X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTP id 675473 for flyrotary@lancaironline.net; Fri, 19 Aug 2005 22:04:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=13brv3@bellsouth.net Received: from ibm62aec.bellsouth.net ([65.6.194.9]) by imf20aec.mail.bellsouth.net with ESMTP id <20050820020326.CWUT21196.imf20aec.mail.bellsouth.net@ibm62aec.bellsouth.net> for ; Fri, 19 Aug 2005 22:03:26 -0400 Received: from rd ([65.6.194.9]) by ibm62aec.bellsouth.net with ESMTP id <20050820020326.ELVH1144.ibm62aec.bellsouth.net@rd> for ; Fri, 19 Aug 2005 22:03:26 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Rotary Diagnosis please Date: Fri, 19 Aug 2005 21:03:26 -0500 Message-ID: <003701c5a52b$5a19bc60$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0038_01C5A501.7143B460" 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 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0038_01C5A501.7143B460 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Yes, I replace the oil seal o-rings. Yeah, it was smoking when I got = it. Very low compression on one rotor. Replaced parts with Tracy's overhaul = kit. Bearings in rotors were not replace but looked ok and measured fine. = New apex seals and side seals. I didn't replace the metal oil rings on the rotors as they looked fine. How critical are these anyway and what are the symptoms of failure/damage? =20 Hi Jim, =20 What shape were the side housings in? Were they smooth, flat, and all within specs? Were there any dark spots near the center hole of the housings? =20 =20 I can't recall who asked it, but making sure you put the oil springs in = the proper direction is a good point. If those were allowed to spin, I bet = the oil control o-rings wouldn't last long. =20 =20 Here's something else to look for. Check your oil vent line when you're running. Is there oil mist blowing out? If so, you're not only burning oil, but losing compression past the seals at the same time. This would = be a bad sign. Ask me how I know this :-) =20 If you're worried about the coolant seals, there are some pressure tests = you could do for that as well. =20 =20 Are you running the oil metering pump, or pre-mix? Is there any chance = you have way too much oil with either? =20 =20 Good luck, Rusty (single rotor mount almost complete) =20 ------=_NextPart_000_0038_01C5A501.7143B460 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

Yes, I replace the oil seal o-rings.  Yeah, it = was smoking=20 when I got it.  Very low compression on one rotor. Replaced parts = with=20 Tracy's overhaul kit.  Bearings in rotors were not replace but = looked ok=20 and measured fine.  New apex seals and side seals. I didn't replace = the=20 metal oil rings on the rotors as they looked fine.  How
critical = are=20 these anyway and what are the symptoms of failure/damage?

 
Hi=20 Jim,
 
What = shape were the side=20 housings in?  Were they smooth, flat, and all within specs?  = Were=20 there any dark spots near the center hole of the housings? =20
 
I can't = recall who asked=20 it, but making sure you put the oil springs in the proper direction is a = good=20 point.  If those were allowed to spin, I bet the oil control = o-rings=20 wouldn't last long. 
 
Here's = something else to=20 look for.  Check your oil vent line when you're running.  Is = there oil=20 mist blowing out?  If so, you're not only burning oil, but losing=20 compression past the seals at the same time.  This would be a bad=20 sign.  Ask me how I know this :-)
 
If = you're worried about=20 the coolant seals, there are some pressure tests you could do for = that as=20 well.  
 
Are you = running the oil=20 metering pump, or pre-mix?  Is there any chance you have way = too much=20 oil with either?  
 
Good=20 luck,
Rusty = (single rotor=20 mount almost complete)
  



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