X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 21 Aug 2011 14:09:47 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTP id 5097748 for lml@lancaironline.net; Fri, 19 Aug 2011 14:46:29 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=ToEqqXuMN9ytlUAxanT6aNDidKJH8EgFkhXwN/UXIS0teSnTvU5Zh9ZkEgLowqM2; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [64.223.110.60] (helo=[192.168.1.24]) by elasmtp-kukur.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1QuU4p-0005nQ-Cn for lml@lancaironline.net; Fri, 19 Aug 2011 14:45:55 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-683-464909858 Subject: Re: [LML] Re: How do I run lean of peak? X-Original-Date: Fri, 19 Aug 2011 14:45:58 -0400 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940afb8f038502dc395130776dfc47c0e75350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 64.223.110.60 --Apple-Mail-683-464909858 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii if it's that bad lean and you are only 70 degrees rich, you may be doing = damage and not know it. i.e. one or more of the cylinders are leaner. On Aug 18, 2011, at 2:23 PM, Don Karich wrote: > my experience with lean of peak operations began with my Malibu. = Malibu had poor experience with engine cylinders going bad at low times = in fact they initially swiched from lycoming to continental for this and = other problems. They found that pilots were sloppy about determining = lean of peak and toasting jugs. There answer for this was a large temp = well marked guage to very carefully, slowly make accurated temp changes = and conservatively adj mixture. Our first io550 went to 2060 hours = without topping. It was rebuilt (no factory reman) and also went the = limit. lesson is to treat engine like a friend. Now I have a legacy and = have a IO 540 with gami's fine tuned to very high standards by Ron = Munson. Engine was balanced, and flowed for evenness and preforms = magnificienly, smooth, consistent with no problems. Now- I am not able = to go lean of peak at all. in fact i usually run 70 degrees rich = (although runs smoothly and happily at 50 ROP) and of course pay for it = at the pump. If I try going lean, the engine runs so rough its scarry. = Also at hi power settings I can detect possible detonation. Hopefully = this will bae a 2000hour engine someday. Exhaust and plugs both show a = nice brown color so not too rich. Just my observations. N42DK > .=20 > On Thu, Aug 18, 2011 at 7:32 AM, Walter Atkinson = wrote: > Colin: >=20 > The course is found at the advancedpilot.com website. It is not = presented by GAMI, but by Advanced Pilot Seminars. >=20 > Thank you for your referral and recommendation. >=20 > Walter Atkinson > Advanced Pilot Seminars >=20 >=20 >=20 > On Aug 18, 2011, at 5:41 AM, Colyn Case wrote: >=20 > goto gami website and take the course. Besides learning how not to = blow up your engine by running "not rich enough" and "not lean enough" = you'll learn a bunch of information that may well save your butt in = other situations. Costs less than a jug. =20 >=20 >=20 > On Aug 17, 2011, at 7:43 AM, Dico Reijers wrote: >=20 >> Hi All, >>=20 >> I am new to LOP operations and am looking for some help. I spoke = with some IV-P owners in oshkosh about this and just wanted to get some = more info and clarification. >>=20 >> I understand that i should run ROP until altitude, then i can run = LOP. The CHTs are supposed to be 390 or less and the TIT 1650 or less. = So since i have not made the "big pull" before, i would like to know how = exactly is the best way. Do i set the cruise power, say 30" and = 2500rpm, then slowly turn out the mixture... Watch the temps rise ( how = hot does it get before it starts to go down again?) and then keep = leaning until i get the TIT back to 1650 and CHT to 380ish or below? = How fast should the leaning happen? I understand i dont want to get the = chts and tits really hot, so i presume i should be leaning relatively = quickly (half a mixture turn per second?) >>=20 >> Has someone ever made a little video with their point and shoot = camera of this process while up in the air? This would be handy for = someone new to running LOP. >>=20 >> Thanks all, >>=20 >> Dico >>=20 >> --=20 >> Regards, >>=20 >> Dico Reijers >>=20 >> InternetWorks Ltd. >> 300 University Avenue >> Charlottetown >> PE, C1A 4M4 >>=20 >> 902-892-4671 (T) >> 888-368-9484 (F) >>=20 >> www.internetworks.ca >> www.apartmentspei.com >=20 >=20 >=20 --Apple-Mail-683-464909858 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii if = it's that bad lean and you are only 70 degrees rich, you may be doing = damage and not know it.

i.e. one or more of the = cylinders are leaner.

On Aug 18, 2011, at 2:23 = PM, Don Karich wrote:

my = experience with lean of peak operations began with my Malibu. Malibu had = poor experience with engine cylinders going bad at low times in fact = they initially swiched from lycoming to continental for this and other = problems. They found that pilots were sloppy about determining lean of = peak and toasting jugs. There answer for this was a large temp well = marked guage to very carefully, slowly make accurated temp changes and = conservatively adj mixture. Our first io550 went to 2060 hours without = topping. It was rebuilt (no factory reman) and also went the limit. = lesson is to treat engine like a friend.  Now I have a legacy and = have a IO 540 with gami's fine tuned to very high standards by Ron = Munson. Engine was balanced, and flowed for evenness and preforms = magnificienly, smooth, consistent with no problems.   Now- I = am not able to go lean of peak at all. in fact i usually run 70 degrees = rich (although runs smoothly and happily at 50 ROP) and of course pay = for it at the pump.  If I try going lean, the engine runs so rough = its scarry. Also at hi power settings  I can detect possible = detonation. Hopefully this will bae a 2000hour engine someday. Exhaust = and plugs both show a nice brown color so not too rich.  Just my = observations. N42DK
.
On Thu, Aug 18, 2011 at 7:32 AM, Walter = Atkinson <walter@advancedpilot.com><= /span> wrote:
Colin:=20

The course is found at the advancedpilot.com website.  It is not = presented by GAMI, but by Advanced Pilot Seminars.

Thank you for your referral and recommendation.

Walter Atkinson
Advanced Pilot Seminars



On Aug 18, 2011, at 5:41 AM, Colyn Case wrote:

goto gami website and take the = course.     Besides learning how not to blow up your engine by = running "not rich enough" and "not lean enough" you'll learn a bunch of = information that may well save your butt in other situations.   =  Costs less than a jug.    =20


On Aug 17, 2011, at 7:43 AM, Dico Reijers wrote:

Hi All,

I am new to LOP operations and = am looking for some help.  I spoke with some IV-P owners in oshkosh = about this and just wanted to get some more info and = clarification.

I understand that i should run ROP until altitude, = then i can run LOP. The CHTs are supposed to be 390 or less and the TIT = 1650 or less. So since i have not made the "big pull" before, i would = like to know how exactly is the best way.  Do i set the cruise = power, say 30" and 2500rpm, then slowly turn out the mixture... Watch = the temps rise ( how hot does it get before it starts to go down again?) = and then keep leaning until i get the TIT back to 1650 and CHT to 380ish = or below?  How fast should the leaning happen? I understand i dont = want to get the chts and tits really hot, so i presume i should be = leaning relatively quickly (half a mixture turn per second?)

Has someone ever made a little video with their point and shoot = camera of this process while up in the air?  This would be handy = for someone new to running LOP.

Thanks all,

Dico

-- =
Regards,

Dico Reijers

InternetWorks Ltd.
300 University = Avenue
Charlottetown
PE, C1A 4M4

902-892-4671 (T)
888-368-9484 (F)

www.internetworks.ca
www.apartmentspei.com




= --Apple-Mail-683-464909858--