X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3889984 for flyrotary@lancaironline.net; Sun, 18 Oct 2009 11:45:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta03.mail.rr.com with ESMTP id <20091018154439785.ZRPU12700@cdptpa-omta03.mail.rr.com> for ; Sun, 18 Oct 2009 15:44:39 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: Returnless Fuel Systems Date: Sun, 18 Oct 2009 11:44:44 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01CA4FE8.63709510" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcpQCeos2gx0z6+NTXCm5o7SIdGJKg== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20091018154439785.ZRPU12700@cdptpa-omta03.mail.rr.com> This is a multi-part message in MIME format. ------=_NextPart_000_0004_01CA4FE8.63709510 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I thought some of you in the early stages of designing your fuel system might be interested in this article on =93Returnless=94 fuel system. I = have one that approaches it in concept in that no fuel is returned to a fuel tank (but, I do cheat a bit with a =BD pint header tank on the FW that the = injector unused fuel is returned to- but it approaches the mechanical type = mentioned in the extract below). But, in any case, I thought the article might be = of interest =20 Ed =20 Actually, there are two different types of returnless EFI systems in = use: mechanical and electronic. In the mechanical systems, a mechanical = regulator is mounted on the fuel pump module to provide a more or less constant = fuel pressure to the engine. This type of setup works well with a = speed-density EFI system that uses throttle position, intake manifold pressure and = engine rpm to determine engine load rather than an airflow sensor. =20 =20 http://www.underhoodservice.com/Article/46468/Point_of_N.aspx =20 =20 =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm =20 =20 ------=_NextPart_000_0004_01CA4FE8.63709510 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I thought some of you in the early stages of = designing your fuel system might be interested in this article on = “Returnless” fuel system.=A0 I have one that approaches it in concept in that no fuel = is returned to a fuel tank (but, I do cheat a bit with a =BD pint header = tank on the FW that the injector unused fuel is returned to- but it approaches the mechanical type mentioned in the extract below).=A0 But, in any case, I = thought the article might be of interest

 

Ed

 

Actually, there are two different types of = returnless EFI systems in use: mechanical and electronic. In the mechanical systems, a mechanical regulator is mounted on the fuel pump module to provide a = more or less constant fuel pressure to the engine. This type of setup works well = with a speed-density EFI system that uses throttle position, intake manifold = pressure and engine rpm to determine engine load rather than an airflow = sensor.

 

 

ht= tp://www.underhoodservice.com/Article/46468/Point_of_N.aspx

 

 

 

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.r= otaryaviation.com/Rotorhead%20Truth.htm

 



__________ Information from ESET NOD32 Antivirus, version of = virus signature database 3267 (20080714) __________

The message = was checked by ESET NOD32 Antivirus.

http://www.eset.com
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