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A Mathematical Model of a Single Main Rotor Helicopter for ... - Read

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APPENDIX E<br />

EMPENNAGE FORCES AND MOMENTS<br />

The expressions <strong>for</strong> the lift and drag coefficients <strong>for</strong> the vertical fin and the<br />

horizontal stabilizer are identical when referenced to a local wind-axes system <strong>for</strong><br />

the particular surface. (See appendix B.)<br />

The conditions at the stall <strong>of</strong> each surface are defined as follows:<br />

- cLM<br />

as - -<br />

a<br />

IT<br />

as = -<br />

4<br />

a1 = 1.2as<br />

as 1.<br />

IT<br />

IT<br />

as -<br />

4<br />

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