X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from mail02.syd.optusnet.com.au ([211.29.132.183] verified) by logan.com (CommuniGate Pro SMTP 5.1.5) with ESMTPS id 1788995 for flyrotary@lancaironline.net; Thu, 25 Jan 2007 02:10:33 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.183; envelope-from=lendich@optusnet.com.au Received: from george (d58-109-34-162.dsl.nsw.optusnet.com.au [58.109.34.162]) by mail02.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id l0P79bA0007667 for ; Thu, 25 Jan 2007 18:09:38 +1100 Message-ID: <002e01c7404f$c91a8160$a2226d3a@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Exhaust flange gaskets Date: Thu, 25 Jan 2007 17:09:40 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01C740A3.99A62D40" 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 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_002B_01C740A3.99A62D40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable My hangar mate races rotaries and his buddies and engine builders =20 started asking how to get this "magic" stuff. Aircraft Spruce is the =20 place. Send all royalty checks to my Paypal account, or I'll sue! Buly If your flanges are truly flat, you can use a 1/4" thick bead of 100% = GE silicone about 3/4" outboard of the port. Bolt on the header and = forget it. The silicone extrudes down to near zero thickness in service. It has never leaked. It is not exposed to = pressure even with a high flow muffler in place. The high velocity at = the port means low pressure. If the seal fails, air will leak into the = exhaust system and make a popping sound on closed throttle.=20 Works great. Lasts until you remove the headers again. Cheap. Lynn E. Hanover Lynn, Someone told me that Silicone destroys 02 sensors - is that true? George ( down under) ------=_NextPart_000_002B_01C740A3.99A62D40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

My hangar mate races rotaries and his buddies and engine = builders =20
started asking how to get this "magic" stuff. Aircraft Spruce = is=20 the
place.
Send all royalty checks to my Paypal account, or = I'll=20 sue!
Buly

If your flanges are truly flat, you can use a 1/4" thick bead of = 100% GE=20 silicone about 3/4" outboard of the port. Bolt on the header and = forget=20 it. The silicone extrudes down to near

zero thickness in service. It has never leaked. It is not exposed = to=20 pressure even with a high flow muffler in place. The high velocity at = the port=20 means low pressure. If the seal fails, air will leak into the exhaust = system=20 and make a popping sound on closed throttle.

Works great. Lasts until you remove the headers again. = Cheap.

Lynn E. Hanover

Lynn,

Someone told me that Silicone destroys 02 sensors - is that = true?

George ( down under)

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