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Old 10-23-2018, 10:32 AM
lr172 lr172 is offline
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 3,703

Originally Posted by Carl Froehlich View Post
Not exactly.

A MP increase by ram air is the same as adding throttle to increase MP. Your servo will add more fuel. Effect on mixture will be in the grass (assuming constant altitude).

From my experience, the servo doesn't compensate in a linear fashion when manually leaned with the mixture control. Next time you are in cruise, add a bit of throttle. You'll notice that you get leaner and leaner the more you add. The mixture adjustment is not linear with air flow based fuel control in the servo. Increases in throttle or MP seem to require enriching the mixture to maintain the same AFR.
RV-6A / IO-320, Flying as of 8/2015
RV-10 in progress

Last edited by lr172 : 10-23-2018 at 11:03 AM.
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