Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 800335 for flyrotary@lancaironline.net; Thu, 17 Mar 2005 09:37:50 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.115; envelope-from=keltro@att.net Received: from 204.127.135.40 ([204.127.135.40]) by worldnet.att.net (mtiwmhc11) with SMTP id <20050317143703111003crlre>; Thu, 17 Mar 2005 14:37:03 +0000 Received: from [209.247.222.111] by 204.127.135.40; Thu, 17 Mar 2005 14:37:03 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Returnless fuel systems Date: Thu, 17 Mar 2005 14:37:03 +0000 Message-Id: <031720051437.5215.4239960E000D3AA90000145F2160280748019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_5215_1111070223_0" --NextPart_Webmail_9m3u9jl4l_5215_1111070223_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Guys, Point of interest.......All the carburated Mazda's had a return system to bypass excess fuel to the tank !! Must have been a good reason...FWIW -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Ed Anderson" : -------------- > The answer is that they don't, Ernest. A carb system is just a susceptible > (if not more so) to troubles caused by excessive heat as fuel injected > systems. If you ever get the carb hot enough to start boiling the fuel in > the bowl you are in for a very interesting experience. I suspect that > perhaps the fuel vaporizing in the throat of the carb may draw a > considerably amount of heat from the carb keeping it cooler than you might > expect. But, there has been more than one carburated aircraft engine > stopping due to excessive heat in the fuel system. You have to take prudent > measure to shield your fuel system from excessive heat regardless of whether > Carb or injected. > > Ed A > > > ----- Original Message ----- > From: "Ernest Christley" > To: "Rotary motors in aircraft" > Sent: Wednesday, March 16, 2005 10:16 PM > Subject: [FlyRotary] Returnless fuel systems > > > > I'm not trying to beat this horse to death, but this question has been > > irritating me. > > > > We spent a lot of time discussing how the fuel that is firewall forward > > gets hot and boils, therefore, the fuel had to be routed someplace where > > it could cool. > > > > 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? --NextPart_Webmail_9m3u9jl4l_5215_1111070223_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Guys,
  Point of interest.......All the carburated Mazda's had a return system to
bypass excess fuel to the tank !! Must have been a good reason...FWIW
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from "Ed Anderson" <eanderson@carolina.rr.com>: --------------


> The answer is that they don't, Ernest. A carb system is just a susceptible
> (if not more so) to troubles caused by excessive heat as fuel injected
> systems. If you ever get the carb hot enough to start boiling the fuel in
> the bowl you are in for a very interesting experience. I suspect that
> perhaps the fuel vaporizing in the throat of the carb may draw a
> considerably amount of heat from the carb keeping it cooler than you might
> expect. But, there has been more than one carburated aircraft engine
> stopping due to excessive heat in the fuel system. You have to take prudent
> measure to shield your fuel system from excessive heat regardless of whether
> Carb or injected.
>
> Ed A
>
>
> ----- Original Message -----
> From: "Ernest Christley"
> To: "Rotary motors in aircraft"
> Sent: Wednesday, March 16, 2005 10:16 PM
> Subject: [FlyRotary] Returnless fuel systems
>
>
> > I'm not trying to beat this horse to death, but this question has been
> > irritating me.
> >
> > We spent a lot of time discussing how the fuel that is firewall forward
> > gets hot and boils, therefore, the fuel had to be routed someplace where
> > it could cool.
> >
> > 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?
--NextPart_Webmail_9m3u9jl4l_5215_1111070223_0--