Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Wed, 29 Dec 2004 21:38:06 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 583657 for lml@lancaironline.net; Wed, 29 Dec 2004 19:06:21 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v37_r3.8.) id q.12c.5423a29a (4410) for ; Wed, 29 Dec 2004 19:05:48 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <12c.5423a29a.2f04a05c@aol.com> X-Original-Date: Wed, 29 Dec 2004 19:05:48 EST Subject: Re: [LML] Re: airspeed vs. power X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1104365148" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1104365148 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/29/2004 5:32:32 P.M. Central Standard Time, walter@advancedpilot.com writes: MP changes result in about a 3.5% change in Mass air flow per inch of MP and the mixture may not follow closely, depending on the engine. That means that the effects of 1" MP and 100 rpm changes are not the same. The change of 100 rpms has about 70% of the change of 1" MP. Walter, Thanks for the detailed explanation of the enrichment feature. Apparently that works even though the mixture has been leaned? At some opportunity I will do a further testing where I reduce both throttle and RPM another increment. I guess the difference between 3 and 4 knots is 75% - I will try to remember to switch the GPS to Kilometers for greater accuracy (assuming I can stay in the same air mass). To repeat, my point was for a gross diagnostic flight test of the MAP sensor. I think I used the word similar power, not "same." Scott Krueger AKA Grayhawk Lancair N92EX IO320 Aurora, IL (KARR) -------------------------------1104365148 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 12/29/2004 5:32:32 P.M. Central Standard Time,=20 walter@advancedpilot.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>MP=20 changes result in about a 3.5% change in Mass air flow per inch of
MP=20= and=20 the mixture may not follow closely, depending on the engine. 
Tha= t=20 means that the effects of 1" MP and 100 rpm changes are not the=20
same.  The change of 100 rpms has about 70% of the change of 1"=20 MP.
Walter,
 
Thanks for the detailed explanation of the enrichment feature. =20 Apparently that works even though the mixture has been leaned?
 
At some opportunity I will do a further testing where I reduce both=20 throttle and RPM another increment.  I guess the difference between 3 a= nd 4=20 knots is 75% - I will try to remember to switch the GPS to Kilometers f= or=20 greater accuracy (assuming I can stay in the same air mass).  To=20 repeat, my point was for a gross diagnostic flight test of the MAP=20 sensor. I think I used the word similar power, not "same."=20
 
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 Aurora, IL=20 (KARR)

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