9.5.2 The Lift Coefficient

The lift coefficient relates the AOA to the lift force. If the lift force is known at a specific airspeed the lift coefficient is obtained from Equation (9-47) and can be calculated from:

image (9-50)

In the linear region of the lift curve, at low AOA, the lift coefficient can be written as a function of AOA as shown below:

image (9-51)

Equation (9-51) allows the AOA corresponding to a specific lift coefficient to be determined provided the lift curve slope known:

(9-52)

The Relationship between Airspeed, Lift Coefficient, and ...

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