X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: ####\eX-PolluStop-Score: 0.46\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 870003 for flyrotary@lancaironline.net; Thu, 14 Apr 2005 22:57:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.res.rr.com [24.74.185.127]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j3F2uSLw008468 for ; Thu, 14 Apr 2005 22:56:30 -0400 (EDT) Message-ID: <000401c54166$bdfef700$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: V shape Apex Seal Slots? Date: Thu, 14 Apr 2005 22:56:36 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine ----- Original Message ----- From: "Jim Brewer" To: "Rotary motors in aircraft" Sent: Thursday, April 14, 2005 9:23 PM Subject: [FlyRotary] Re: V shape Apex Seal Slots? On Thu, 14 Apr 2005 16:26:19 -0500, Russell Duffy wrote: > Apex Location Base Top > > > Seal1 1.99mm 2.16 - 2.26mm Seal2 > 1.98mm 2.22 - 2.25mm Seal3 > 1.98mm 2.18 - 2.20mm Clearly the slot is larger at > the top - is this due to design or is this due to wear? Lynn??? > Anybody? Hi Ed, I still have the brand new rotor that was > dropped by the ceramic coaters, and I just measured the two un- > smashed apex seal slots. I also measured the slots on the dead > rotor that was involved in my oil out adventure. All the slots > measure 1.89mm, with no sign of being larger at the top of the slot > than the bottom. Cheers, Rusty (my kingdom for a decent > contractor) Just for the record, how did you guys measure those slots to this degree of accuracy? What tools were used? Were the slots absolutely spotless? Jim Brewer Jim, I used $19 digital readout calipers - great tools and reasonably accurate. The rotor slots were reasonably clean and I did scrap the small amount of carbon away. In any case, if there were carbon deposites at the top of the slots they would have resulted in a smaller not larger gap than the bottom. If had had to have only one "precision" measuring tool, it would be one of those $19.00 digtal calipers. Ed >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html