X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx1.magmacom.com ([206.191.0.217] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTPS id 989518 for flyrotary@lancaironline.net; Wed, 08 Jun 2005 23:10:54 -0400 Received-SPF: none receiver=logan.com; client-ip=206.191.0.217; envelope-from=ianddsl@magma.ca Received: from mail4.magma.ca (mail4.magma.ca [206.191.0.222]) by mx1.magmacom.com (8.13.0/8.13.0) with ESMTP id j593A7Zt011565 for ; Wed, 8 Jun 2005 23:10:08 -0400 Received: from binky (ottawa-hs-64-26-156-111.s-ip.magma.ca [64.26.156.111]) by mail4.magma.ca (8.13.0/8.13.0) with SMTP id j593A5Ka016563 for ; Wed, 8 Jun 2005 23:10:07 -0400 Reply-To: From: "Ian Dewhirst" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: coolant leak Date: Wed, 8 Jun 2005 23:10:05 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01C56C7F.350B8140" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0018_01C56C7F.350B8140 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi David, I really really think that a cooling system that consumes coolant is leaking it somewhere, either venting water vapor to the atmosphere or leaking. I don't follow how your coolant level can be going down and yet you still have residual pressure, shouldn't the pressure drop to zero as the coolant is consumed over time? A rotary is unique in that depending on where an o-ring failure occurs relative to the intake port you can end up with a little problem or a big problem. As you rotate past the intake port the compression chamber pressure goes from 0 to over a hundred PSI, once the plug fires the pressure skyrockets due to combustion. -- Ian If I were getting combustion pressure in my cooling system I think I would be boiling off my coolant PDQ. But I find that it only drops very slowly, about like in my car. But now I understand how Ed discovered his problem. -- Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/vp4skydoc/index.html ------=_NextPart_000_0018_01C56C7F.350B8140 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi=20 David,

I=20 really really think that a cooling system that consumes coolant is = leaking=20 it somewhere, either venting water vapor to the atmosphere or=20 leaking. I don't follow how your coolant level can=20 be going down and yet you still have residual = pressure, shouldn't=20 the pressure drop to zero as the coolant is consumed over = time?

A=20 rotary is unique in that depending on where an o-ring failure = occurs=20 relative to the intake port you can end up with a little = problem or a=20 big problem. As you rotate past the intake port the = compression=20 chamber pressure goes from 0 to over a hundred PSI, once = the=20 plug fires the pressure skyrockets due to combustion. =

--=20 Ian

If I were getting combustion pressure in my cooling system I = think I=20 would be boiling off my coolant PDQ. But I find that it only = drops very=20 slowly, about like in my car.

But now I understand how Ed discovered his problem.

-- =
Dave=20 Leonard
Turbo Rotary RV-6 N4VY
http://memb= ers.aol.com/_ht_a/rotaryroster/index.html=20
http://members.aol.c= om/vp4skydoc/index.html=20

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