X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [65.54.250.88] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1070664 for flyrotary@lancaironline.net; Mon, 17 Apr 2006 10:04:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.250.88; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 17 Apr 2006 06:59:50 -0700 Message-ID: Received: from 4.171.150.191 by BAY115-DAV16.phx.gbl with DAV; Mon, 17 Apr 2006 13:59:46 +0000 X-Originating-IP: [4.171.150.191] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Typical EGT Date: Mon, 17 Apr 2006 09:59:43 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005C_01C66205.A64CB000" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0026.0800 Seal-Send-Time: Mon, 17 Apr 2006 09:59:43 -0400 X-OriginalArrivalTime: 17 Apr 2006 13:59:50.0867 (UTC) FILETIME=[31FEDA30:01C66227] This is a multi-part message in MIME format. ------=_NextPart_000_005C_01C66205.A64CB000 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, don't get quite that comfortable with it. I am not a turbo = expert (no Holiday Inn visits either) but there is typically a 200 deg = drop after the turbo so 1800 down stream may represent 2000 upstream, = not a feel good number. Just a gut-feel number, but try 1760 = down-stream EGT redline and see if you can live with it. Any of you turbo guys ever measure upstream EGTs? I'm shooting in the = dark here. Tracy ----- Original Message -----=20 From: John Slade=20 To: Rotary motors in aircraft=20 Sent: Sunday, April 16, 2006 2:29 PM Subject: [FlyRotary] Re: Typical EGT I'm measuring downstream of the turbo. I guess I'll just set the alarm up to 1800 and stop worrying about it. Thanks. John Tracy Crook wrote: > Hells' bells John, 1650 on takeoff is stone cold. I normally saw = 1760=20 > - 1800 on a NA 13B. Turbos normally run higher (pre- turbo) than = NA.=20 > =20 > BTW, which side of the turbo are you measuring? Temps are lower=20 > down-stream. Another observation - A turbo with LESS restriction = will=20 > give higher EGT readings down-stream of the turbine so this could be = > normal. > =20 > Tracy > > ----- Original Message ----- > *From:* John Slade = > > *To:* Rotary motors in aircraft = > > *Sent:* Saturday, April 15, 2006 8:33 PM > *Subject:* [FlyRotary] Typical EGT > > Rotarians, > When I installed my T04 turbo I must have damaged the EGT probe. = I > was > seeing 500F on take-off. Today I installed a new probe and it > looks like > the new turbo runs a lot hotter than the old one. While = installing > the > new probe I noticed that the ceramic coating on the turbo had > turned to > dust. > > On take-off today I saw 1730 and the EGT alarm went off. I = backed off > the throttle and flew with it down around 1600, but that only = gets me > around 4500 rpm and zero boost. Bring it up to 5000 rpm and I = see > 1650. > This is with the mixture a little higher than mid scale. Richen = the > mixture a tad and I can reduce EGT by 30 F or so. If I bring the > rpm up > to 5300 the EGT is up to 1700 pretty quickly. Oil and coolant > temps are > fine at around 180 - 190. I put 3.3 hours on the plane today = with no > other issues, but at 4500 rpm I don't get there very fast. :( > > What do other rotary flyers consider max EGT, and what could be > causing > it to be so high (if this is really high)? > John > N96PM > 60.5 Hrs. > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ > -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_005C_01C66205.A64CB000 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Well, don't get quite that comfortable with = it.  =20 I am not a turbo expert (no Holiday Inn visits either) but there is = typically a=20 200 deg drop after the turbo so 1800 down stream may represent 2000 = upstream,=20 not a feel good number.  Just a gut-feel number, but try = 1760=20 down-stream EGT redline and see if you can live with it.
 
Any of you turbo guys ever measure upstream EGTs?  I'm = shooting in the=20 dark here.
 
Tracy
 
----- Original Message -----
From: John=20 Slade
To: Rotary motors in = aircraft
Sent: Sunday, April 16, 2006 = 2:29=20 PM
Subject: [FlyRotary] Re: = Typical=20 EGT

I'm measuring downstream of the turbo.
I guess I'll = just set=20 the alarm up to 1800 and stop worrying about=20 it.
Thanks.
John

Tracy Crook wrote:
> Hells' bells = John,=20 1650 on takeoff is stone cold.  I normally saw 1760
> - = 1800 on a=20 NA 13B.  Turbos normally run higher (pre- turbo) than NA. =
> =20
>  BTW, which side of the turbo are you measuring?  = Temps are=20 lower
> down-stream.  Another observation - A turbo with = LESS=20 restriction will
> give higher EGT readings down-stream of the = turbine=20 so this could be
> normal.
> 
>=20 Tracy
>
>     ----- Original Message=20 -----
>     *From:* John Slade <mailto:sladerj@bellsouth.net>= ;
>    =20 *To:* Rotary motors in aircraft <mailto:flyrotary@lancaironlin= e.net>
>    =20 *Sent:* Saturday, April 15, 2006 8:33 = PM
>    =20 *Subject:* [FlyRotary] Typical = EGT
>
>    =20 Rotarians,
>     When I installed my T04 = turbo I=20 must have damaged the EGT probe. I
>    =20 was
>     seeing 500F on take-off. Today I = installed=20 a new probe and it
>     looks=20 like
>     the new turbo runs a lot hotter = than the=20 old one. While installing
>    =20 the
>     new probe I noticed that the = ceramic=20 coating on the turbo had
>     turned=20 to
>    =20 dust.
>
>     On take-off today I saw = 1730 and=20 the EGT alarm went off. I backed off
>     = the=20 throttle and flew with it down around 1600, but that only gets=20 me
>     around 4500 rpm and zero boost. = Bring it up=20 to 5000 rpm and I see
>    =20 1650.
>     This is with the mixture a = little higher=20 than mid scale. Richen the
>     mixture a = tad and I=20 can reduce EGT by 30 F or so. If I bring = the
>    =20 rpm up
>     to 5300 the EGT is up to 1700 = pretty=20 quickly. Oil and coolant
>     temps=20 are
>     fine at around 180 - 190. I put = 3.3 hours=20 on the plane today with no
>     other = issues, but=20 at 4500 rpm I don't get there very fast.=20 :(
>
>     What do other rotary flyers = consider max EGT, and what could be
>    =20 causing
>     it to be so high (if this is = really=20 high)?
>     = John
>    =20 N96PM
>     60.5=20 Hrs.
>
>    =20 --
>     Homepage:  http://www.flyrotary.com/
>&= nbsp;   =20 Archive and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
>


--
Homepage: = ;=20 http://www.flyrotary.com/
Archi= ve and=20 UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
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