Discussion
Short-period damping ratios measured on four aeroplanes in a rapid manoeuvring task, for which Level 1 requires a damping ratio between 0.35 and 1.30.
| Aeroplane | Damping ratio |
|---|---|
| P | 0.28 |
| Q | 0.55 |
| R | 0.90 |
| S | 1.10 |
Which aeroplane fails the Level 1 requirement?
Answer: A
Only P, at 0.28, lies outside the band, falling short of the 0.35 lower bound and so achieving Level 2 rather than Level 1 for this characteristic. Q, R and S at 0.55, 0.90 and 1.10 are all comfortably within the band, and it is worth noting that the requirement has an upper bound as well: an overdamped short period above 1.30 feels sluggish and also fails, which is why S at 1.10 passing is not a trivial observation. Including Q would misread the lower bound.
No comment is present. Be the first to comment.
Loading…
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