X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [199.185.220.224] (HELO priv-edtnes40.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1002886 for flyrotary@lancaironline.net; Wed, 15 Jun 2005 11:12:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=199.185.220.224; envelope-from=echolakeresort@telus.net Received: from boucher-oddle24 ([207.194.127.104]) by priv-edtnes40.telusplanet.net (InterMail vM.6.01.04.04 201-2131-118-104-20050224) with SMTP id <20050615151146.GQJF15288.priv-edtnes40.telusplanet.net@boucher-oddle24> for ; Wed, 15 Jun 2005 09:11:46 -0600 MIME-Version: 1.0 Message-Id: <42B0452E.000005.03040@BOUCHER-ODDLE24> Date: Wed, 15 Jun 2005 08:11:42 -0700 (Pacific Standard Time) Content-Type: Multipart/Alternative; boundary="------------Boundary-00=_IVS46RO0000000000000" X-Mailer: IncrediMail (3001609) From: "Echo Lake Fishing Resort (Georges Boucher)" References: To: Subject: Re: [FlyRotary] EFI Bleeder Circuit (Was Engine Not Starting) X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 --------------Boundary-00=_IVS46RO0000000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It makes sense to have the "bleed" line be located as close to the inject= ors but difference in the time that it would take to clear the air out of t= he system would be minimal after the pump is air free. ( the "T" for the ret= urn line should point UP).=0D Georges B.=0D -------Original Message-------=0D =0D From: Rotary motors in aircraft=0D Date: 06/15/05 07:13:58=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] EFI Bleeder Circuit (Was Engine Not Starting)=0D =0D Jofar,=0D The real purpose of the bleed circuit is to allow the pump to reprime=0D itself. Once that happens, the pump builds up pressure again, and=0D forces all the remaining air out through the pressure regulator. With a=0D 5-gal tank sitting on the floor, my system (running one pump) can=0D reprime itself in about 10 seconds. Yes, under the right circumstances,=0D that could be the longest 10 seconds of my life. This should only=0D happen if you run a tank dry. But if that happens, the procedure will=0D be to switch to the other tank (should have fuel), then turn on the=0D boost pump. That should reduce the recovery time to something less than=0D 10 seconds.=0D =0D Mark=0D =0D -----Original Message-----=0D From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On=0D Behalf Of jesse farr=0D Sent: Wednesday, June 15, 2005 8:47 AM=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] Re: Engine Not Starting=0D =0D I don't know nothing (actually pretty much anything) about any of this=0D but=0D that has never stopped me from having and voicing an opinion; so, if=0D injectors only fire small percentage of time and fuel & compressed air=0D flow=0D not sufficient at times to clear out in time to get started while flying=0D ac,=0D bleed return definitly sounds like good idea. But, if sufficiently far=0D away=0D from injectors, then even though now have flow established to the bleed=0D point, you will still have slow go to purge remaining compressed air,=0D vapor=0D and allow fuel to actually flow from there to injectors and inject. It=0D may=0D just take a few seconds longer but that is still a tight a-- time of=0D flying,=0D starting, praying, cursing own stupidity, etc.. Could I suggest might be=0D =0D better to put bleed point at end of fuel rail so as to pass vapor all=0D the=0D way more quickly ? After all, small orfice and line return to tank=0D shouldn't=0D create that much more of a problem. Is there some other problem there=0D that I=0D simply do not know enough to understand ?=0D jofarr, soddy tn=0D =0D >> Homepage: http://www.flyrotary.com/=0D >> Archive: http://lancaironline.net/lists/flyrotary/List.html --------------Boundary-00=_IVS46RO0000000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
It makes sense to have the "bleed" line be located as close to = the injectors, but difference in the time that it would  take t= o clear the air out of the system would be minimal after the pump is air = free. ( the "T" for the return line should point UP).
 Georges B.
-------Original Message-------
 
Date: 06/15/05 07:= 13:58
Subject: [FlyRotar= y] EFI Bleeder Circuit (Was Engine Not Starting)
 
Jofar,
The real purpose of the bleed circuit is to allow the pump to reprim= e
itself.  Once that happens, the pump builds up pressure ag= ain, and
forces all the remaining air out through the pressure regulator.&nbs= p; With a
5-gal tank sitting on the floor, my system (running one pump) can
reprime itself in about 10 seconds.  Yes, under the right = circumstances,
that could be the longest 10 seconds of my life.  This sho= uld only
happen if you run a tank dry.  But if that happens, the pr= ocedure will
be to switch to the other tank (should have fuel), then turn on the<= /DIV>
boost pump.  That should reduce the recovery time to somet= hing less than
10 seconds.
 
Mark
 
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of jesse farr
Sent: Wednesday, June 15, 2005 8:47 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Engine Not Starting
 
I don't know nothing (actually pretty much anything) about any of th= is
but
that has never stopped me from having and voicing an opinion; so, if=
injectors only fire small percentage of time and fuel & compress= ed air
flow
not sufficient at times to clear out in time to get started while fl= ying
ac,
bleed return definitly sounds like good idea. But, if sufficiently f= ar
away
from injectors, then even though now have flow established to the bl= eed
point, you will still have slow go to purge remaining compressed air= ,
vapor
and allow fuel to actually flow from there to injectors and inject. = It
may
just take a few seconds longer but that is still a tight a-- time of=
flying,
starting, praying, cursing own stupidity, etc.. Could I suggest migh= t be
 
better to put bleed point at end of fuel rail so as to pass vapor al= l
the
way more quickly ? After all, small orfice and line return to tank
shouldn't
create that much more of a problem. Is there some other problem ther= e
that I
simply do not know enough to understand ?
jofarr, soddy tn
 
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