The GATE Grind

GATE Flight Mechanics & Space Dynamics: Static stability: stability and control derivatives, longitudinal, directional and lateral stability, hinge moments and stick forces – Previous Year Questions

11 GATE previous year questions on Static stability: stability and control derivatives, longitudinal, directional and lateral stability, hinge moments and stick forces (Flight Mechanics & Space Dynamics, Aerospace Engineering) with answers and explanations, from every paper.

  1. GATE 2021 AE Q23 (1 mark, Multiple choice) – The shown pitching-moment coefficient versus angle-of-attack plot indicates
  2. GATE 2021 AE Q34 (1 mark, Numerical answer) – A twin-engine airplane at 100 m/s and density 1.225 kg/m³ has S=50 m², b=10 m, engine thrust 8000 N and lateral engine arm 5 m. Right engine fails.…
  3. GATE 2021 AE Q46 (2 marks, Multiple select) – Which static-stability statements are correct?
  4. GATE 2021 AE Q65 (2 marks, Numerical answer) – An aircraft has wing area 350 m², chord 9 m, wing lift slope 0.1 per degree, CG at 30% chord and wing aerodynamic center at 25% chord. Tail area is 80…
  5. GATE 2022 AE Q19 (1 mark, Multiple choice) – Regarding the horizontal tail of a conventional airplane, which one of the following statements is true?
  6. GATE 2023 AE Q19 (1 mark, Multiple choice) – For a longitudinally statically stable aircraft, which one of the following represents the relationship between the coefficient of pitching moment…
  7. GATE 2026 AE Q23 (1 mark, Multiple select) – Which of the following statements is/are TRUE about the stability of an aircraft?
  8. GATE 2025 AE Q23 (1 mark, Multiple choice) – For a general aviation airplane, which one of the following has a destabilizing effect on its static roll stability?
  9. GATE 2025 AE Q25 (1 mark, Multiple choice) – To achieve longitudinal static stability of a general aviation airplane, which one of the following conditions should be satisfied?
  10. GATE 2025 AE Q38 (2 marks, Multiple select) – A general aviation airplane is initially in steady and level flight. The stability coefficient C m q (C m is the airplane pitching moment coefficient…
  11. GATE 2024 AE Q48 (2 marks, Multiple select) – For an airplane having directional / weathercock static stability, which of the following options is/are correct? (B) The variation of yawing moment…