X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 13 Jun 2013 07:36:08 -0400 Message-ID: X-Original-Return-Path: <2thman1@gmail.com> Received: from mail-pb0-f47.google.com ([209.85.160.47] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6322559 for lml@lancaironline.net; Thu, 13 Jun 2013 00:36:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.160.47; envelope-from=2thman1@gmail.com Received: by mail-pb0-f47.google.com with SMTP id rr13so7239465pbb.34 for ; Wed, 12 Jun 2013 21:35:28 -0700 (PDT) X-Received: by 10.66.255.99 with SMTP id ap3mr1088869pad.102.1371098128135; Wed, 12 Jun 2013 21:35:28 -0700 (PDT) X-Original-Return-Path: <2thman1@gmail.com> Received: from [192.168.1.109] ([24.56.209.218]) by mx.google.com with ESMTPSA id at1sm21716976pbc.10.2013.06.12.21.35.26 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 12 Jun 2013 21:35:27 -0700 (PDT) References: In-Reply-To: Mime-Version: 1.0 (1.0) Content-Type: multipart/alternative; boundary=Apple-Mail-AAEC0639-1623-4D6A-8DD0-78B37A5A1270 X-Original-Message-Id: Content-Transfer-Encoding: 7bit X-Mailer: iPad Mail (10B329) From: John Barrett <2thman1@gmail.com> Subject: Re: [LML] Re: EGT on runup X-Original-Date: Wed, 12 Jun 2013 21:35:24 -0700 X-Original-To: Lancair Mailing List --Apple-Mail-AAEC0639-1623-4D6A-8DD0-78B37A5A1270 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Thanks Grayhawk. Will ask my mech to check mag timing. John Sent from my iPad On Jun 12, 2013, at 2:10 PM, Sky2high@aol.com wrote: > John, > =20 > Check the timing of the mags. EI alone produces a good spark that may cau= se more of the fuel to burn in the cylinder. Mag only may not start an ene= rgetic burn leaving some fuel to continue burning in the exhaust pipe - or t= he timing may be different that the EI - perhaps retarded further than it sh= ould. > =20 > Grayhawk=20 > =20 > In a message dated 6/12/2013 8:36:40 A.M. Central Daylight Time, jbarrett@= carbinge.com writes: > Hello all, >=20 > =20 >=20 > Hope you don=E2=80=99t mind I may be a pain in the butt for a while. I=E2= =80=99m breaking in this new Barrett Precision Engines TSIO 550 and hope so= me of you won=E2=80=99t mind answering niggling questions that will come up a= s I go through the process. I have about 6.5 hours on it now and the CHT=E2= =80=99s are coming down nicely. Still running full rich and cycling the pow= er in cruise from about 33 inches MAP down to 25=E2=80=9D in gradual increme= nts. Today I got to 12,500 and stayed there about an hour with CHT=E2=80=99= s never going to 400 and after the initial climb and level off, they stayed b= elow 380. Previous flights, I could not seem to keep #3 below 400 above abo= ut 10,000 ft, even when powering back. So it looks like the rings are seati= ng well and break in is on track. >=20 > =20 >=20 > I did notice one thing that I don=E2=80=99t recall seeing before during en= gine run up before takeoff. The EGT=E2=80=99s all went to caution temps whe= n I switched to the MAG at 1700 RPM. The drop on the MAG has been a bit hig= h =E2=80=93 usually over 100 RPM and inconsistent. Sometimes it could be 95= RPM and it has been as high as 145 RPM. Today I think it was close to th= e higher number. I have the EGT caution warning go off at 1475. I know tha= t=E2=80=99s not particularly high but it=E2=80=99s the first time bitching B= etty has gone ballistic six times in a row in short order like that. As exp= ected there is no drop on the Lightspeed ignition and the EGT=E2=80=99s don=E2= =80=99t seem to change much when selecting only that ignition source. >=20 > =20 >=20 > Any thoughts on that? >=20 > =20 >=20 > Regards, >=20 > =20 >=20 > John Barrett, CEO >=20 > Leading Edge Composites >=20 > PO Box 428 >=20 > Port Hadlock, WA 98339 >=20 > =20 >=20 > www.carbinge.com >=20 > =20 --Apple-Mail-AAEC0639-1623-4D6A-8DD0-78B37A5A1270 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable

Thanks Grayhawk. Will ask my mec= h to check mag timing.

John

Sent from my iPa= d

On Jun 12, 2013, at 2:10 PM, Sky2high@aol.com wrote:

John,

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 ma= y=20 not start an energetic burn leaving some fuel to continue burning in th= e=20 exhaust pipe - or the timing may be different that the EI - perhaps retarded= =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&nb= sp; TSIO 550=20 and hope some of you won=E2=80=99t mind answering niggling questions that w= ill come up=20 as I go through the process. I have about 6.5 hours on it now and th= e=20 CHT=E2=80=99s are coming down nicely. Still running full rich and cy= cling 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 wit= h=20 CHT=E2=80=99s never going to 400 and after the initial climb and level off= , they=20 stayed below 380. Previous flights, I could not seem to keep #3 belo= w=20 400 above about 10,000 ft, even when powering back. So it looks like= 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 c= aution temps=20 when I switched to the MAG at 1700 RPM. The drop on the MAG has been= a=20 bit high =E2=80=93 usually over 100 RPM and inconsistent. Sometimes i= t 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 of= f at=20 1475. I know that=E2=80=99s not particularly high but it=E2=80=99s t= he 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 th= e=20 EGT=E2=80=99s don=E2=80=99t seem to change much when selecting only that i= gnition=20 source.

Any thoughts on that?

Regards,

John Barrett, CEO

Leading Edge Composites

PO Box 428

Port Hadlock, WA 98339

www.carbinge.co= m

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