3FBD5E225626008872D209Bponyexpressmb_--