9-2 - Static stability o o o o Initial response to a...

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Static stability o Initial response to a disturbance o Positive- tendency to return to trimmed position o Neutral- tendency to stay in new position o Negative- tendency to deviate farther from original position Dynamic stability o Effect of stability with time o Positive/Negative/Neutral An airplane must have positive stability or it would be too difficult to fly Stability is compromised to achieve maneuverability (acrobatic flight) Longitudinal stability o Ability to maintain constant pitch o Achieved by relationship between CG and CP Thrust vector to CG o Nose goes low o Increase in airspeed and changes AOA, increases down load on horizontal axis o Nose goes high Lateral stability o About longitudinal axis o Wings stay level or return to level Dihedral Speep back
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High keel effect Pendulum effect o Low wing results in side slip. This uses the following to achieve lateral stability Dihedral Swept wing
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This note was uploaded on 03/03/2010 for the course AERF 1103 taught by Professor Visser during the Fall '08 term at LeTourneau.

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9-2 - Static stability o o o o Initial response to a...

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