Mixture--science vs witchcraft?

On Thu, 23 Aug 2007 08:44:27 -0700, wrote:

On Aug 18, 3:43 pm, "Douglas Paterson"
wrote:
Still getting to know my new baby (1990 TB-20, normally aspirated 250hp
Lycoming IO-540). I imagine my question here must apply to most non-turbo,
non-FADEC pistons (though I gather there's some sort of altitude compensator
on some airplanes' engines?). I live in Colorado, which means routine
high-elevation airport ops.

The people who manufacture that engine, and who have lots to
lose if it quits on you, have a procedure he

http://www.lycoming.textron.com/supp...fs/SI1094D.pdf

Dan


That Lycoming document describes leaning for takeoff at high DA for
these cases:

- fixed pitch - lean for max rpm
- constant speed but no engine instrumentation - lean with smooth
operation of the engine as a deciding factor

What if I have a CS prop plus EGT, MP and fuel flow instrumentation?






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