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 4674652 for flyrotary@lancaironline.net; Fri, 14 Jan 2011 10:00:55 -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; Fri, 14 Jan 2011 08:56:53 -0600 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Apex seal update cont with pix of rotorandapexseals Thread-Topic: [FlyRotary] Re: Apex seal update cont with pix of rotorandapexseals Thread-Index: AQHLs/hx2TqAaqYO3k2Q4CWikdC7j5PQimC0 Date: Fri, 14 Jan 2011 15:00:15 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D303563D05A@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: [166.139.76.11] Content-Type: multipart/alternative; boundary="_000_2D41F9BF3B5F9842B164AF93214F3D303563D05AFCDMAIL06FCDATA_" MIME-Version: 1.0 --_000_2D41F9BF3B5F9842B164AF93214F3D303563D05AFCDMAIL06FCDATA_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, luckily, so far, the actual seals look good. I already had my hand s= lapped by PL for using aftermarket seals (I usually don't post this type of= stuff there since I am not PPorted and there is so much theory there. Hap= py to have the theory as it can be interesting at times.). They are suppos= ed to be the heavy duty seals but are two piece (I so hope not to drop a se= al end on the floor, it can take HOURS to find. Don't ask me how I know X 2= ) I believe the springs I ordered from Mazdatrix are Mazda. I did have a glitch in my timing readings and played with it a bit...this w= ith lean mixture is more to think about. Chris ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = John Slade [jslade@canardaviation.com] Sent: Friday, January 14, 2011 8:39 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Apex seal update cont with pix of rotorandapexseal= s This doesn't make sense, Chris. In the early days with the fixed pitch prop= I could HEAR detonation starting during the runup. I throttled back a bit = and it went away. My seals were undamaged. I boost 5 - 7 lbs. (44map). The = one thing that jumped out from your list that I never did was play with the= timing. Obviously I had the same lack of inter-cooling during static and t= axi tests and my engine would get hot. The biggest difference between our e= ngines is the seals themselves - mine are the 3mm 'indestructible' type. Regards John On 1/14/2011 8:19 AM, Chris Barber wrote: I am premixing. Also, I am only using three lbs of boost. I was under the impression that = this low of boost should not be a problem. I know there are many other pos= sible causes and will be investigating. I may start by putting in a lower boost spring in the waste gate (1.5 lbs) = but I am not really thinking this is the issue. Perhaps timing, as I did p= lay with it quite a bit before I sent my EC2 to Tracy for a check and updat= e. My higher power tests were quite short as the engine would get hot fast= but never to any degree that I would have thought would be a problem. I have an intercooler, however, without any airflow its usefulness during t= esting is next to nothing. Also, the intercooler ducting is somewhat minimu= m at this point. I thought I would recognize detonation, as Lynn mentioned, but perhaps not. I also read on the RX-7 site that the rear chamber is the one to usually fa= il, as mine seems to bare out. Christopher Barber, JD. Corporal; Patrol Division Master Peace Officer Badge 330 Bellaire Police Department 5100 Jessamine Bellaire, Texas 77401 713-668-0487 CBarber@BellariePolice.com ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Mark Steitle [msteitle@gmail.com] Sent: Friday, January 14, 2011 05:52 To: Rotary motors in aircraft Subject: [FlyRotary] Re: Apex seal update cont with pix of rotor andapex se= als My first impression is they got overheated. Each apex appears very dark, p= ossibly due to heat. Are you pre-mixing or using the injection pump. Mark On Thu, Jan 13, 2011 at 8:52 PM, Chris Barber > wrote: ...and finally, for now. Thanks folks Chris -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.= html Warning: This e-mail transmission, and any documents, files or previous e-m= ails attached to it, may contain confidential information that is legally p= rivileged. If you are not the intended recipient or the person responsible = for delivering it to the intended recipient, you are hereby notified that a= ny disclosure, copying, distribution or use of any of the information conta= ined in or attached to this transmission is STRICTLY PROHIBITED. If you hav= e received this transmission in error, please immediately notify us by tele= phone at 713-662-8132 and destroy the original transmission and its attachm= ents without reading them. Thank you. --_000_2D41F9BF3B5F9842B164AF93214F3D303563D05AFCDMAIL06FCDATA_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Well, luckily, so far, the actual seals look good.  I already had m= y hand slapped by PL for using aftermarket seals (I usually don't= post this type of stuff there since I am not PPorted an= d there is so much theory there.  Happy to have the theory as it can be interesting at times.).  They are supposed t= o be the heavy duty seals but are two piece (I so hope not to drop a seal e= nd on the floor, it can take HOURS to find. Don't ask me how I know X 2)

 

I believe the springs I ordered from Mazdatrix are Ma= zda.

 

I did have a glitch in my timing readings and played with it a bit...thi= s with lean mixture is more to think about.

 

Chris

 

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of John Slade [jslade@canardaviation.com]
Sent: Friday, January 14, 2011 8:39 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Apex seal update cont with pix of rotoranda= pexseals

This doesn't make sense, Chris. In the early days with the fixed pitch= prop I could HEAR detonation starting during the runup. I throttled back a= bit and it went away. My seals were undamaged. I boost 5 - 7 lbs. (44map).= The one thing that jumped out from your list that I never did was play with the timing. Obviously I had the s= ame lack of inter-cooling during static and taxi tests and my engine would = get hot. The biggest difference between our engines is the seals themselves= - mine are the 3mm 'indestructible' type.
Regards
John


On 1/14/2011 8:19 AM, Chris Barber wrote:

I am premixing.

 

Also, I am only using three lbs of boost.  I was under the impressi= on that this low of boost should not be a problem.  I know there are m= any other possible causes and will be investigating. 

 

I may start by putting in a lower boost spring in the waste gate (1= .5 lbs) but I am not really thinking this is the issue.  Perhaps timin= g, as I did play with it quite a bit before I sent my EC2 to Tracy for= a check and update.  My higher power tests were quite short as the engine would get hot fast but never to any degree that = I would have thought would be a problem.

 

I have an intercooler, however, without any airflow its usefulness = during testing is next to nothing. Also, the intercooler ducting = is somewhat minimum at this point.

 

I thought I would recognize detonation, as Lynn mentioned, but perhaps n= ot.

 

I also read on the RX-7 site that the rear chamber is the one to usually= fail, as mine seems to bare out.

 

Christopher Barber, JD.
Corporal; Patrol Division<= /font>
Master Peace Officer
Badge 330
Bellaire Police Department=
5100 Jessamine
Bellaire, Texas 77401
 
713-668-0487
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Mark Steitle [msteitle@gmail.com]
Sent: Friday, January 14, 2011 05:52
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Apex seal update cont with pix of rotor and= apex seals

My first impression is they got overheated.  Each apex appears ve= ry dark, possibly due to heat.  Are you pre-mixing or using the inject= ion pump.  

Mark

On Thu, Jan 13, 2011 at 8:52 PM, Chris Barber <cbarber@= texasattorney.net> wrote:

...and finally, for now.

 

Thanks folks

 

Chris


--
Homepage:  htt= p://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html



Warning: This e-mail transmission, and any documents, files or previous e-m= ails attached to it, may contain confidential information that is legally p= rivileged. If you are not the intended recipient or the person responsible = for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribut= ion or use of any of the information contained in or attached to this trans= mission is STRICTLY PROHIBITED. If you have received this transmission in e= rror, please immediately notify us by telephone at 713-662-8132 and destroy the original transmission and = its attachments without reading them. Thank you.


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