coaxial-rotor helicopter

lateral dual rotor system / side-by-side rotor helicopter

through shaft (of upper coaxial rotor)

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

single-rotor helicopter

tandem-rotor helicopter

side-by-side rotor helicopter

tandem-rotor helicopter (twin rotors mounted longitudinally)

single rotor helicopter drone

air combat capable helicopter / air-to-air capable helicopter

ambulance helicopter / medical evacuation (MEDEVAC) helicopter

medical evacuation (MEDEVAC) helicopter / ambulance helicopter

coaxial rotors

hollow shaft (of lower coaxial shaft)

upper and lower coaxial rotors

coaxial machine gun

coaxial mounting

coaxial

brake rotor

tail rotor blade

tilt rotor aircraft

turbine disc / rotor /wheel

idle rotor

inner rotor

aft main rotor

main rotor brake

rotor support damper

anti-torque rotor

anti-torque rotor control

anti-torque rotor hub

articulated rotor

ceramet rotor plate