Discussion
A dorsal fin fitted at the root of the vertical tail chiefly
Answer: C
A dorsal fin is a large-sideslip device: it generates a vortex that keeps flow attached over the fin and preserves the yawing moment with sideslip at angles where a bare fin would stall, which is what prevents rudder lock and improves spin resistance. At the small sideslip angles of a Dutch roll it does very little, since the fin is unstalled there anyway. Reducing effective dihedral is what a ventral fin does. The roll mode depends on wing roll damping, which a dorsal fin cannot touch.
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