Rotor system

Question 1

Four subsystems

Answer 1

Main rotor blades
Hub
Flight controls
Bifilar vibration absorber

Question 2

What allows the blades to flap, lead, lag and move about axis for pitch changes

Answer 2

Elastomeric bearings

Question 3

Droops out?

Answer 3

70% Nr

Question 4

Droops in (seated on shutdown)

Answer 4

50% Nr

Question 5

Anti-flap restraints

Answer 5

35% Nr