Return-Path: Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 753469 for flyrotary@lancaironline.net; Mon, 21 Feb 2005 18:49:36 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=sqpilot@bellsouth.net Received: from [209.214.44.19] by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050221234851.PGJX730.imf22aec.mail.bellsouth.net@[209.214.44.19]> for ; Mon, 21 Feb 2005 18:48:51 -0500 Received: from 127.0.0.1 (AVG SMTP 7.0.300 [266.1.0]); Mon, 21 Feb 2005 17:48:48 -0600 Message-ID: <008301c5186f$e22b1d40$132cd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" Subject: No more vapor lock Date: Mon, 21 Feb 2005 17:48:46 -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-421A7360570B=======" --=======AVGMAIL-421A7360570B======= Content-Type: multipart/alternative; boundary="----=_NextPart_000_0080_01C5183D.9771B390" ------=_NextPart_000_0080_01C5183D.9771B390 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable 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. It was 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 ------=_NextPart_000_0080_01C5183D.9771B390 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable

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

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