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Date: Tue, 29 Sep 1998 21:18:50 -0500
From: Snowbird <snbird@ibm.net>
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Subject: Re: Sacred Art of Mixture Control (Re: Sudent using KATANA?)
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HLAviation wrote:

> >The only time we leaned was on cross-countries--touching the
> >knob perhaps twice on 5 out of 50-odd flights
 
> I dont know who's out there instructing thse days but evertime you fly
> basically you should be leaning to propper mixture even below 3000.  
I don't know who's instructing these days either, but when I'm
flying maneuvers where I may want a full power recovery, I want
the mixture full rich below 5000 ft density altitude.  That's the
POH recommendation for full power in the planes I've flown so far.  

So flatland students who take off, start flying maneuvers as soon
as they level off, then turn around to enter the pattern, have 
little reason to be leaning *except on cross countries*.  That
was my point.  

> You may not realize why now but when you have your own plane and 
> have to buy the fuel and clean and replace 16 $18 apiece spark plugs 

The context of my post was typical student training, and why I
feel typical leaning taught to Cessna students does not represent 
some vast habit-building experience of which Katana students are
deprived.  Perhaps you disagree, but please read and respond in
context.

As it happens, I do own my own plane and fly it extensively at low
altitudes commonly used by training students in this area (doing
instrument training, out punching holes).  I buy the fuel and
calculate the fuel consumption, so I can assure you that at 
2,000-3,000 ft, the biggest factor in fuel consumption is power 
setting, as the engine requires very little leaning at those altitudes
and none at all in climb.  I also clean the spark plugs, which last
time required light brushing.  But thank you for your concern.

Snowbird


