Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 753624 for flyrotary@lancaironline.net; Mon, 21 Feb 2005 21:02:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=sqpilot@bellsouth.net Received: from [209.214.45.120] by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050222020114.VUSX2148.imf25aec.mail.bellsouth.net@[209.214.45.120]> for ; Mon, 21 Feb 2005 21:01:14 -0500 Received: from 127.0.0.1 (AVG SMTP 7.0.300 [266.1.0]); Mon, 21 Feb 2005 20:01:11 -0600 Message-ID: <00a501c51882$60da9500$132cd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: No more vapor lock Date: Mon, 21 Feb 2005 20:01:09 -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-421A926721ED=======" --=======AVGMAIL-421A926721ED======= Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A2_01C51850.16212B50" ------=_NextPart_000_00A2_01C51850.16212B50 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi, Kelly....I wish I had only made and tested one modification at a = time. I don't know for sure if it was bypassing of the Facet pump or = installing the vent in the sump tank that made the difference. I may = reconnect the Facet pump and try one more time to see if I can induce = vapor lock. My thinking is that I should have seen bubbles in the clear = fuel line that I used to bypass the Facet, trying to work their way back = to the main tanks. I could see nothing, unless they were so miniscule = that the naked eye could not see them. We did, however see movement of = air/bubbles from the top of the sump tank going into the main fuel tank. = Most of the time, the small amount of fuel in the newly installed sump = tank vent line just stayed about halfway between the sump tank and the = main tank. Under higher power loading, the fuel/bubbles would start = drifting uphill toward the main fuel tank.=20 Prior to installing the vent and bypassing the Facet pump, I could = easily and repeatedly induce vapor lock. If I either plug the sump or = reconnect the Facet, one of those should let me induce vapor lock again. = At least that's the assumption I am making, (and we all know about = making assumptions). I think that un-doing these mods one at a time = would be the most scientific method of finding out which one was = actually the cure. If you take both Excedrin and Aspirin for a = headache, it's difficult to know which one cured the headache. Paul = Conner ----- Original Message -----=20 From: Kelly Troyer=20 To: Rotary motors in aircraft=20 Sent: Monday, February 21, 2005 7:30 PM Subject: [FlyRotary] Re: No more vapor lock Paul, Does this mean the Facet fuel pump is history ?? -- Kelly Troyer=20 Dyke Delta/13B/RD1C/EC2=20 -------------- Original message from "Paul" : = --------------=20 Well, after several mods to my airplane, which include installing = firesleeve on all fuel lines, installing a vent for the sump tank (into = the main wing tank) and bypassing the Facet fuel pump with a short = length of clear tubing, I ran the engine until the water temp hit 230 = degrees. I shut it down and let the heat soaking proceed. Then I = restarted the engine and ran it up to 240 degrees. Still was able to go = to full power with no signs of the engine stumbling or running rough. = Finally, temps hit 250 and I could hear the surge tank spitting out = steam and liquid, but WOT was still smooth. Previously it would stumble = and quit by the time I hit 230. I taxiied back in and temps only came = down to around 220, so we placed the fan under the NACA scoop to cool it = down. There was evidence of small bubbles coming out of the top of the = aluminum sump tank (which remained cool to the touch even at 250 degrees = water temp), going into the left fuel strake. Itwas a small amount, but = nevertheless, it was evident that the vent was working. There was no = evidence of any bubbles coming out of the bottom of the surge tank and = trying to work their way back up towards the fuel selector valve = (through the line that the Facet pump normally resides). I ran it again = today, but just to normal 180 degree temps, and it still ran fine. Paul = Conner -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.1.0 - Release Date: 2/18/2005 ------=_NextPart_000_00A2_01C51850.16212B50 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Hi, Kelly....I wish I had only made and = tested one=20 modification at a time.  I don't know for sure if it was bypassing = of the=20 Facet pump or installing the vent in the sump tank that made the=20 difference.  I may reconnect the Facet pump and try one more time = to see if=20 I can induce vapor lock.  My thinking is that I should have seen = bubbles in=20 the clear fuel line that I used to bypass the Facet, trying to work = their way=20 back to the main tanks. I could see nothing, unless they were so = miniscule that=20 the naked eye could not see them. We did, however see movement of = air/bubbles=20 from the top of the sump tank going into the main fuel tank.  Most = of the=20 time, the small amount of fuel in the newly installed sump tank vent = line just=20 stayed about halfway between the sump tank and the main tank. Under = higher power=20 loading, the fuel/bubbles would start drifting uphill toward the main = fuel tank.=20
    Prior to installing = the vent and=20 bypassing the Facet pump, I could easily and repeatedly induce vapor = lock. =20 If I either plug the sump or reconnect the Facet, one of those should = let me=20 induce vapor lock again.  At least that's the assumption I am = making, (and=20 we all know about making assumptions).  I think that un-doing these = mods=20 one at a time would be the most scientific method of finding out which = one was=20 actually the cure.  If you take both Excedrin and Aspirin for a = headache,=20 it's difficult to know which one cured the headache. Paul = Conner
----- Original Message -----
From:=20 Kelly = Troyer
Sent: Monday, February 21, 2005 = 7:30=20 PM
Subject: [FlyRotary] Re: No = more vapor=20 lock

Paul,
    Does this mean the Facet fuel pump is history = ??
--
Kelly Troyer
Dyke=20 Delta/13B/RD1C/EC2




--------------=20 Original message from "Paul" <sqpilot@bellsouth.net>: = --------------

Well, after several mods to my = airplane, which=20 include installing firesleeve on all fuel lines, installing a vent = for the=20 sump tank (into the main wing tank) and bypassing the Facet fuel = pump with a=20 short length of clear tubing, I ran the engine until the water temp = hit 230=20 degrees.  I shut it down and let the heat soaking = proceed.  Then I=20 restarted the engine and ran it up to 240 degrees. Still was able to = go to=20 full power with no signs of the engine stumbling or running = rough. =20 Finally, temps hit 250 and I could hear the surge tank spitting out = steam=20 and liquid, but WOT was still smooth.  Previously it would = stumble and=20 quit by the time I hit 230.  I taxiied back in and temps only = came down=20 to around 220, so we placed the fan under the NACA scoop to cool it=20 down.  There was evidence of small bubbles coming out of the = top of the=20 aluminum sump tank (which remained cool to the touch even at 250 = degrees=20 water temp), going into the left fuel strake. Itwas a small amount, = but=20 nevertheless, it was evident that the vent was working. There was no = evidence of any bubbles coming out of the bottom of the surge tank = and=20 trying to work their way back up towards the fuel selector valve = (through=20 the line that the Facet pump normally resides).  I ran it again = today,=20 but just to normal 180 degree temps, and it still ran fine.  = Paul=20 Conner

No virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.300 / Virus Database: 266.1.0 - Release = Date:=20 2/18/2005
------=_NextPart_000_00A2_01C51850.16212B50-- --=======AVGMAIL-421A926721ED======= 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: 266.1.0 - Release Date: 2/18/2005 --=======AVGMAIL-421A926721ED=======--