X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.129.170.194] (HELO VIRCOM1.fcdata.private) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4674079 for flyrotary@lancaironline.net; Thu, 13 Jan 2011 22:56:50 -0500 Received-SPF: none receiver=logan.com; client-ip=64.129.170.194; envelope-from=cbarber@texasattorney.net Received: from FCD-MAIL06.FCDATA.PRIVATE ([fe80::697f:d6aa:b87:78d8]) by FCD-MAIL05.FCDATA.PRIVATE ([fe80::809d:a06e:5913:452e%15]) with mapi id 14.01.0270.001; Thu, 13 Jan 2011 21:52:51 -0600 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Apex seal update cont Thread-Topic: [FlyRotary] Re: Apex seal update cont Thread-Index: AQHLs5vnkKo5kpvQE0yRInH6kylBopPP1dlK Date: Fri, 14 Jan 2011 03:56:14 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D303563CC65@FCD-MAIL06.FCDATA.PRIVATE> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [99.98.105.202] Content-Type: multipart/alternative; boundary="_000_2D41F9BF3B5F9842B164AF93214F3D303563CC65FCDMAIL06FCDATA_" MIME-Version: 1.0 --_000_2D41F9BF3B5F9842B164AF93214F3D303563CC65FCDMAIL06FCDATA_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kelly, Don't know. It crossed my mind, but not really thinking of flattening, bef= ore I pulled the iron I was thinking the seals themselves may be broken and= that it may be due to detonation. I have not had anything that would make= me think detonation was an issue. Remember, my boost is low at 3lb (using= a preset spring in the wastegate: no adjustment ability). I think I read about the springs on the RX7 club site but do not recall. I= did read about it in the last week, but the post may have been a few years= old. My rebuild kit from RA or Bruce T was purchased a number of years ag= o...perhaps circa 2005 (?) Chris ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Kelly Troyer [keltro@att.net] Sent: Thursday, January 13, 2011 9:36 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Apex seal update cont Chris, Have not heard of bad RA springs but has anyone in the racing crowd (Turb= o) ever mentioned detonation as a suspect in flattened apex seal springs and/= or broken corner seals and flattened springs ??.............. Kelly Troyer "DYKE DELTA JD2" (Eventually) "13B ROTARY"_ Engine "RWS"_RD1C/EC2/EM2 "MISTRAL"_Backplate/Oil Manifold "TURBONETICS"_TO4E50 Turbo ________________________________ From: Chris Barber To: Rotary motors in aircraft Sent: Thu, January 13, 2011 8:49:13 PM Subject: [FlyRotary] Apex seal update cont I pulled the rear iron tonight to check the apex seals. Luckily, the apex = seals themselves look good. Also, the combustion chamber looks as I think = it should. However, I did find some issues. The one I was expecting was that the apex springs were flat. Also, one of = the apex corner seal plugs was broken as was a small piece off of one of th= e side seals. No damage was apparent inside the chamber so I think they br= oke as I was taking them out. Donno, but there is not apparent damage insi= de at all. Also, the springs for the corner seals were flat. The really strange thing to me is that the rubber apex corner seal plugs, t= he little rubber inserts that seems to hold the assemble together were gone= ....none of the six were anywhere to be found. This engine has not been ov= erheated to any abusive degree, but the inserts were gone. I am still waiting for the Mazda apex seal springs to arrive from Mazdatrix= . I will now need to order the rubber inserts as well and the corner sprin= gs and wait for them to arrive. Thoughts? I on an RX7 forum that some of the early RA springs are now known to be wea= k links. I am attaching some photos. Note, the springs are laying on their sides. All the best, Chris Barber Houston --_000_2D41F9BF3B5F9842B164AF93214F3D303563CC65FCDMAIL06FCDATA_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Kelly,

 

Don't know.  It crossed my mind, but not really thinking of flatten= ing, before I pulled the iron I was thinking the seals themselves ma= y be broken and that it may be due to detonation.  I have not had anyt= hing that would make me think detonation was an issue.  Remember, my boost is low at 3lb (using= a preset spring in the wastegate: no adjustment ability).

 

I think I read about the springs on the RX7 club site= but do not recall.  I did read about it in the last week, but the pos= t may have been a few years old.  My rebuild kit from RA or Bruce T wa= s purchased a number of years ago...perhaps circa 2005 (?)

 

Chris

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of Kelly Troyer [keltro@att.net]
Sent: Thursday, January 13, 2011 9:36 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Apex seal update cont

Chris,
  Have not heard of bad RA springs but has anyone in the racing c= rowd (Turbo)
 ever mentioned detonation as a suspect in flattened apex seal springs= and/or
 broken corner seals and flattened springs ??..............
 

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo


From: Chris Barber <cbar= ber@texasattorney.net>
To: Rotary motors in aircra= ft <flyrotary@lancaironline.net>
Sent: Thu, January 13, 2011= 8:49:13 PM
Subject: [FlyRotary] Apex s= eal update cont

I pulled the rear iron tonight to check the apex seals.  Luckily, t= he apex seals themselves look good.  Also, the combustion chamber looks as I think it should.  However, I did= find some issues.

 

The one I was expecting was that the apex springs were flat.  Also,= one of the apex corner seal plugs was broken as was a small piece off of o= ne of the side seals.  No damage was appa= rent inside the chamber so I think they broke as I was taking them out.  Donno, but there is not apparent damage ins= ide at all.

 

Also, the springs for the corner seals were flat.

 

The really strange thing to me is that the rubber apex corner seal plugs= , the little rubber inserts that seems to hold the assemble together were g= one....none of the six were anywhere to be found.  This engine has not= been overheated to any abusive degree, but the inserts were gone.

 

I am still waiting for the Mazda apex seal springs to arrive from Mazdatrix.  I will now need to order the rubber inserts as well and the c= orner springs and wait for them to arrive.

 

Thoughts?

 

I on an RX7 forum t= hat some of the early RA springs are now known to be weak links. 

 

I am attaching some photos. Note, the springs are laying on their sides.=

 

All the best,

 

Chris Barber

Houston

--_000_2D41F9BF3B5F9842B164AF93214F3D303563CC65FCDMAIL06FCDATA_--