Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sat, 12 Mar 2005 22:44:40 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 790977 for lml@lancaironline.net; Sat, 12 Mar 2005 22:14:28 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m28.mx.aol.com (mail_out_v37_r3.8.) id q.99.5a0e9758 (16633) for ; Sat, 12 Mar 2005 22:13:35 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <99.5a0e9758.2f6509df@aol.com> X-Original-Date: Sat, 12 Mar 2005 22:13:35 EST Subject: Re: [LML] Re: Walter - Target EGT query X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1110683615" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1110683615 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 3/12/2005 7:46:19 P.M. Central Standard Time, marv@lancaironline.net writes: Using 1290-1310 is fine. What I don't understand is why the EGT is climbing as you climb. Walter, If one assumes no ram air, one would expect the EGT to drop as the mixture becomes richer with the altitude gain. I think, in my case, initially as speed increases after takeoff the induction ram air actually leans the mixture for a while until the altitude gain overcomes the ram effect and the EGT starts dropping below the target value. Rotation starts at 70 KIAS and climb occurs at 135-140 KIAS. I get the same effect (assume leaning in the climb to the fixed target EGT) when I level out and speed increases to 175-180 KIAS (Still WOT, 2600 RPM until cruise speed attained) - that is, EGTs increase and I enrichen the mixture at bit to best power with a resulting reduction in EGTs. I don't know exactly how the 4 air tubes in the throttle body throat precisely affect the fuel delivery at WOT other than they are measuring the induction air and adjust the fuel flow. Note also that my injector atomization air is supplied by a separate ram air "pitot." Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Fair and Balanced Opinions at No Charge! Metaphysical Monologues used at your own Risk. -------------------------------1110683615 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 3/12/2005 7:46:19 P.M. Central Standard Time,=20 marv@lancaironline.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Using=20 1290-1310 is fine.  What I don't understand is why the EGT is=20 climbing
as you climb. 
Walter,
 
If one assumes no ram air, one would expect the EGT to drop as the mixt= ure=20 becomes richer with the altitude gain.  I think, in my case, initially=20= as=20 speed increases after takeoff the induction ram air actually leans= the=20 mixture for a while until the altitude gain overcomes the ram effect and the= =20 EGT starts dropping below the target value. Rotation starts at 70=20= KIAS=20 and climb occurs at 135-140 KIAS. 
 
I get the same effect (assume leaning in the climb to the fixed ta= rget=20 EGT) when I level out and speed increases to 175-180 KIAS (Still WOT, 2600 R= PM=20 until cruise speed attained) - that is, EGTs increase and I enrichen the mix= ture=20 at bit to best power with a resulting reduction in EGTs. 
 
I don't know exactly how the 4 air tubes in the throttle body throat=20 precisely affect the fuel delivery at WOT other than they are measuring= the=20 induction air and adjust the fuel flow.  Note also that my=20 injector atomization air is supplied by a separate ram air "pitot."=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Fai= r=20 and Balanced Opinions at No Charge!
Metaphysical Monologues used at your=20= own=20 Risk.

-------------------------------1110683615--