Calculate Elevator Deflection Angle to Trim the Airplane

 Method to Calculate the Elevator Deflection Angle necessary to Trim the Airplane at a given Velocity

• Calculate Moment about the Center of Gravity (CG)

• Calculate Moment about Aerodynamic Center

• Calculate location of Aerodynamic Center and Value of Cmac

• Calculate Longitudinal Static Stability of Airplane

• Calculate Cmcg of Airplane

• Calculate Neutral Point of Airplane

• Calculate Static Margin of Airplane

• Calculate Elevator Deflection Angle to Trim the Airplane

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Elevator Deflection Angle Necessary to Trim the Airplane

In order for calculate the Elevator Deflection angle necessary to trim the airplane at a given velocity we must first know the value of Wing area in meters^2.

Also we need to  know the Airplane Weight in Newtons.

The velocity at Sea-level in meters/second

Elevator Control Effectiveness

The Lift Slope.

The values of Moment Coefficient, Cm0

Moment about the Center of Gravity d Cm,cg/d alpha

The value of Vh

Performing the calculation, the value of the Lift Coefficient is computed. The delta trim angle value is computed. Furthermore, it is also computed that whether the Elevator is to deflected downward or upwards.

Download Free Program to Calculate the Elevator Deflection angle necessary to trim the airplane.