Coupling Factor due to Horizontal Tail or Canard Moment Arm

This factor accounts for the tail down-load to trim, or for the interference of the canard up-load to trim on the wing.

Suggested Values:

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..\Images\INFO0972_wmf.gif

Short Coupled Aircraft

<3

1.10

Long Coupled Aircraft

>5

1.05

where:

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is the X-distance between the horizontal tail aerodynamic center and the aircraft center of gravity.

..\Images\INFO0974_wmf.gif

is the X-distance between the canard aerodynamic center and the aircraft center of gravity.

..\Images\INFO0975_wmf.gif

is the wing mean geometric chord.