GATE_AE_2027_MOCK_03_Q50
GATE 2027 Aerospace Engineering All-India Master Mock 03 (Flight Dynamics, Controls & Space Trajectories)
MSQ · 2 Marks
Flight Mechanics & Space Dynamics • Dynamic Stability • Phugoid and Short Period Modes
Which of the following physical characteristics correctly describe the aircraft Phugoid mode?
(A) It is a long-period, lightly damped oscillation.
(B) Angle of attack (lpha) remains essentially constant during the oscillation.
(C) There is a continuous interchange between kinetic energy (airspeed) and potential energy (altitude).
(D) It involves rapid pitching oscillations at nearly constant airspeed.
Answer Key:
A,B,C
Step-by-Step Verified Solution
### Solution: The Phugoid mode is characterized by low frequency, light damping, nearly constant angle of attack (\Deltalpha pprox 0), and cyclic exchange of potential and kinetic energy. D describes the Short-Period mode. Correct: A, B, C.