X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: (direct reply)\eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from mail01.syd.optusnet.com.au ([211.29.132.182] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTPS id 866899 for flyrotary@lancaironline.net; Tue, 12 Apr 2005 19:07:01 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.182; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-246-199.dsl.nsw.optusnet.com.au [220.236.246.199]) by mail01.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3CN6BSm015453 for ; Wed, 13 Apr 2005 09:06:12 +1000 Message-ID: <001401c53fb4$bb9f4e50$c7f6ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: The Final? story on the engine problem Date: Wed, 13 Apr 2005 09:09:51 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C54008.8CFA5820" 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 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C54008.8CFA5820 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed, I believe that is your culprit - too much slop with one apex seal taking = out the rest. On the positive side you get to try the new RX8 rotors ( if your = inclined) - you beat me to it, on this list anyway, as their being used = in all sorts of racing and street use - Bugger!! I guess that's only fair, as you have been around this stuff a lot = longer than me anyway, but I'm catching -up! George ( down under) ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 13, 2005 8:53 AM Subject: [FlyRotary] Re: The Final? story on the engine problem No, George I did not. This was assembled back in 2001 and did not = think to check the apex grove, however, I do think I detected a bit of = a "V" shape to at least one. I am going to go back out and measure it = to see whether it was my imagination or real. Thanks for the suggestion of the Rx-8 Rotors they are quite a bit = cheaper than the 9.7:1 for the NA 91. However, Mazdatrix has not found = anyone to mill them for the Rx-7 Apex seal, yet. They told me to check = back in a couple of weeks. Ed ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Tuesday, April 12, 2005 6:44 PM Subject: [FlyRotary] Re: The Final? story on the engine problem Ed, Did you check side clearances in the apex groove before assembly? George ( down under) ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 13, 2005 5:15 AM Subject: [FlyRotary] The Final? story on the engine problem Second set of photos=20 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 -------------------------------------------------------------------------= - >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0011_01C54008.8CFA5820 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
I believe that is your culprit - too = much slop=20 with one apex seal taking out the rest.
 
On the positive side you get to try the = new RX8=20 rotors ( if your inclined) - you beat me to it, on this list = anyway, as=20 their being used in all sorts of racing and street use=20 - Bugger!!
 
I guess that's only fair, as you have = been around=20 this stuff a lot longer than me anyway, but I'm catching = -up!
 
George ( down under)
----- Original Message -----
From:=20 Ed=20 Anderson
Sent: Wednesday, April 13, 2005 = 8:53=20 AM
Subject: [FlyRotary] Re: The = Final? story=20 on the engine problem

No, George I did not.  This was = assembled=20 back in 2001 and did not think to check the apex grove, however, I do = think I=20 detected a  bit of a "V" shape to at least one.  I am going = to go=20 back out and measure it to see whether it was my imagination or=20 real.
 
Thanks for the suggestion of the Rx-8 = Rotors they=20 are quite a bit cheaper than the 9.7:1 for the NA 91.  However, = Mazdatrix=20 has not found anyone to mill them for the Rx-7 Apex seal, yet.  = They told=20 me to check back in a couple of weeks.
 
Ed
----- Original Message -----
From:=20 George Lendich
To: Rotary motors in = aircraft=20
Sent: Tuesday, April 12, 2005 = 6:44=20 PM
Subject: [FlyRotary] Re: The = Final?=20 story on the engine problem

Ed,
Did you check side clearances in = the apex=20 groove before assembly?
George ( down under)
----- Original Message ----- =
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Wednesday, April 13, = 2005 5:15=20 AM
Subject: [FlyRotary] The = Final? story=20 on the engine problem

Second set of photos =
 
Photo Apex Scrapes shows that the = ejected=20 apex seal piece probably  made it around the chamber a couple = of=20 times, one impression looks to be smaller than the width of the = ejected=20 piece - so perhaps it broke up further in its round.
 
Photo Apex Slot Peened shows that = the 2nd=20 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=20 its slot.  I had to pry the opposite end of the seal up to = the=20 position you see.
 
Ed Anderson
Rv-6A N494BW = Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
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