X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 27 Dec 2012 09:54:19 -0500 Message-ID: X-Original-Return-Path: Received: from nm32-vm0.bullet.mail.ne1.yahoo.com ([98.138.229.48] verified) by logan.com (CommuniGate Pro SMTP 6.0) with ESMTPS id 5970072 for lml@lancaironline.net; Thu, 27 Dec 2012 07:26:10 -0500 Received-SPF: none receiver=logan.com; client-ip=98.138.229.48; envelope-from=casey.gary@yahoo.com Received: from [98.138.226.176] by nm32.bullet.mail.ne1.yahoo.com with NNFMP; 27 Dec 2012 12:25:35 -0000 Received: from [98.138.87.6] by tm11.bullet.mail.ne1.yahoo.com with NNFMP; 27 Dec 2012 12:25:35 -0000 Received: from [127.0.0.1] by omp1006.mail.ne1.yahoo.com with NNFMP; 27 Dec 2012 12:25:35 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 434669.35798.bm@omp1006.mail.ne1.yahoo.com Received: (qmail 96650 invoked by uid 60001); 27 Dec 2012 12:25:35 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=lw59rNvevhhCq6j6MCEy5GJoL+qpFlmUs4ZueQcLHsGlR86W6bCdMNLYKnC5YGA4NjK0USo4x0KcahbVuBPJ8IYO9Dn0H8/1My336uYG8y0XJ870Jo6bv1LJSOv0Uiblfs8a+/MF/hcpcRcudYfNothv7uTc626bmiFWMigOWxI=; X-YMail-OSG: Pn4odhUVM1lgYWq2Wg1nihYe9mdIcuhP99GDVNrG2DJLw4H IeoddljF3zJQ1414mY1kYG6bDWBhPOqMNtL97CwL1GeUQS3fX.VwyKvRY3cS 9dVXft2gptZAC31iTyE8P_yrpp0cR2l93eH8bqeEEqCX8xNZQkLrXQlQVC6d bSq8nlOw5VC4.HMP.fABVaWHgVRqDhE8CnouaTHg7Od0tKkKym3yWg0OPhXX SaN8goUwJNvpeoYDlWlon22i1b6Rrd1YjDfRYdsrcAyJspei7Ho4ZDmdoJui JaamqlYlAnBgBkuDSKK2WZEOnSjyDwUpqSeIdTMvzdH9aTgloZtwEvixdsMb TSJm3g5OubagQhOnTmOi6_.1KOrgA.RvaddQqLKyZh3PaDoI79Rlt39KVQKo ol95yRrugUqSh.qk.ypnIYf9h371JtXRC8qeEfdtl9934hyfAFPhFeoFqCKX nQ68Pudu63hUm9DoQIsdV5Lo6pRmIpaDErff5nxp_xT2fghARD5yXRJcF..m TUzL1sY_8PFXRElb3wPLwLEYgOw-- Received: from [71.218.228.123] by web120102.mail.ne1.yahoo.com via HTTP; Thu, 27 Dec 2012 04:25:35 PST X-Rocket-MIMEInfo: 001.001,SSBhZ3JlZSB3aXRoIFdhbHRlci4gwqBUaGUgb25seSBwcm9ibGVtIHdpdGggYmVpbmcgYSBsaXR0bGUgb24gdGhlIGxlYW4gc2lkZSAoYXMgeW91cnMgYXBwYXJlbnRseSBpcykgaXMgdGhhdCB3aGVuIGNvbGQgdGhlIGVuZ2luZSBtaWdodCBub3Qga2VlcCBydW5uaW5nIGlmIGJyb3VnaHQgYmFjayB0byBhbiBpZGxlLCBhbmQgaXQgbWF5IHN0dW1ibGUgaWYgdGhlIHRocm90dGxlIGlzIG9wZW5lZCBhYnJ1cHRseSBmcm9tIGlkbGUgd2hlbiBjb2xkLiDCoFRoZSBwcm9ibGVtIHdpdGggYmVpbmcgcmljaCAodGgBMAEBAQE- X-Mailer: YahooMailWebService/0.8.129.483 References: X-Original-Message-ID: <1356611135.96285.YahooMailNeo@web120102.mail.ne1.yahoo.com> X-Original-Date: Thu, 27 Dec 2012 04:25:35 -0800 (PST) From: Gary Casey Reply-To: Gary Casey Subject: Re: Mixture adjustment X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-1658718958-411001126-1356611135=:96285" ---1658718958-411001126-1356611135=:96285 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable I agree with Walter. =A0The only problem with being a little on the lean si= de (as yours apparently is) is that when cold the engine might not keep run= ning if brought back to an idle, and it may stumble if the throttle is open= ed abruptly from idle when cold. =A0The problem with being rich (the 25-5-0= rpm drop is pretty rich) is that when operating at a high-elevation airpor= t=A0if you don't lean it aggressively at idle=A0it can quit. =A0Like on rol= l-out after landing. =A0BTDT. =A0Regardless, it only affects operation on t= he ground. =A0If it is running good, I wouldn't bother changing it.=0AGary = Casey=A0=0A=0AThe 25-50 RPM rise should be seen at sea level.=A0 What's you= r home airport elevation?=0A=0A(I prefer to have it on the lean side.)=0A= =0AWalter Atkinson=0AAdvanced Pilot Seminars=0A=0A=0A=0AOn Dec 26, 2012, at= 6:23 AM, Greenbacks, UnLtd. wrote:=0A=0AMy IO360 idles smoothly at 760-780= RPM.=0AI've been told that the correct mixture setting at idle has been ach= ieved when pulling mixture to full lean=0Aresults in a 25-50RPM increase be= fore the engine quits. Is this what I should be looking for?=0AI don't see = it yet so I'm thinking I should richen up the mixture a click or two until = I see the rise.=0AWhat do our resident engine experts say?=0A=0AThanks,=0A= =0AAngier Ames=0AN4ZQ ---1658718958-411001126-1356611135=:96285 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
I agree with W= alter.  The only problem with being a little on the lean side (as your= s apparently is) is that when cold the engine might not keep running if bro= ught back to an idle, and it may stumble if the throttle is opened abruptly= from idle when cold.  The problem with being rich (the 25-5-0 rpm dro= p is pretty rich) is that when operating at a high-elevation airport i= f you don't lean it aggressively at idle it can quit.  Like on ro= ll-out after landing.  BTDT.  Regardless, it only affects operati= on on the ground.  If it is running good, I wouldn't bother changing i= t.
Gary Casey 

The 25-50 RPM rise should be seen = at sea level.  What's your home airport elevation?

(I prefer to= have it on the lean side.)

Walter Atkinson
Advanced Pilot Semina= rs



On Dec 26, 2012, at 6:23 AM, Greenbacks, UnLtd. wrote:
My IO360 idles smoothly at 760-780RPM.
I've been told that the corr= ect mixture setting at idle has been achieved when pulling mixture to full = lean
results in a 25-50RPM increase before the engine quits. Is this what I should be l= ooking for?
I don't see it yet so I'm thinking I should richen up the mi= xture a click or two until I see the rise.
What do our resident engine e= xperts say?

Thanks,

Angier Ames
N4ZQ
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