Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Thu, 13 Mar 2003 19:09:41 -0500 Message-ID: X-Original-Return-Path: <13brv3@mchsi.com> Received: from sccmmhc01.mchsi.com ([204.127.203.183] verified) by logan.com (CommuniGate Pro SMTP 4.0.6) with ESMTP id 2051406 for flyrotary@lancaironline.net; Thu, 13 Mar 2003 09:30:33 -0500 Received: from rad ([12.218.74.116]) by sccmmhc01.mchsi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20030313143007.FRID22382.sccmmhc01.mchsi.com@rad> for ; Thu, 13 Mar 2003 14:30:07 +0000 Reply-To: <13brv3@mchsi.com> From: <13brv3@mchsi.com> X-Original-To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Fuel Injection X-Original-Date: Thu, 13 Mar 2003 08:29:53 -0600 X-Original-Message-ID: <000001c2e96d$06dc8ea0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C2E93A.BC421EA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C2E93A.BC421EA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable My TWM throttle body I purchased from Dave Atkins has two = injectors already installed on the throttle body. It also has the fuel rail, and I have still in the box, the fuel pressure requlator. I assume that my = fuel flow will go from the tank, through the fuel tank selector valve to the = fuel pump, then through the pressure regulator, to the injectors. My = question is.....do I need to allow a return to the fuel tank for unused or excess fuel? If so, do I take it from the fuel rail opposite the pressure requlator? I am, unfortunately, a complete layman when it comes to fuel injection, so please be gentle on me. =20 =20 Here's my understanding of it. Someone correct me if I'm wrong. Fuel injection would be plumbed as follows: tank - selector - filter = somewhere before the pump usually - fuel pump - one end of the fuel rail - the = other end of the fuel rail goes to the input of the regulator - the output of = the regulator is return fuel that goes back to the tank. =20 =20 =20 I noted that on the injectors that came with my engine, that the = injectors have a small tube protuding 90 degrees from the injector, which I assume = was for the purpose of returning fuel to the tank? =20 =20 Can you post a picture of this tube? I'm not sure what that would be.=20 =20 The rotary scene is getting pretty interesting in our little part of the world isn't it? We should have 3 new rotary aircraft flying by the end = of the year, and all within less than a 100 mile radius :-) =20 Cheers, Rusty =20 ------=_NextPart_000_0001_01C2E93A.BC421EA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
      My = TWM=20 throttle body I purchased from Dave Atkins has two injectors already = installed=20 on the throttle body. It also has the fuel rail, and I have still in the = box,=20 the fuel pressure requlator. I assume that my fuel flow will go = from the=20 tank, through the fuel tank selector valve to the fuel pump, then = through the=20 pressure regulator, to the injectors.  My question is.....do I need = to=20 allow a return to the fuel tank for unused or excess fuel?  If so, = do I=20 take it from the fuel rail opposite the pressure requlator? I am, = unfortunately,=20 a complete layman when it comes to fuel injection, so please be gentle = on=20 me.  
 
Here's my understanding of it.  Someone = correct me=20 if I'm wrong.    Fuel injection would be plumbed as=20 follows:  tank - selector - filter somewhere before the pump = usually - fuel=20 pump - one end of the fuel rail - the other end of the fuel rail goes to = the=20 input of the regulator - the output of the regulator is return fuel that = goes=20 back to the tank. 
 
 
 I=20 noted that on the injectors that came with my engine, that the injectors = have a=20 small tube protuding 90 degrees from the injector, which I assume was = for the=20 purpose of returning fuel to the tank?   
 
Can you post a picture of this tube?  I'm = not sure=20 what that would be. 
 
The rotary scene is getting pretty = interesting in our=20 little part of the world isn't it?  We should have 3 new rotary = aircraft=20 flying by the end of the year, and all within less than a 100 mile = radius=20 :-)
 
Cheers,
Rusty
 
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