X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4674602 for flyrotary@lancaironline.net; Fri, 14 Jan 2011 09:28:12 -0500 Received-SPF: none receiver=logan.com; client-ip=207.115.11.52; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-85-106-221.mco.bellsouth.net[98.85.106.221]) by isp.att.net (frfwmhc02) with SMTP id <20110114142734H0200ouf9ie>; Fri, 14 Jan 2011 14:27:34 +0000 X-Originating-IP: [98.85.106.221] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Apex seal update cont with pix of rotor andapexseals Date: Fri, 14 Jan 2011 09:27:34 -0500 Message-ID: <68239B72E77C4B8AA5FBA3503568823B@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01CBB3CD.470E7AF0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Acuz7bs6may+qJRcTLyWkTq8fr6nvgACBKgw X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_002B_01CBB3CD.470E7AF0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Chris, How long did you run with low oil pressure/no oil? The oil cools the rotors, a lack of it could have overheated them and weakened the springs?? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber Sent: Friday, January 14, 2011 8:19 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Apex seal update cont with pix of rotor andapexseals 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 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 timing, 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 not. 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 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 seals My first impression is they got overheated. Each apex appears very dark, possibly 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-mails attached to it, may contain confidential information that is legally privileged. 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, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error, please immediately notify us by telephone at 713-662-8132 and destroy the original transmission and its attachments without reading them. Thank you. ------=_NextPart_000_002B_01CBB3CD.470E7AF0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Chris,

How long did you run with low oil pressure/no oil?  The oil cools the rotors, a lack of it could have overheated them and weakened the springs??

 

Bill B

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris = Barber
Sent: Friday, January 14, = 2011 8:19 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Apex seal update cont with pix of rotor andapexseals

 

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 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 timing, 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 not.

 

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

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 andapex seals

My first impression is they got = overheated.  Each apex appears very dark, possibly due to heat.  Are you pre-mixing or using the injection 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:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.h= tml

 


Warning: This e-mail transmission, and any documents, files or previous = e-mails attached to it, may contain confidential information that is legally privileged. 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, distribution or use of any of the information = contained in or attached to this transmission is STRICTLY PROHIBITED. If you have = received this transmission in error, 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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