Why do helicopters have top rotors?
Show answer & explanation
Answer: Spinning blades create lift
Top is the strongest point — Wrong. Rotor position isn't about structural strength. It's about creating lift above the aircraft.
Spinning blades create lift ✓ — Correct! Helicopter rotor blades are shaped like airplane wings. As they spin, they create lift by pushing air down. Tilting the rotor lets helicopters move in any direction—they're like flying fans that can change angle!
To balance the weight below — Wrong. Balance is important, but the rotor's position is about generating lift directly above the center of gravity.
More Transportation questions
- Why is it misleading to say that single-track vehicles like motorcycles mainly lean and stay stable because their wheels act like gyroscopes?
- Why does the front wheel of a leaned motorcycle often seem to find a useful steering angle without the rider holding it rigidly?
- Why can a tilted motorcycle tire help push the bike sideways through a curve instead of just rolling straight ahead?
- Why does taking the same motorcycle curve faster require noticeably more lean?
- Why does the bike-rider system need a lean angle when a motorcycle follows a steady road-speed curve?
- What actually happens just after a rider pushes the left grip forward to begin leaning a motorcycle left?