X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp.acd.net ([207.179.64.154] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1011360 for flyrotary@lancaironline.net; Thu, 23 Jun 2005 12:30:51 -0400 Received-SPF: none receiver=logan.com; client-ip=207.179.64.154; envelope-from=rjechtinaw@ia4u.net Received: from [207.179.77.30] ([207.179.77.30]) by smtp.acd.net with Microsoft SMTPSVC(5.0.2195.6713); Thu, 23 Jun 2005 12:27:45 -0400 Mime-Version: 1.0 (Apple Message framework v622) In-Reply-To: References: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Message-Id: <2abb6ecd744ec7213626456efb5231e5@ia4u.net> Content-Transfer-Encoding: quoted-printable From: randy echtinaw Subject: Re: [FlyRotary] Re: Thread "sealing" Date: Thu, 23 Jun 2005 12:32:52 -0400 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.622) Return-Path: rjechtinaw@ia4u.net X-OriginalArrivalTime: 23 Jun 2005 16:27:46.0623 (UTC) FILETIME=[7D423CF0:01C57810] Bill, I used two gear driven positive displacement coolant pumps on the two=20= V-8 powered SkyBolts I built. Both had screens at the entry to protect=20= the close tolerance pumps. I used "pipe dope" on the coolant fittings=20 throughout the system. Within 2 hours of engine startup the coolant had=20= leached the dope from the fittings and plugged the screens, pressure=20 built up and I had little jets of coolant spray everywhere. It may work=20= fine on the fuel system but I won't be using it again anywhere soon. FWIW Randy Sorry, I forgot - bottom post, bottom post, bottom post On Jun 23, 2005, at 11:47 AM, WRJJRS@aol.com wrote: > > In a message dated 6/23/2005 6:02:23 AM Pacific Standard Time,=20 > eanderson@carolina.rr.com writes: >> Hi Dave, >> >> Although it is officially a No-No, I have always used Teflon tape on=20= >> my >> large pipe thread ends.=A0 I am carefully to not wrap it so that tape=20= >> is not >> near the pointed end and is wrapped tight.=A0 I also found the = fitting >> "bottoming" out in the redrive casting as if made for a straight=20 >> rather than >> a tapered NPT.=A0 This not a recommendation to use Teflon tape - just = my >> experience has been OK. >> >> Ed AGroup, > =A0There are several brands of NPT pipe sealer that work great without=20= > the danger of breaking loose particles. Go to the gas piping section=20= > og your local hwd and you will find a teflon-enhanced liquid pipe=20 > sealer. It is a brush on paste that does eveything the tape does. Put=20= > it on a couple of threads up from the end. It seals great and there=20 > are no pieces to float down stream. This product is aften called "pipe=20= > dope". > Bill Jepson=