X-Virus-Scanned: clean according to Sophos on Logan.com From: "Stephen Izett" Received: from mail-pd0-f181.google.com ([209.85.192.181] verified) by logan.com (CommuniGate Pro SMTP 6.0.10) with ESMTPS id 7239085 for flyrotary@lancaironline.net; Mon, 27 Oct 2014 18:39:20 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.181; envelope-from=steveize@gmail.com Received: by mail-pd0-f181.google.com with SMTP id y10so2132036pdj.26 for ; Mon, 27 Oct 2014 15:38:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:message-id:mime-version:subject:date:references :to:in-reply-to; bh=4kmkDf0G+CBnjaO8dJrbjly7vxNmO03eW3bD5l3lH64=; b=mK6NExOzsmC8euu2Dr3HX0BIv1Rqw2BGjXfcsLF0eBpWkCj+xnhC40cxsXb7DvQNQ2 lttW7uhm/UdbyryrU9QnpkX0175gEfLyJbJtUQVyuodYb5CT3rcfnsGekg1gcq5B459Q oAglksI51S6Bq11K8xZfolrYpcfcu4DvGQwVsg3JJXn8yt5dJTnGWwWZQe+g4RO+ID/E e+vGsQVPIbtYnpnAx+YFJ1hBFZhPXRJMTI63hHJB2iNP2au5gx9bD8rifW+jmQZ8CC2p 2sL9P1+vIXryfn2Mx5awEiCghBaOd2OWV5/S5cK5XuQfnFPpIV9xOqpKgXpCwesVBBpc lH9w== X-Received: by 10.66.228.35 with SMTP id sf3mr26872023pac.110.1414449526473; Mon, 27 Oct 2014 15:38:46 -0700 (PDT) Return-Path: Received: from [10.1.1.12] (106-69-41-211.dyn.iinet.net.au. [106.69.41.211]) by mx.google.com with ESMTPSA id pc2sm11733319pbb.85.2014.10.27.15.38.43 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 27 Oct 2014 15:38:45 -0700 (PDT) X-Google-Original-From: Stephen Izett Content-Type: multipart/alternative; boundary="Apple-Mail=_10D95534-7803-4F77-940F-EBF31B36FE45" Message-Id: <1271C21F-67D5-47C2-9B0F-EFF87E52259E@icloud.com> Mime-Version: 1.0 (Mac OS X Mail 8.0 \(1990.1\)) Subject: Re: [FlyRotary] Re: electric fuel selector valves Date: Tue, 28 Oct 2014 06:38:40 +0800 References: To: Rotary motors in aircraft In-Reply-To: X-Mailer: Apple Mail (2.1990.1) --Apple-Mail=_10D95534-7803-4F77-940F-EBF31B36FE45 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Saro is right. I have a six port polak. I think varying the polarity to the main = solenoid positions the valve seals one way or the other. Internal switches de-energise the solenoid and provide feedback of = selected ports. I chose not to use it in the end opting for a more fail safe setup. Steve Izett > On 28 Oct 2014, at 5:55 am, Ernest Christley = wrote: >=20 > This is the type that I'm referring to: >=20 > = http://products.pollakaftermarket.com/item/fuel-selector-valves/light-truc= k-6-port-motor-driven-valve/42-302 = >=20 >=20 > On Monday, October 27, 2014 5:50 PM, Ernest Christley = wrote: >=20 >=20 > Is anyone familiar with electric fuel selector valves as used in = automotive applications. I'm trying to figure out how they operate. Do = they select one line when power is applied to a solenoid type plunger, = and then the other line is selected when power isn't applied? Or does a = pulse of power switch them back and forth? If they maintain the = currently selected tank when power is absent, it seems to me that this = could remove fuel lines and a leak prone selector valve from a lot of = cockpits. Furthermore, the 6 port models look like they could be = plumbed easily to handle return lines.=20 >=20 >=20 >=20 --Apple-Mail=_10D95534-7803-4F77-940F-EBF31B36FE45 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Saro is right.
I have a six port polak. I = think varying the polarity to the main solenoid positions the valve = seals one way or the other.
Internal switches = de-energise the solenoid and provide feedback of selected = ports.
I chose not to use it in the end opting for = a more fail safe setup.

Steve Izett
On 28 Oct 2014, at 5:55 am, Ernest Christley = <flyrotary@lancaironline.net> wrote:

This is the type that I'm referring to:

http://products.pollakaftermar= ket.com/item/fuel-selector-valves/light-truck-6-port-motor-driven-valve/42= -302


On = Monday, October 27, 2014 5:50 PM, Ernest Christley <flyrotary@lancaironline.net> wrote:


Is anyone = familiar with electric fuel selector valves as used in=20 automotive applications.  I'm trying to figure out how they = operate.  Do they select one line when power is applied to a solenoid type plunger,=20= and then the other line is selected when power isn't applied?  Or = does a pulse of power switch them back and forth?  If they maintain the=20= currently selected tank when power is absent, it seems to me that this=20= could remove fuel lines and a leak prone selector valve from a lot of=20 cockpits.  Furthermore, the 6 port models look like they could be=20= plumbed easily to handle return lines.



=

= --Apple-Mail=_10D95534-7803-4F77-940F-EBF31B36FE45--