From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: TSIO 550 Rich or Lean of Peak?
To: lml
Date: Tue, 03 Jun 2003 19:09:55 -0400
Message-ID: <web-2401042@logan.com>
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Posted for "JJ JOHNSON" <JJJOHNSON@ACCESSCOMM.CA>:

Shannon,

      I in no way want to sound like the expert here, nor do I wish to flame
you. It's been my experience however that when in an overshoot situation,
the last thing I [personal preference here-as well as training] want to be
doing is pushing more levers than I have to, if your gear is out (it should
be) then there is that to get moving as well as flaps as required. I've only
flown a 550 [normal breather] a couple of times, but on the turbo'd variety
I use a min of a 3 second power application [plus watch for that overboost].
Maybe that's why I've never experienced this torque you speak of.  If your
in a super low and slow situation, I'd think that you'd want as much power
[smoothly applied] as was possible to overcome drag and get ahead of the
power curve again. Sure there may be a significant yaw from adding full
power, but I'm of the opinion that I'd rather have the power than not.
Second of all, wouldn't there be more torque from a deeper pitch prop
setting rather than a finer pitch setting? It would seem to me that its
'grabbing' more air and there-by creating a greater torque effect. As far as
leaning, I guess its what-ever you want to do. I'm no expert as far as this
is concerned, but I do know I won't hurt my engine w/ a full rich/ full
power application. Would I hurt my engine w/ a full power/lean of peak
mixture-- I dunno.. so, I stick w/ what I know. Maybe someone can answer
this but, wouldn't you experience some detonation when passing from -LOP
thru Total lean to ROP at absolute full power?? Even if its only for a
couple firing cycles-a couple is to many IMHO.  On final, I go mixture rich,
props up-Hand to the throttle. I guess its all just preference but I like to
think I'm ready for that flock of geese coming across the approach path {out
of the sun}, or the idiot that just taxi'd to position w/out clearance, I've
had both and wanted ALL the power I could get, as soon as I could get it!
Again like I say, I'm no expert!!  And it has been a year or two since I've
flown a 550.

Jarrett Johnson