Transient Response QDR AAE 451 Team 3 December

Transient Response QDR AAE 451 – Team 3 December 2, 2003 Brian Chesko Brian Hronchek Ted Light Doug Mousseau Brent Robbins Emil Tchilian

AAE 451 Team 3 • • Introduction Walk Around Short-Period Mode Phugoid Mode Dutch Roll Mode Spiral Mode Stable Results Control Panel Deflection Results 2

AAE 451 Team 3 Aircraft Walk Around • Wing Span = 14. 4 ft • Wing Chord = 2. 9 ft • T-Tail – NACA 0012 • A/C Length = 10 ft • Pusher • Internal Pod • Tricycle Gear • Low wing – Clark Y 3

AAE 451 Team 3 Short Period Mode • This motion involves rapid changes to the angle of attack and pitch attitude at roughly constant airspeed. Pole -14. 391 ± 1. 0079 i Natural 14. 431 (rad/s) Frequency Damping Ratio 0. 99721 4

AAE 451 Team 3 Phugoid Mode • The aircraft, at nearly constant angle of attack, climbs and slows, then dives, losing altitude while picking up speed. Pole -0. 078823 ± 0. 71828 i Natural 0. 72259 (rad/s) Frequency Damping Ratio 0. 10908 5

AAE 451 Team 3 Dutch Roll Mode • Oscillatory yaw rotation that causes differential in lift/drag of wings. – The wing with more lift causes more drag on that side – Additional yaw in direction with more drag Pole -1. 1607 ± 2. 4427 i Natural 2. 7045 (rad/s) Frequency Damping Ratio 0. 42918 6

AAE 451 Team 3 Spiral Mode • Unstable mode in which the aircraft starts a non-oscillatory turn associated with a roll and yaw, depending on which direction the initial tipping is done. Pole 0. 29086 Natural 0. 29086 (rad/s) Frequency Damping Ratio -1 7

AAE 451 Team 3 Roll Mode • When the aircraft begins to bank, the wing going down has an increased which produces more lift and thus a restoring rolling moment. Pole -25. 748 Natural 25. 748 (rad/s) Frequency Damping Ratio 1 8

AAE 451 Team 3 Stable Results 9

AAE 451 Team 3 Stable Results 10

AAE 451 Team 3 Stable Results 11

AAE 451 Team 3 Control Panel Deflection • 10° Deflection performed on each control panel individually Ex. 1 sec = 10° 1. 001 sec = -10° so return to 0° • Results of deflection plotted 12