Glossary
What is the mixture control?
The cockpit control that sets the proportion of fuel to air reaching the engine. Air thins as altitude increases while the fuel flow does not change on its own, so the mixture is adjusted to match. The settings for any given airplane come from its flight manual.
Also called Mixture control
That is the whole entry for now. The longer version, with the mechanics and worked examples, is still to be written. See autorotation for how those read once they exist.