X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.52.245.18] (HELO ispwestemail2.mdeinc.com) by logan.com (CommuniGate Pro SMTP 4.3.3) with ESMTP id 970170 for flyrotary@lancaironline.net; Tue, 31 May 2005 08:28:03 -0400 Received-SPF: none receiver=logan.com; client-ip=216.52.245.18; envelope-from=wschertz@ispwest.com Received: from 7n7z201 (unverified [63.13.186.34]) by ispwestemail2.mdeinc.com (Vircom SMTPRS 4.1.361.20) with SMTP id for ; Tue, 31 May 2005 05:27:13 -0700 Message-ID: <022c01c565dc$0e7498e0$6401a8c0@7n7z201> From: "William" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: will EFI pumps pump air Date: Tue, 31 May 2005 07:27:05 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0229_01C565B2.254462F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0229_01C565B2.254462F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageHow does this give you redundancy? If either pump fails, you end = up without access to that tank's gas.=20 Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Greg@itmack=20 To: Rotary motors in aircraft=20 Sent: Tuesday, May 31, 2005 4:38 AM Subject: [FlyRotary] Re: will EFI pumps pump air I'm planning something similar for my RV8. Left or right fuel pump is = selected by change over switch so both can't be on at the same time and = when the left pump is switched on the normally open solenoid for the = right side is activated blocking the right return off and conversely the = left solenoid is activated when the right fuel pump is switched on. Perhaps some sought of change over solenoid can be used for the return = instead of the 2 solenoids. Attached is a plan of the basic layout. = Using this layout, I hope to avoid the complex plumbing for the Andair = fuel selector and I may be able to place the pumps in the wing root = area. Greg =20 I have separate tanks, pumps and filters on each side. Return is = switched by a solenoid energized by switching the left pump on. This = leads to its own set of fuel management issues, but it keeps the total = redundancy I was looking for. Since we're analyzing fuel systems, I'd = welcome any comments.=20 Where does the fuel return go when both pumps are on? Left tank I'm = guessing? Also guessing you turn that left pump off ASAP when climbing = out with full tanks :-) John (EM2 up and running. Checking EC2 wiring over & over)=20 Great to year you're running again! Rusty (weighing VW parts) -------------------------------------------------------------------------= ----- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0229_01C565B2.254462F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
How does this give you redundancy? If = either pump=20 fails, you end up without access to that tank's gas.
 
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Greg@itmack =
Sent: Tuesday, May 31, 2005 = 4:38 AM
Subject: [FlyRotary] Re: will = EFI pumps=20 pump air

I'm planning something similar for my = RV8. =20 Left or right fuel pump is selected by change over switch so both = can't be on=20 at the same time and when the left pump is switched on the = normally open=20 solenoid for the right side is activated blocking the right = return=20 off and conversely the left solenoid is activated when the right = fuel=20 pump is switched on.
 
Perhaps some sought of change over = solenoid can=20 be used for the return instead of the 2 solenoids.  Attached is a = plan of=20 the basic layout.  Using this layout, I hope to = avoid the=20 complex plumbing for the Andair fuel selector and I may be able = to place=20 the pumps in the wing root area.
 
Greg 
 
I have separate tanks, pumps and filters on each side. = Return is=20 switched by a solenoid energized by switching the left pump on. This = leads=20 to its own set of fuel management issues, but it keeps the total = redundancy=20 I was looking for. Since we're analyzing fuel systems, I'd welcome = any=20 comments. 
 
Where=20 does the fuel return go when both pumps are on?  Left tank I'm=20 guessing?  Also guessing you turn that left pump off ASAP when = climbing=20 out with full tanks :-)
 
John (EM2 up and running. Checking EC2 wiring over = &=20 over) 
 
Great=20 to year you're running = again!
 
Rusty=20 (weighing VW parts)
 
 

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
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