X-Virus-Scanned: clean according to Sophos on Logan.com From: "Charlie England" Received: from mail-pf0-f181.google.com ([209.85.192.181] verified) by logan.com (CommuniGate Pro SMTP 6.2c1) with ESMTPS id 9581067 for flyrotary@lancaironline.net; Fri, 17 Mar 2017 16:34:32 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.181; envelope-from=ceengland7@gmail.com Received: by mail-pf0-f181.google.com with SMTP id o126so42120849pfb.3 for ; Fri, 17 Mar 2017 13:34:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=U0vYyZ1y497OCTN+E/naCcAyzTCwD57kEE4art/9Lnw=; b=QCGmQDSOF4V3lloEbWrTt3koBxghdbB3UCTw6fHdw+2sBf4wzINOUBlsuaV5Db4zJO bzB+ewhaXaRkLR9qMMEx5+5ZUBCRP45agS9ckDrEklBk/DJ4qgord/opD7Blyw1fij4U Cq2PvyOo50pauWJSUxznWSFKcyk0ndGFMHwCkSP8IeXo2qlOTnkZRHw4pknHQhV2cAUX PqWL8eyaX7i8KNErWYmFgZwZvbHf2PJhsvUPMrB4rsfyq4Fu9SFu26ce2oQOqTdCWlbb s59Pf7Eo2OBYdV1w4SaB+kOPx1e4Qj0iFKJKWzcXYqNbkJb7XIGoEpaOd83O1mysJt6G +2FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=U0vYyZ1y497OCTN+E/naCcAyzTCwD57kEE4art/9Lnw=; b=lA/dh9aNxbeIRJ83qcQAunFFf8boD0v9Wc94fNXdozeYoPCbaLS62Y9WjAY3JrRLVR a6nFxZziViJGwtxhbuW+fwC36hcDNyPycYUtPhafclMpzDdRrWQ17KTR0D7mX6Uu/qvn hyOUYh6hsrleSi1wh6eupB9jYcPceVSyvRyRl2UbtE6joU+TdGIiMrNnxcX7jyTPCr1I C2jErg5FBHb8X714T/r+rQxAmg2Xa/11oEEZZzHj/jGMzP/lAYJhEnvjfRb2vZmlyhuf uEWWI9e3TsnnaULruTA6Z5NnX3iq53bErsdFQfRxLPXca9IN6g520LDr1NkUNFXZae52 B+Vw== X-Gm-Message-State: AFeK/H3TnlLN12tIwwvb3n7Lq/X/6iXxoGKzJ46Khc3zDMZpUWqOFc4YYC6E9rBbYnMyC7LEXrkl5yDfebnoFQ== X-Received: by 10.98.201.212 with SMTP id l81mr18635805pfk.13.1489782855332; Fri, 17 Mar 2017 13:34:15 -0700 (PDT) MIME-Version: 1.0 Received: by 10.100.128.83 with HTTP; Fri, 17 Mar 2017 13:34:14 -0700 (PDT) In-Reply-To: References: Date: Fri, 17 Mar 2017 15:34:14 -0500 Message-ID: Subject: Re: [FlyRotary] Re: Fuel Pump and Regulator To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=94eb2c18864ce27e3d054af31932 --94eb2c18864ce27e3d054af31932 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hey Steve, not to hijack the thread, but which pump is that? I can't find that # on the NAPA web site. Thanks, Charlie On Fri, Mar 17, 2017 at 12:34 PM, Steven W. Boese < flyrotary@lancaironline.net> wrote: > Steve, > > > I used a stock Mazda 1986 fuel pressure regulator, two NAPA 2P4028 fuel > pumps in parallel, and an Andair duplex fuel selector valve. The fuel lin= es > are -6 (3/8") except that the fuel return to one of the tanks has an > additional 3 ft of -4 (1/4") aluminum tubing. The fuel pumps each move 4= 7 > gal/hr against a 7 psi head. > > > The fuel pressure in the rail is 38 psi when either pump is running. The > current draw from either pump is 6 amps. > > > When both pumps are running, the fuel pressure in the rail is 39.1 psi > when the tank without the additional 1/4" return tubing is selected and > 39.6 psi when the tank with the additional 1/4" return tubing is selected= . > The current draw from both pumps is 12 amps. > > > Since with my setup running both pumps only increases the pressure by > about 1 psi, and the 3 ft of 1/4" tubing only adds about 0.5 psi of back > pressure with both pumps running, it might be worth checking for a > restriction somewhere in your system. > > > Steve Boese > > > ------------------------------ > *From:* Rotary motors in aircraft on behalf > of steve Izett > *Sent:* Friday, March 17, 2017 3:44:46 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Fuel Pump and Regulator > > Hi Guys > > I fired up my secondary fuel pump for the first time today and was met > with what I didn=E2=80=99t expect. > Instead of seeing a blip in the fuel pressure, I had a 10psi increase and > high current draw from the pump which blew its 10amp fuse. > I=E2=80=99ll up the fuse as its too low me thinks. > > I used an old fuel regulator I had on a rail. It was of a Toyota 4AGE > engine of about 135hp. > Seems like its not able to bypass enough fuel with both pumps running. > > I think I need to install a higher power adjustable regulator. > What experience do you guys have with turning both pumps on simultaneousl= y? > > I=E2=80=99m putting a pressure switch in the circuit to turn on the backu= p pump if > the fuel pressure drops below a preset level. > > Appreciate your thoughts and experience. > > Steve Izett > Genesis 4 port EC3 EM3 RD1C in a Glasair Super II RG still nearly finishe= d! > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net: > 81/lists/flyrotary/List.html > --94eb2c18864ce27e3d054af31932 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hey Steve, not to hijack the thread, but which pump is tha= t? I can't find that # on the NAPA web site.

Thanks,=

Charlie
On Fri, Mar 17, 2017 at 12:34 PM, Steven W. Boe= se <flyrotary@lancaironline.net> wrote:

Steve,


I used a stock Mazda 1986 fuel pressure regulator, two NAPA 2P4028 fuel = pumps in parallel, and an Andair duplex fuel selector valve. The fuel lines= are -6 (3/8") except that the fuel return to one of the tanks has an = additional 3 ft of -4 (1/4") aluminum tubing.=C2=A0 The fuel pumps each move 47 gal/hr against a 7 psi head.


The fuel pressure in the rail is 38 psi when either pump is running.=C2= =A0 The current draw from either pump is 6 amps.


When both pumps are running, the fuel pressure in the rail is 39.1 psi w= hen the tank without the additional 1/4" return tubing is selected and= 39.6 psi when the tank with the additional 1/4" return tubing is sele= cted.=C2=A0 The current draw from both pumps is 12 amps.


Since with my setup running both pumps only increases the pressure by ab= out 1 psi, and the 3 ft of 1/4" tubing only adds about 0.5 psi of back= pressure with both pumps running, it might be worth checking for a restric= tion somewhere in your system.


Steve Boese


From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of stev= e Izett <flyrotary@lancaironline.net>
Sent: Friday, March 17, 2017 3:44:46 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Fuel Pump and Regulator
=C2=A0
Hi Guys

I fired up my secondary fuel pump for=C2=A0 the first time today and was me= t with what I didn=E2=80=99t expect.
Instead of seeing a blip in the fuel pressure, I had a 10psi increase and h= igh current draw from the pump which blew its 10amp fuse.
I=E2=80=99ll up the fuse as its too low me thinks.

I used an old fuel regulator I had on a rail. It was of a Toyota 4AGE engin= e of about 135hp.
Seems like its not able to bypass enough fuel with both pumps running.

I think I need to install a higher power adjustable regulator.
What experience do you guys have with turning both pumps on simultaneously?=

I=E2=80=99m putting a pressure switch in the circuit to turn on the backup = pump if the fuel pressure drops below a preset level.

Appreciate your thoughts and experience.

Steve Izett
Genesis 4 port EC3 EM3 RD1C in a Glasair Super II RG still nearly finished!=
--
Homepage:=C2=A0 htt= p://www.flyrotary.com/
Archive and UnSub:=C2=A0=C2=A0 http://mail.lancaironline.net:81/lists/flyrotary/List.html

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