On 1-Apr-2004, wrote:

Yes, but think of the mixture knob as an "absolute" metering
adjustment, not a "relative" adjustment. In other words, setting the
mixture doesn't set
the air/fuel ratio... basically just the maximum amount of fuel that
can flow.


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).

-Elliott Drucker