X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1873700 for flyrotary@lancaironline.net; Wed, 28 Feb 2007 09:11:36 -0500 Received-SPF: none receiver=logan.com; client-ip=205.152.59.65; envelope-from=rusty@radrotary.com Received: from ibm57aec.bellsouth.net ([65.6.194.9]) by imf17aec.mail.bellsouth.net with ESMTP id <20070228141029.RKWQ27637.imf17aec.mail.bellsouth.net@ibm57aec.bellsouth.net> for ; Wed, 28 Feb 2007 09:10:29 -0500 Received: from rd ([65.6.194.9]) by ibm57aec.bellsouth.net with ESMTP id <20070228141029.UVMJ21119.ibm57aec.bellsouth.net@rd> for ; Wed, 28 Feb 2007 09:10:29 -0500 From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: engine mount 4130 vs 304 SS Date: Wed, 28 Feb 2007 08:10:25 -0600 Message-ID: <000001c75b42$33de3c00$6e01a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C75B0F.E943CC00" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6822 Importance: Normal Thread-Index: AcdbQjBRL/GWxgRITC+jgokkTSCExQ== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C75B0F.E943CC00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Greetings, =20 As I ponder my choices for mounting the single rotor engine, I noticed something that surprised me. 304 stainless is cheaper than 4130 steel. = One thing that's always bothered me about steel tube type construction is = the concern for rusting inside the tubes, so stainless is appealing. There = must be a catch here. =20 =20 Is there a good reason I should use 4130 instead of 304? Either will = likely be sized much larger than needed, since I don't have the means to do any proper analysis of the strength. =20 =20 Thanks, Rusty (Autoflight drive supposed to be shipping next week) ------=_NextPart_000_0001_01C75B0F.E943CC00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 
As I ponder my = choices for=20 mounting the single rotor engine, I noticed something that surprised = me. =20 304 stainless is cheaper than 4130 steel.  One thing that's always = bothered=20 me about steel tube type construction is the concern for rusting inside = the=20 tubes, so stainless is appealing.  There must be a catch = here. =20
 
Is there a good = reason I=20 should use 4130 instead of 304?  Either will likely be sized much = larger=20 than needed, since I don't have the means to do any proper analysis of = the=20 strength. 
 
Thanks,
Rusty = (Autoflight drive=20 supposed to be shipping next week)
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