Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP id 729460 for flyrotary@lancaironline.net; Tue, 15 Feb 2005 07:42:21 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=sqpilot@bellsouth.net Received: from [209.214.44.108] by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050215124133.QEAY2148.imf25aec.mail.bellsouth.net@[209.214.44.108]> for ; Tue, 15 Feb 2005 07:41:33 -0500 Received: from 127.0.0.1 (AVG SMTP 7.0.300 [265.8.7]); Tue, 15 Feb 2005 06:41:28 -0600 Message-ID: <00ac01c5135b$aa108c10$6c2cd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Bad day at the airport Date: Tue, 15 Feb 2005 06:41:26 -0600 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=======AVGMAIL-4211EDF8682F=======" --=======AVGMAIL-4211EDF8682F======= Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A9_01C51329.5F54B160" ------=_NextPart_000_00A9_01C51329.5F54B160 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi, Mark....that seems to be the general consensus, and I agree that it = is the most likely cause of the fuel starvation. I ran the aircraft = several times yesterday, and it still ran as smooth as ever. I tried a = couple of aborted takeoffs, and it still ran great. Good acceleration, = nosewheel off the ground by 1200 feet. Unfortunately, until I vent the = sump tank and install firesleeving on my fuel lines, the nosewheel is = the only part of the plane that is going to leave the ground. Will keep = you posted. Thanks again for your input. Paul Conner, off to the = welder ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Monday, February 14, 2005 10:09 AM Subject: [FlyRotary] Re: Bad day at the airport =20 Paul, It looks like the group has focused in on the fuel system, or more = specifically the sump tank as the likely culprit. I suspected you might = have been running mogas. Its my understanding that auto fuel has a much = lower vapor pressure than avgas and is therefore more likely to vapor = lock. =20 =20 Just a SWAG, but I think the engine and related systems got hot enough = to heat the fuel in the fuel rails so that once it passed the pressure = regulator (pressure drop) it started to boil, similar to when you open a = hot soda. With the return fuel going to an unvented tank, the boiling = fuel expanded enough to cause pressure in the header tank so as to = prevent fresh fuel from flowing into the tank. Eventually, the header = tank ran dry and the engine quit. You sure handled the situation like a = pro. Hope I never have to face that scenario. =20 Mark S.=20 =20 =20 =20 Hi, Mark...my humblest appologies for taking so long to respond. I am = whittling down the 200 plus messages in my inbox. I was using auto fuel = (regular). I have a fuel return line and it goes to the top of my = aluminum sump tank that is located on the cool side of the firewall = (inside the cabin, behind the rear seat). The return line is -8 in size. = Hope this helps. Paul Conner -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 2/10/2005 ------=_NextPart_000_00A9_01C51329.5F54B160 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable

Hi, Mark....that seems to be the = general consensus,=20 and I agree that it is the most likely cause of the fuel = starvation. I ran=20 the aircraft several times yesterday, and it still ran as smooth as = ever. =20 I tried a couple of aborted takeoffs, and it still ran great. Good = acceleration,=20 nosewheel off the ground by 1200 feet. Unfortunately, until I vent = the=20 sump tank and install firesleeving on my fuel lines, the nosewheel is = the only=20 part of the plane that is going to leave the ground. Will keep you = posted. Thanks again for your input. Paul Conner, off to the = welder

----- Original Message -----

From:=20 Mark R Steitle =

To: Rotary motors in = aircraft

Sent: Monday, February 14, 2005 = 10:09=20 AM

Subject: [FlyRotary] Re: Bad = day at the=20 airport

Paul,

It looks = like the=20 group has focused in on the fuel system, or more specifically the sump = tank as=20 the likely culprit. I suspected you might have been running = mogas.=20 Its my understanding that auto fuel has a much lower vapor = pressure than=20 avgas and is therefore more likely to vapor lock. =20

Just a = SWAG, but I=20 think the engine and related systems got hot enough to heat the fuel = in the=20 fuel rails so that once it passed the pressure regulator (pressure = drop) it=20 started to boil, similar to when you open a hot soda. With the = return=20 fuel going to an unvented tank, the boiling fuel expanded enough to = cause=20 pressure in the header tank so as to prevent fresh fuel from flowing = into the=20 tank. Eventually, the header tank ran dry and the engine = quit. You=20 sure handled the situation like a pro. Hope I never have to face = that=20 scenario.

Mark S.=20

=20

Hi, Mark...my humblest = appologies=20 for taking so long to respond. I am whittling down the 200 plus = messages=20 in my inbox. I was using auto fuel (regular). I have a fuel = return line=20 and it goes to the top of my aluminum sump tank that is located on the = cool=20 side of the firewall (inside the cabin, behind the rear seat). The = return line=20 is -8 in size. Hope this helps. Paul=20 Conner

No virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.300 / Virus Database: 265.8.7 - Release = Date:=20 2/10/2005
------=_NextPart_000_00A9_01C51329.5F54B160-- --=======AVGMAIL-4211EDF8682F======= Content-Type: text/plain; x-avg=cert; charset=us-ascii Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Content-Description: "AVG certification" No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.7 - Release Date: 2/10/2005 --=======AVGMAIL-4211EDF8682F=======--