Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 796974 for flyrotary@lancaironline.net; Wed, 16 Mar 2005 22:46:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050317034537.TOWY5764.imf19aec.mail.bellsouth.net@rd> for ; Wed, 16 Mar 2005 22:45:37 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Returnless fuel systems Date: Wed, 16 Mar 2005 21:43:48 -0600 Message-ID: <00f601c52aa3$86ee09b0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00F7_01C52A71.3C5399B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_00F7_01C52A71.3C5399B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit But what happens in carbuerated systems? There is a bowl there collecting and holding a 1/2 cup of fuel along with the delivery lines and the pumps only deliver a few pounds of pressure vs the 10's of pound in an injected systems. How do the carbs get away with it? Simple, they vent. The bowl is open to the atmosphere, so any vapor escapes. The only requirement is that the fuel pump be able to get enough liquid fuel into the bowl to keep the level correct. It can pump 90% air, and 10% fuel, as long as that 10% is enough to keep the bowl full. Cheers, Rusty (time for a chimichanga) ------=_NextPart_000_00F7_01C52A71.3C5399B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

But what happens in carbuerated systems?  There = is a bowl=20 there
collecting and holding a 1/2 cup of fuel along with the = delivery=20 lines
and the pumps only deliver a few pounds of pressure vs the 10's = of=20 pound
in an injected systems.  How do the carbs get away with=20 it?

 
Simple, = they vent. =20 The bowl is open to the atmosphere, so any vapor escapes.  The only = requirement is that the fuel pump be able to get enough liquid fuel into = the=20 bowl to keep the level correct.  It can pump 90% air, and 10% fuel, = as long=20 as that 10% is enough to keep the bowl full. 
 
Cheers,
Rusty = (time for a=20 chimichanga)



 ------=_NextPart_000_00F7_01C52A71.3C5399B0--