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 619855 for flyrotary@lancaironline.net; Mon, 24 Jan 2005 14:45:59 -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 <20050124194527.YSZH1992.imf17aec.mail.bellsouth.net@rd> for ; Mon, 24 Jan 2005 14:45:27 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Performance coatings- bearing damage? Date: Mon, 24 Jan 2005 13:45:54 -0600 Message-ID: <023101c5024d$511b2d00$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0232_01C5021B.0680BD00" 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_0232_01C5021B.0680BD00 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Will the bearing be damaged at 350 degrees? I'm thinking there's a good chance it will. I'd say no. The is no metal in there that is going to be damaged by 350F. 350C would be another matter. Al As I understand it, the whole issue with keeping the oil temp below 210 is to keep from melting the bearings. While most of this oil cooling is from oil being sprayed on the inside of the rotor, isn't there also a layer of oil constantly being pumped past the bearings themselves? This must help cool them some directly as well. 350 still sounds kinda high. Maybe I can take the bad rotor, and put it in the oven (when my wife isn't home of course). BTW, I would like to apologize to those of you who are now beating your heads against the keyboard screaming "just change the damn bearings" :-) Rusty (STILL waiting for those oil sample results) ------=_NextPart_000_0232_01C5021B.0680BD00 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Will the bearing be = damaged at 350=20 degrees? =20 I'm thinking there's a good chance it will. 

 

I’d = say no.  The=20 is no metal in there that is going to be damaged by 350F.  350C = would be=20 another matter.

 

Al 

 

As I understand=20 it, the whole issue with keeping the oil temp below 210 is to keep from = melting=20 the bearings.  While most of this oil cooling is from oil being = sprayed on=20 the inside of the rotor, isn't there also a layer of oil constantly = being pumped=20 past the bearings themselves?  This must help cool them some = directly as=20 well.  

 

350 still sounds=20 kinda high.  Maybe I can take the bad rotor, and put it in the = oven=20 (when my wife isn't home of course).

 

BTW, I would like=20 to apologize to those of you who are now beating your heads against the = keyboard=20 screaming "just change the damn bearings" =20 :-)

 

Rusty (STILL=20 waiting for those oil sample results)

 

 

 

------=_NextPart_000_0232_01C5021B.0680BD00--