In what position should the mixture control be during takeoff in the Cessna 172?

During takeoff in the Cessna 172, the mixture control should be set to the "rich" position. This setting enriches the fuel-air mixture, allowing the engine to produce maximum power and performance required for a successful takeoff.

Having the mixture rich ensures that there is enough fuel mixed with the air being drawn into the engine, which is particularly important at full throttle. At lower altitudes and during takeoff, the cooler atmospheric conditions could potentially lead to a richer mixture being more effective, contributing to improved engine efficiency and power.

Additionally, while there are other positions such as lean or idle, leaning the mixture in these conditions could lead to reduced power and possibly engine performance issues, especially during critical phases of flight like takeoff where maximum thrust is essential. Full forward is often used as a term for the rich setting but usually refers to the position of the mixture control lever itself being pushed fully forward.