Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3063467 for flyrotary@lancaironline.net; Thu, 04 Mar 2004 14:35:20 -0500 Received: from rad ([68.221.179.190]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040304193515.HOFM1901.imf23aec.mail.bellsouth.net@rad> for ; Thu, 4 Mar 2004 14:35:15 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Aluminum AN fittings - Safety (was Re: [FlyRotary] Re: ready to start? Date: Thu, 4 Mar 2004 13:35:18 -0600 Message-ID: <00e001c4021f$d3b14b70$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00E1_01C401ED.8916DB70" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_00E1_01C401ED.8916DB70 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Good point, David.... I was trying to use an aluminum fitting because = the casting is aluminum, and the female AN swivel hose fitting is aluminum, = so I was trying to avoid using dissimilar metals to prevent corrosion, etc. = Paul Conner =20 From going through all this with the RV-8, it's my understanding that = small fittings, say AN-6 and smaller should be steel if they attach to a hose = with relative motion. Larger fittings from AN-8 and up can remain aluminum, since they're pretty beefy. Again, that's just sort of a rule of thumb = that some folks use, so make your own decision about what you feel is safe. =20 =20 Cheers, Rusty (making one more run to the hanger for test fitting exhaust, then final weld tomorrow) =20 =20 ------=_NextPart_000_00E1_01C401ED.8916DB70 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Good point, David.... I was trying to use an aluminum = fitting=20 because the casting is aluminum, and the female AN swivel hose fitting = is=20 aluminum, so I was trying to avoid using dissimilar metals to prevent = corrosion,=20 etc.  Paul Conner

 
From = going through all=20 this with the RV-8, it's my understanding that small fittings, say AN-6 = and=20 smaller should be steel if they attach to a hose with relative = motion. =20 Larger fittings from AN-8 and up can remain aluminum, since they're = pretty=20 beefy.  Again, that's just sort of a rule of thumb that some folks = use, so=20 make your own decision about what you feel is safe.  =
 
Cheers,
Rusty=20 (making one more run to the hanger for test fitting exhaust, then final = weld=20 tomorrow)
 
 




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