Aerodynamic Forces and Moments
Calculation of aerodynamic forces and moment.
blockType: SubSystem
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Path in the library: |
Description
Block Aerodynamic Forces and Moments calculates the components of the aerodynamic force and the aerodynamic moment relative to the center of gravity of the aircraft in the associated coordinate system using the following formulas.
Components of the aerodynamic force:
where
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— coefficient of longitudinal force;
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— the coefficient of normal force;
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— coefficient of lateral force;
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— high-speed pressure;
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— a characteristic square.
Components of the aerodynamic moment:
where
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— roll moment coefficient;
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— coefficient of yaw moment;
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— the coefficient of pitch moment;
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— the characteristic linear size of the aircraft;
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— the average aerodynamic chord of the wing;
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, , — coordinates of the center of gravity;
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, , — coordinates of the pressure center.
Ports
Input
#
Coefficients
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Details
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| Data types |
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| Complex numbers support |
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#
qbar
—
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Details
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| Complex numbers support |
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#
CG
—
centre of gravity coordinates
`vector 3 to 1
Details
The coordinates of the centre of gravity of an aircraft. Measured in units of length, given as a vector.
| Data types |
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| Complex numbers support |
No |
#
CP
—
centre of pressure coordinates
`vector 3 to 1
Details
The coordinates of the centre of pressure of an aircraft, given as a vector. Measured in units of length.
| Data types |
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| Complex numbers support |
No |
Parameters
Main
# Reference area — characteristic area
Details
The characteristic area of an aircraft. It is measured in units of area. For aircraft, the wing area is usually taken as the characteristic area.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Reference span — mean aerodynamic chord of the wing
Details
The average aerodynamic chord of a wing. Measured in units of length.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
# Reference length — characteristic linear dimension
Details
The characteristic linear dimension of an aircraft. It is measured in units of length. For aircraft, the characteristic linear dimension is usually taken as the wingspan.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |