Definition: Mixture

This is the ratio of fuel/air which is controlled by the mixture lever. A pilot is able to control the amount of fuel that is mixed with the air and this is useful when climbing to high altitudes where there is less air, which if the pilot does nothing, the mixture will be rich, or have more fuel than required and could lead to rough engine running, so the pilot would lean the mixture. When descending from a high altitude, the pilot would richen the mixture, or increase the amount of fuel to air ratio as there is more air closer to MSL than at altitude. If the pilot forgot to enrich the mixture, the engine could stop because of fuel starvation.

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Mixture

This is the ratio of fuel/air which is controlled by the mixture lever. A pilot is able to control the amount of fuel that is mixed with the air and this is useful when climbing to high altitudes where there is less air, which if the pilot does nothing, the mixture will be rich, or have more fuel than required and could lead to rough engine running, so the pilot would lean the mixture. When descending from a high altitude, the pilot would richen the mixture, or increase the amount of fuel to air ratio as there is more air closer to MSL than at altitude. If the pilot forgot to enrich the mixture, the engine could stop because of fuel starvation.

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