wrote:
: I'm afraid this doesn't make any sense. The mixture control DOES control
: air/fuel mixture -- hence the name. If it simply controlled fuel flow the
: mixture would change radically every time you touched the throttle. In
: fact, what is controlled by the red knob (mixture) is the ratio of air
: volume to fuel volume. As density altitude increases (i.e. air density
: decreases), a greater volume of air is needed to mix with a given volume of
: fuel for optimal combustion, so one has to lean the mixture (increase air
: volume/fuel volume ratio).

OK... I'll concede that I oversimplified a bit.... The air/fuel ratio (as
in mass-air/fuel, like 12.5:1, 14:1, etc) does change when the throttle is moved.
Even without changing altitude, if the mixture is set to peak EGT, for example,
increasing MP by an inch will lean the engine (unless it's starting to enter the
full-throttle fuel enrichment regime). It's probably somewhere between the two
extremes (absolute fuel vs. relative fuel).

-Cory
--
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* The prime directive of Linux: *
* - learn what you don't know, *
* - teach what you do. *
* (Just my 20 USm$) *
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