Return-Path: Received: from frontend2.cwpanama.net ([201.225.225.168] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 601713 for flyrotary@lancaironline.net; Mon, 10 Jan 2005 10:24:41 -0500 Received-SPF: none receiver=logan.com; client-ip=201.225.225.168; envelope-from=rijakits@cwpanama.net Received: from [201.224.93.110] (HELO usuarioq3efog0) by frontend2.cwpanama.net (CommuniGate Pro SMTP 4.2.1) with SMTP id 33585103; Mon, 10 Jan 2005 10:24:24 -0500 Message-ID: <011501c4f728$76b67cc0$6e5de0c9@usuarioq3efog0> From: "rijakits" To: "Rotary motors in aircraft" , References: Subject: Re: [FlyRotary] Re: turbo EGT probes Date: Mon, 10 Jan 2005 10:24:23 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0111_01C4F6FE.8D967370" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_0111_01C4F6FE.8D967370 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Aren't there any probes that do not actually penetrate all the way into the exhaust port, but rather just close (say about 0.5mm or so) to the exhaust runner? The tem there should be within a couple of degrees of the passin gas.... (Something like the cylinder head temp sensors on aircooled engines) Thomas J. ----- Original Message ----- From: David Staten To: Rotary motors in aircraft Sent: Monday, January 10, 2005 10:05 AM Subject: [FlyRotary] Re: turbo EGT probes Putting the EGT after the turbo will not give true accurate results. Some of the heat energy of the exhaust is converted to mechanical energy and the tailpipe gases are of a lower temp... I'm surmising a few hundred degrees less.. One of the turbo calculator spreadsheets that was making the rounds actually displayed this Delta T as one of its calcs. Now, I DONT know if the relationships stand up "post" turbo (peak, lean of peak, range of variance of temps).. one would think they would.. but that is a guess on my part. Dave cardmarc@charter.net wrote: Only problem is that if a tip piece of the probe breaks off, it will go thru the turbine and make a mess. Just a thought. Many people only put one probe after the turbine because of this possibility. I do not have any firsthand experience with this happening but have heard of it. Marc W From: Bulent Aliev Date: 2005/01/10 Mon AM 01:51:58 GMT To: "Rotary motors in aircraft" Subject: [FlyRotary] EGT probes Hi Guys, I removed my turbo manifold today for ceramic coating, so I want to install two EGT probes, one for each rotor. I want to drill and tap into the cast iron manifold about 1" away from the exhaust ports. My questions are: 1. Any draw backs? 2. Recommendations for probes that will stand up to the heat in this location and will work with the EM2. My engine starts instantly every time. At the beginning I kept the mixture knob to the center position. Any movement to the left and the engine would stumble. Now I'm noticing the knob is fully to the left and it is rich. Not too rich but more than before? I guess it is time to get into the programming stuff? I'm drawing big crowds at the airport with this engine. Today I had to put a yellow rope on the hangar doors so I can work. Handed chairs to the old timers, the youngins had standing room only :) Buly Homepage: http://www.flyrotary.com/ Archive: http://lancaironline.net/lists/flyrotary/List.html Homepage: http://www.flyrotary.com/ Archive: http://lancaironline.net/lists/flyrotary/List.html >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0111_01C4F6FE.8D967370 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Aren't there any probes that do not actually = penetrate all=20 the way into the exhaust port, but rather just close (say about 0.5mm or = so) to=20 the exhaust runner? The tem there should be within a couple of degrees = of the=20 passin gas....
(Something like the cylinder head temp sensors = on=20 aircooled engines)
 
Thomas J.
----- Original Message -----
From:=20 David=20 Staten
Sent: Monday, January 10, 2005 = 10:05=20 AM
Subject: [FlyRotary] Re: turbo = EGT=20 probes

Putting the EGT after the turbo will not give true = accurate=20 results. Some of the heat energy of the exhaust is converted to = mechanical=20 energy and the tailpipe gases are of a lower temp... I'm surmising a = few=20 hundred degrees less.. One of the turbo calculator spreadsheets that = was=20 making the rounds actually displayed this Delta T as one of its=20 calcs.
 
Now, I DONT know if the relationships stand up = "post"=20 turbo (peak, lean of peak, range of variance of temps).. one would = think they=20 would.. but that is a guess on my part.

Dave

cardmarc@charter.net = wrote:
Only problem is that if a tip piece of the probe breaks off, =
it will go thru the turbine and make a mess. Just a thought. Many people =
only put one probe after the turbine because of this possibility. I do =
not have any firsthand experience with this happening but have heard of =
it.
Marc W
  
From: Bulent Aliev <atlasyts@bellsouth.net>=

Date: 2005/01/10 Mon AM 01:51:58 GMT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.n=
et>
Subject: [FlyRotary] EGT probes

Hi Guys,=20
I removed my turbo manifold today for ceramic coating, so I want to =
install
two EGT probes, one for each rotor. I want to drill and tap into the =
cast
iron manifold about 1" away from the exhaust ports. My questions are:
1. Any draw backs?
2. Recommendations for probes that will stand up to the heat in this
location and will work with the EM2.

My engine starts instantly every time. At the beginning I kept the =
mixture
knob to the center position. Any movement to the left and the engine =
would
stumble. Now I'm noticing the knob is fully to the left and it is rich. =
Not
too rich but more than before? I guess it is time to get into the
programming stuff?
I'm drawing big crowds at the airport with this engine. Today I had to =
put a
yellow rope on the hangar doors so I can work. Handed chairs to the old
timers, the youngins had standing room only :)

Buly


    
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