Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Tue, 16 Dec 2003 14:31:04 -0500 Message-ID: X-Original-Return-Path: Received: from web.expresstel.net ([166.90.54.130] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2893248 for lml@lancaironline.net; Tue, 16 Dec 2003 12:13:38 -0500 Received: from RANDYSNAR ([216.20.239.206]) by web.expresstel.net (8.9.3/8.9.3) with SMTP id JAA02454 for ; Tue, 16 Dec 2003 09:13:06 -0800 From: "Randy Snarr" X-Original-To: "Lml" Subject: plenum to cowl connection X-Original-Date: Tue, 16 Dec 2003 10:30:07 -0700 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0037_01C3C3BF.93136EC0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0037_01C3C3BF.93136EC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I have built a glass plenum for my lancair 235/320. The problem is the connection from the plenum nozzles to the cowl openings. As you know there will be engine movement on the rubber insulators. The plenum that is secured to the cowl will need some relief where it connects to the cowl inlets. I currently have it set up with the cowl openings overlapping the outside of the plenum intakes with glass. It is a glass to glass connection. Gary Edwards in Medford did his that way at it appears to be working. I have the soft barry mounts and expect a little more engine shake at start up and shut down than gary probably has. I want to avoid fatigue and cracking on the front of my cowl, a cowl that I have spent significant time working on. What I am looking for is what other have done for this connection. I thought of using the orange silicone like rubber material to make some sort of seal. The problem with that is keeping the thin rubber material snug against the plenum and not sagging away from the plenum nozzles over time and leaving a gap instead of a reasonable seal. I would be interested if someone is aware of a material that could be bonded to the cowl overlapping the plenum intake nozzles that is flexible and has reasonably good memory properties and that would provide a snug connection to the cowl nozzles yet able to give when the engine shakes. It could be a hard material that is bendable or something that is stretchable like some kind of rubber or neoprene. Any suggestions would be greatly appreciated. Randy L. Snarr 235/320 70% now with an elec. MT 3 Blade propeller ... ------=_NextPart_000_0037_01C3C3BF.93136EC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I have = built a glass=20 plenum for my lancair 235/320.
The = problem is the=20 connection from the plenum nozzles to the cowl = openings.
As you = know=20 there will be engine movement on the rubber insulators. The=20 plenum that is secured to the cowl will need some relief where it = connects=20 to the cowl inlets.  I currently have it set up with the cowl = openings=20 overlapping the outside of the plenum intakes with glass. It is a glass = to glass=20 connection. Gary Edwards in Medford did his that way at it appears to be = working. I have the soft barry mounts and expect a little = more engine shake=20 at start up and shut down than gary probably has. I want to avoid = fatigue and=20 cracking on the front of my cowl, a cowl that I have spent significant = time=20 working on. What I am looking for is what other have done for this = connection. I=20 thought of using the orange silicone like rubber material to make some = sort of=20 seal. The problem with that is keeping the thin rubber material snug = against the=20 plenum and not sagging away from the plenum nozzles over time and = leaving a gap=20 instead of a reasonable seal. I would be interested if someone is = aware of=20 a material that could be bonded to the cowl overlapping the plenum = intake=20 nozzles that is flexible and has reasonably good memory properties = and that=20 would provide a snug connection to the cowl nozzles yet able to give = when the=20 engine shakes. It could be a hard material that is bendable = or something=20 that is stretchable like some kind of rubber or=20 neoprene.
 
Any = suggestions=20 would be greatly appreciated. 
 
Randy = L.=20 Snarr
235/320 70% now with=20 an elec. MT 3 Blade propeller ...
------=_NextPart_000_0037_01C3C3BF.93136EC0--