In a message dated 5/12/2005 10:21:35 A.M. Central Standard Time,=20 walter@advancedpilot.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>As it=20 turns out, this is a major effect. You must quantify how rich
an= d=20 how lean for the second statement to be accurate. There are some=20
rich mixtures that burn slower than some lean mixtures. As a mat= ter=20 of
fact, 40dF ROP is the fastest burn rate mixture.

The charts=20= you=20 posted are true for a given mixture. As the mixture
changes, the= =20 chart values would change. Mixture has a major effect on
the=20 effective timing... which is the only thing we really care=20 about.

Yeah, well I remember a GAMI chart that shows a broad range of timing w= ith=20 little or no effect on destruction. I don't have any problem with=20 self-controlling the last knob (mixture) in the "best power" combo alth= ough=20 I would prefer some useful info from something like an exhaust O2 sensor, ma= ss=20 airflow sensor, temperature sensor - all helping with data to arrive at= =20 some non-destructive highest and best power setting for the=20 extant environmental and operating conditions. All I have to do i= s=20 figure out what "is" is. Maybe I need a theta-beta-zeta cylinder wall=20 distortion sensor.

OK, 40F ROP is the fastest burn rate. What is a non-destructive L= OP=20 slower rate and what is the timing spread contribution (even a rule of thumb= =20 would do) -- or do I have to deduce this by myself in the "flight=20 experimental" mode? Half the EI folk don't want to reveal the timing=20 curves while, at least in one case, with enough work one can discover it.

BTW, Some of us are still waiting for something like a real FADEC, PRIS= M,=20 EPIC, OPUS, ERATO, CROSSWORD PUZZLE or whatever - - (kinda like a useful=20 diesel), but they never seem to quite arrive and deliver the=20 desired performance. Of course, one would expect these things to=20= be=20 developed in the "experimental" field before someone tries to jam another fi= x-up=20 on a Bonanza.

I guess I am going to try things at ROP first - then LOP over a string=20= of=20 airports.

I like this stuff, it tears at my orderly life.

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Training is no substitute for fear,risk analysis and=20 judgement.
Recognize the links in the chain of errors before the last lin= k=20 joins to the anchor.
In aviation, as in life, nothing fixes itself.
Th= ere=20 ain't no tow truck when you are positive=20 AGL.

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