Return-Path: <13brv3@bellsouth.net> Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 620481 for flyrotary@lancaironline.net; Mon, 24 Jan 2005 22:08:42 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050125030811.JRJZ1992.imf17aec.mail.bellsouth.net@rd> for ; Mon, 24 Jan 2005 22:08:11 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: oil analysis results (140k attachment) Date: Mon, 24 Jan 2005 21:08:40 -0600 Message-ID: <028301c5028b$2ba85910$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0284_01C50258.E10DE910" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0284_01C50258.E10DE910 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Well, from the photos of the engine you showed, it looked like a lot of metal got blued, rubber got burnt, and seat cushions dimpled - but, apparently it had not progressed to the point of grinding metal off = parts of the engine - or else you have one dandy oil filter that capture them = all. Hi Ed, =20 =20 It went way beyond blued. I'd need to measure it, but it looks like the thrust surface on one side of the rotor was worn down flush with the = rest of the rotor side. The side itself is also severely ground. Make no = mistake, the "ground metal" flag is set to 1 :-) =20 =20 The oil I sent them was the last 8 ounces or so that was in the bottom = of the pan, which is poor practice in itself, but it's all I had. The oil pickup couldn't reach it, so I doubt this is a case of the filter = catching it all, though it's a better explanation than I have. =20 =20 I believe that routine oil analysis can probably be of some value as far = as trends might go, but I'm extremely under whelmed by the results of this test. It just seems to me that something should have been screaming "damage", but clearly it isn't. =20 =20 Cheers, Rusty (maybe my rotors were calcium coated) ------=_NextPart_000_0284_01C50258.E10DE910 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

Well, from the photos of the engine you showed,  = it looked=20 like a lot of metal got blued, rubber got burnt, and seat cushions = dimpled -=20 but, apparently it had not progressed to the point of grinding metal off = parts=20 of the engine - or else you have one dandy oil filter that capture them=20 all.

Hi = Ed, =20
 
It went = way beyond=20 blued.  I'd need to measure it, but it looks like the thrust = surface on one=20 side of the rotor was worn down flush with the rest of the rotor = side.  The=20 side itself is also severely ground.  Make no mistake, the "ground=20 metal" flag is set to 1 :-)  
 
The oil = I sent them was=20 the last 8 ounces or so that was in the bottom of the pan, which is = poor=20 practice in itself, but it's all I had.  The oil pickup couldn't = reach it,=20 so I doubt this is a case of the filter catching it all, though it's a = better=20 explanation than I have.   
 
I = believe that routine=20 oil analysis can probably be of some value as far as trends might go, = but I'm=20 extremely under whelmed by the results of this test.  It just seems = to me=20 that something should have been screaming "damage", but clearly it = isn't. =20
 
Cheers,
Rusty = (maybe my rotors=20 were calcium coated)



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