X-Virus-Scanned: clean according to Sophos on Logan.com X-Junk-Score: 2 [X] X-SpamCatcher-Score: 2 [X] Return-Path: Received: from qmta01.emeryville.ca.mail.comcast.net ([76.96.30.16] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6001761 for flyrotary@lancaironline.net; Tue, 08 Jan 2013 18:21:51 -0500 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.16; envelope-from=randolph7714@comcast.net Received: from omta16.emeryville.ca.mail.comcast.net ([76.96.30.72]) by qmta01.emeryville.ca.mail.comcast.net with comcast id lRXp1k0061ZMdJ4A1bMG5j; Tue, 08 Jan 2013 23:21:16 +0000 Received: from RandySmithPC ([98.197.43.49]) by omta16.emeryville.ca.mail.comcast.net with comcast id lbME1k00X13fDNi8cbMFX3; Tue, 08 Jan 2013 23:21:15 +0000 From: "Randolph" To: "'William Mason'" , "Rotary motors in aircraft" In-Reply-To: Subject: RE: your intake and exhaust manifold Date: Tue, 8 Jan 2013 17:21:17 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00BB_01CDEDC4.9211B7A0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 thread-index: Ac3sjCEw5mS7hzeiTdGRWz3g1Ik5XwBaN4Ig DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1357687276; bh=ApWPpxChN2U5wHGMQF4DoVuVFVaqwFKhwzAF/u1xOVI=; h=Received:Received:From:To:Subject:Date:MIME-Version:Content-Type; b=MrgF7Rc5xEGFkhT8aRk+mkdtfReHo8Xx21HY7F/mB54d+dsQ6Gi12ihT7m0oCXQ4g k/xU4YDvSHU2vr9kTykEzDTpqVlvhYmIDUdLW+jvN/B3Y5flsdctbfbQeT9dJdQDmp Bf3FWPmLOBFeqqpPi/P+o1+fa3Rpun9UaifdITcbSfYBvB95L91AtoE8YjaZduBqrc bWHmWOcOkEW2FUV85K4qT+sgwZlxrAjjSxGZ4PCNKk+Oxl6LM3/giVvSYJ9KK0bavM jdPku3Win0yp4PaBbzE7H4pM5JG451s6VniDIODIhZISssLn3saZCP5aBUvCUHULFh vlORgay4W9XaA== Message-ID: This is a multi-part message in MIME format. ------=_NextPart_000_00BB_01CDEDC4.9211B7A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Thanks, Bill I have some of the same concerns you have expressed! I'll be watching that exhaust closely as it should crack sooner perhaps before later. The tubes welded directly to those thin exhaust flanges (308 type) are inconel 718, same strength at 1650 degrees as mild steel at room temperature and welded using TIG and Haynes alloy 214 as I remember (4 1/2 % aluminum Ni base alloy). Weather they provide enough restraint to keep the thin flanges flat against the engine...we will see. I am anxious to get airborn to experience my own "hiccups" so prevalent in the comments. Regards Randy _____ From: William Mason [mailto:instructorbill@msn.com] Sent: Sunday, January 06, 2013 10:05 PM To: randolph7714@comcast.net Subject: your intake and exhaust manifold I thought I might send you a little side note, not on the list. the intake manifold looks nice, I would though hope that the exhaust manifold will be getting some of the same attention. It seems that the exhaust flange is quite thin. Due to the stresses and temperatures that it will see, even if built in inconel, at that thickness it will likely crack, split, leak, warp, etc You certainly are ahead of me at this point, but you may seek the advice of the group about that exhaust flange. Please take this constructively. Regards Bill Mason __________ Information from ESET NOD32 Antivirus, version of virus signature database 7873 (20130108) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_00BB_01CDEDC4.9211B7A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Thanks, Bill

I have some of the same concerns you have expressed! = I'll be=20 watching that exhaust closely as it should crack sooner perhaps = before=20 later. The tubes welded directly to those thin exhaust = flanges (308=20 type) are inconel 718, same strength at 1650 degrees as mild steel at = room=20 temperature and welded using TIG and Haynes alloy 214 as I remember (4 = 1/2 %=20 aluminum Ni base alloy). Weather they provide enough restraint to = keep the=20 thin flanges flat against the engine...we will see. I am anxious = to get=20 airborn to experience my own "hiccups" so prevalent in the=20 comments.

Regards

Randy

From: William Mason = [mailto:instructorbill@msn.com]=20
Sent: Sunday, January 06, 2013 10:05 PM
To:=20 randolph7714@comcast.net
Subject: your intake and exhaust=20 manifold

I thought I might send you a little side note, not on the = list.=20

the intake manifold looks nice, I would though hope = that the=20 exhaust manifold will be getting some of the same = attention.

It seems=20 that the exhaust flange is quite thin. Due to the stresses and=20 temperatures that it will see, even if built in inconel, at that = thickness it=20 will likely crack, split, leak, warp, etc

You certainly are = ahead of=20 me at this point, but you may seek the advice of the group about that = exhaust=20 flange.

Please take this = constructively.

Regards
Bill=20 Mason

__________ Information from ESET NOD32 Antivirus, = version=20 of virus signature database 7873 (20130108) __________

The = message was=20 checked by ESET NOD32 Antivirus.

http://www.eset.com
=

__________ Information from ESET NOD32 Antivirus, version of = virus signature database 7873 (20130108) __________

The message = was checked by ESET NOD32 Antivirus.

http://www.eset.com
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