Discussion
Which of the following is not a consequence of excessive dihedral effect?
Spiral instability
A poorly damped Dutch roll
Large aileron deflections needed in a steady sideslip
A strong rolling response to gusts
Answer: C
Correct answer: Spiral instability
Spiral instability is the consequence of too little dihedral effect relative to directional stability, not too much: the fin weathercocks the nose into a developing turn faster than the dihedral can level the wings.
The other three do follow from excess. A poorly damped Dutch roll is the classic symptom; a strong rolling response to gusts follows from a large \( C_{l\beta} \); and holding a steady sideslip needs large aileron deflection precisely because the dihedral effect is fighting it.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development