Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sat, 18 Dec 2004 13:46:40 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m19.mx.aol.com ([64.12.137.11] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 572249 for lml@lancaironline.net; Sat, 18 Dec 2004 12:48:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.11; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m19.mx.aol.com (mail_out_v37_r3.8.) id q.dd.1c1da2a4 (3310) for ; Sat, 18 Dec 2004 12:47:57 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Sat, 18 Dec 2004 12:47:57 EST Subject: Re: [LML] Re: LNC2 Forward Facing Induction X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1103392077" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1103392077 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/18/2004 10:58:44 A.M. Central Standard Time, Christopher.Zavatson@udlp.com writes: Here is another factor to throw into the mix: Calibration of the MP gauge. A gauge that is off even a little can make one system look a lot better or worse than another. I own two different MP gauges that did not agree with each other. Using annually calibrated test equipment, I determined that one was right on and the other was way off.(both were new, so much for assuming new=calibrated) A gauge of unknown calibration can still do a good job showing the before and after comparison of an aircraft mod. I just wouldn't put too much faith in the absolute numbers. A small discrepancy in the MP reading could easily be misinterpreted as a large loss of dynamic pressure recovery. So many details..... Chris, I agree completely. Let's race sometime - but you must give me a head start. Hey, how about in flight calibration of the airspeed indicator? I forgot to mention that in my original missive, too. My friend Arnie (rammed IO 360, Race #96) was going up to do some tests but was not happy when I asked him to record Baro setting, MAP before engine start, OAT, Airspeed, Altitude, MAP, RPM, fuel flow, yada, yada, yada........... I have considered getting a calibrated pressure sensor and then plumb it into switchable pressure sources: static, manifold, upper and lower cowl, blood, etc. Just to see if I am achieving the theoretical values. Now, for a small blower, capable of just a few inches at 8000 feet.....Mmmmmm, Mmmmmm, Mmmmmm! Scott Krueger AKA Grayhawk N92EX IO320 Aurora, IL (KARR) Some Assembly Required Using Common Hand Tools To make a few good holes! -------------------------------1103392077 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/18/2004 10:58:44 A.M. Central Standard Time,=20 Christopher.Zavatson@udlp.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Here is=20 another factor to throw into the mix: Calibration of the=20 MP
gauge. A gauge that is off even a little can make one system l= ook=20 a lot
better or worse than another.
I own two different MP gauges th= at=20 did not agree with each other. Using
annually calibrated test=20 equipment, I determined that one was right on
and the other was way=20 off.(both were new, so much for assuming
new=3Dcalibrated)
A=20= gauge=20 of unknown calibration can still do a good job showing the
before and a= fter=20 comparison of an aircraft mod. I just wouldn't put too
much faith= in=20 the absolute numbers. A small discrepancy in the MP
reading could= =20 easily be misinterpreted as a large loss of dynamic
pressure=20 recovery.
So many details.....

Chris,

I agree completely. Let's race sometime - but you must give me a=20= head=20 start.

Hey, how about in flight calibration of the airspeed indicator? I= =20 forgot to mention that in my original missive, too.

My friend Arnie (rammed IO 360, Race #96) was going up to do some tests= but=20 was not happy when I asked him to record Baro setting, MAP before engine sta= rt,=20 OAT, Airspeed, Altitude, MAP, RPM, fuel flow, yada, yada,=20 yada...........

I have considered getting a calibrated pressure sensor and then plumb i= t=20 into switchable pressure sources: static, manifold, upper and lower cowl, bl= ood,=20 etc. Just to see if I am achieving the theoretical values.

Now, for a small blower, capable of just a few inches at 8000=20 feet.....Mmmmmm, Mmmmmm, Mmmmmm!

Scott Krueger=20 AKA Grayhawk
N92EX IO320 Aurora, IL (KARR)

Some Assembly Required=20
Using Common Hand Tools

To make a few good holes!

-------------------------------1103392077--