X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: \eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 867140 for flyrotary@lancaironline.net; Tue, 12 Apr 2005 23:36:28 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.75 ([204.127.135.75]) by worldnet.att.net (mtiwmhc12) with SMTP id <2005041303354311200lmfkme>; Wed, 13 Apr 2005 03:35:53 +0000 Received: from [209.247.222.114] by 204.127.135.75; Wed, 13 Apr 2005 03:35:42 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: The Final? story on the engine problem Date: Wed, 13 Apr 2005 03:35:42 +0000 Message-Id: <041320050335.14220.425C938E000227110000378C2160466648019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_14220_1113363342_0" --NextPart_Webmail_9m3u9jl4l_14220_1113363342_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Ed, Sure looks familar.......I spent the day taking a 89-91 core engine apart to recover one good 9.7 to 1 rotor......Other rotor suffered apex seal failure (stock 3 piece seals).......Rotor looks alot like yours.......Rotor hsgs are shot .......End hsgs serviceable but should probably be lapped.......It has taken two core engines to get two good 9.7 rotors.......Such is life !! -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Ed Anderson" : -------------- Second set of photos Photo Apex Scrapes shows that the ejected apex seal piece probably made it around the chamber a couple of times, one impression looks to be smaller than the width of the ejected piece - so perhaps it broke up further in its round. Photo Apex Slot Peened shows that the 2nd apex seal of #1 rotor that would not move up and down - clear why, now. The departing piece peened over the slot and froze the seal in its slot. I had to pry the opposite end of the seal up to the position you see. Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com --NextPart_Webmail_9m3u9jl4l_14220_1113363342_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Ed,
     Sure looks familar.......I spent the day taking a 89-91 core engine apart
to recover one good 9.7 to 1 rotor......Other rotor suffered apex seal failure
(stock 3 piece seals).......Rotor looks alot like yours.......Rotor hsgs are shot
.......End hsgs serviceable but should probably be lapped.......It has taken
two core engines to get two good 9.7 rotors.......Such is life !!
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from "Ed Anderson" <eanderson@carolina.rr.com>: --------------

Second set of photos
 
Photo Apex Scrapes shows that the ejected apex seal piece probably  made it around the chamber a couple of times, one impression looks to be smaller than the width of the ejected piece - so perhaps it broke up further in its round.
 
Photo Apex Slot Peened shows that the 2nd apex seal of #1 rotor that would not move up and down - clear why, now.  The departing piece peened over the slot and froze the seal in its slot.  I had to pry the opposite end of the seal up to the position you see.
 
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
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