X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from omr-d05.mx.aol.com ([205.188.109.202] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6322091 for lml@lancaironline.net; Wed, 12 Jun 2013 17:11:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.109.202; envelope-from=Sky2high@aol.com Received: from mtaomg-db06.r1000.mx.aol.com (mtaomg-db06.r1000.mx.aol.com [172.29.51.204]) by omr-d05.mx.aol.com (Outbound Mail Relay) with ESMTP id 16B17700000B3 for ; Wed, 12 Jun 2013 17:10:59 -0400 (EDT) Received: from core-mtb002a.r1000.mail.aol.com (core-mtb002.r1000.mail.aol.com [172.29.234.197]) by mtaomg-db06.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id CA6CFE00008B for ; Wed, 12 Jun 2013 17:10:58 -0400 (EDT) From: Sky2high@aol.com Full-name: Sky2high Message-ID: <7660e.62027b4e.3eea3de2@aol.com> Date: Wed, 12 Jun 2013 17:10:58 -0400 (EDT) Subject: Re: [LML] EGT on runup To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_7660e.62027b4e.3eea3de2_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1371071459; bh=6PnJNDrIbYdLffTHc0F1+NZPSYfQpcjlVIFVv7tRKeM=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=aBu4P4wTNasxpND+xO0cS5LyCjBW6mIm59wVqgBWaY1yz7/M7jHCqZxMlHo31PXWx b8xT8UuO8WN//6zu9bmUwr9GyWgxKnyD6YY9t2AiDGiKxjG/Wkf7vzW/4Vzt6vttzk IgFLDsmF+3Yui28KOgQFUDK1wFXwFNN3nZ69Xulg= X-AOL-SCOLL-SCORE: 0:2:477463840:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d33cc51b8e3e24e9b --part1_7660e.62027b4e.3eea3de2_boundary Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en John, =20 Check the timing of the mags. EI alone produces a good spark that may =20 cause more of the fuel to burn in the cylinder. Mag only may not start a= n=20 energetic burn leaving some fuel to continue burning in the exhaust pipe -= or=20 the timing may be different that the EI - perhaps retarded further than it= =20 should. =20 Grayhawk=20 =20 =20 In a message dated 6/12/2013 8:36:40 A.M. Central Daylight Time, =20 jbarrett@carbinge.com writes: =20 Hello all,=20 Hope you don=E2=80=99t mind I may be a pain in the butt for a while. I= =E2=80=99m=20 breaking in this new Barrett Precision Engines TSIO 550 and hope some of = you won=E2=80=99 t mind answering niggling questions that will come up as I go through the= =20 process. I have about 6.5 hours on it now and the CHT=E2=80=99s are comin= g down=20 nicely. Still running full rich and cycling the power in cruise from abou= t=20 33 inches MAP down to 25=E2=80=9D in gradual increments. Today I got to 1= 2,500 and=20 stayed there about an hour with CHT=E2=80=99s never going to 400 and after= the=20 initial climb and level off, they stayed below 380. Previous flights, I c= ould=20 not seem to keep #3 below 400 above about 10,000 ft, even when powering=20 back. So it looks like the rings are seating well and break in is on trac= k.=20 I did notice one thing that I don=E2=80=99t recall seeing before during en= gine run=20 up before takeoff. The EGT=E2=80=99s all went to caution temps when I swi= tched to=20 the MAG at 1700 RPM. The drop on the MAG has been a bit high =E2=80=93 us= ually=20 over 100 RPM and inconsistent. Sometimes it could be 95 RPM and it has be= en=20 as high as 145 RPM. Today I think it was close to the higher number. I= =20 have the EGT caution warning go off at 1475. I know that=E2=80=99s not=20 particularly high but it=E2=80=99s the first time bitching Betty has gone = ballistic six times=20 in a row in short order like that. As expected there is no drop on the=20 Lightspeed ignition and the EGT=E2=80=99s don=E2=80=99t seem to change muc= h when selecting=20 only that ignition source.=20 Any thoughts on that?=20 Regards,=20 John Barrett, CEO=20 Leading Edge Composites=20 PO Box 428=20 Port Hadlock, WA 98339=20 www.carbinge.com=20 --part1_7660e.62027b4e.3eea3de2_boundary Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
John,
 
Check the timing of the mags.  EI alone produces a good spark tha= t may=20 cause more of the fuel to burn in the cylinder.   Mag only m= ay=20 not start an energetic burn leaving some fuel to continue burning in t= he=20 exhaust pipe - or the timing may be different that the EI - perhaps retarde= d=20 further than it should.
 
Grayhawk 
 
In a message dated 6/12/2013 8:36:40 A.M. Central Daylight Time,=20 jbarrett@carbinge.com writes:
=

Hello all,

 

Hope you don=E2=80=99t mind I may be a pain in the b= utt for a =20 while.  I=E2=80=99m breaking in this new Barrett Precision Engines&n= bsp; TSIO 550=20 and hope some of you won=E2=80=99t mind answering niggling questions that= will come up=20 as I go through the process.  I have about 6.5 hours on it now and t= he=20 CHT=E2=80=99s are coming down nicely.  Still running full rich and c= ycling the=20 power in cruise from about 33 inches MAP down to 25=E2=80=9D in gradual= =20 increments.  Today I got to 12,500 and stayed there about an hour wi= th=20 CHT=E2=80=99s never going to 400 and after the initial climb and level of= f, they=20 stayed below 380.  Previous flights, I could not seem to keep #3 bel= ow=20 400 above about 10,000 ft, even when powering back.  So it looks lik= e the=20 rings are seating well and break in is on track.

 

I did notice one thing that I don=E2=80=99t recall s= eeing before=20 during engine run up before takeoff.  The EGT=E2=80=99s all went to = caution temps=20 when I switched to the MAG at 1700 RPM.  The drop on the MAG has bee= n a=20 bit high =E2=80=93 usually over 100 RPM and inconsistent.  Sometimes= it could be=20 95 RPM and it has been as high as 145 RPM.  Today I think  = ; it=20 was close to the higher number.  I have the EGT caution warning go o= ff at=20 1475.  I know that=E2=80=99s not particularly high but it=E2=80=99s = the first time=20 bitching Betty has gone ballistic six times in a row in short order like= =20 that.  As expected there is no drop on the Lightspeed ignition and t= he=20 EGT=E2=80=99s don=E2=80=99t seem to change much when selecting only that = ignition=20 source.

 

Any thoughts on that?

 

Regards,

 

John Barrett, CEO

Leading Edge Composites

PO Box 428

Port Hadlock, WA 98339

 

www.carbinge.com

 

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