GATE_AE_2027_MOCK_03_Q24
GATE 2027 Aerospace Engineering All-India Master Mock 03 (Flight Dynamics, Controls & Space Trajectories)
MCQ · 1 Mark
Flight Mechanics & Space Dynamics • Dynamic Stability • Dutch Roll, Spiral & Roll Modes
Spiral divergence instability in lateral-directional dynamics is characterized by:
(A) A slow, non-oscillatory aperiodic divergence in bank angle and heading
(B) A violent high-frequency coupled roll-yaw oscillation
(C) Rapid pure pitch oscillations
(D) Immediate catastrophic flutter
Answer Key:
A
Step-by-Step Verified Solution
### Solution: The spiral mode is an aperiodic (real eigenvalue) mode that, if unstable, results in a slow gradual spiral dive with increasing bank angle and heading change. Correct: A.