five-blade main rotor

five-by-five

blade tip light / main-rotor blade tip light

main-rotor blade tip light blade tip light

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

main-rotor blade

main-rotor blade durability

main gear box / main rotor transmission

main rotor transmission / main gear box

oh five-hundred (5:00 am)

five-chambered arm

five-step elevator

GOTWA five point contingency plan (Going, Others, Time, What, Actions)

Five Eyes  (FVEY)

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

tail rotor blade

solid metal rotor blade

tail rotor blade angle

tail rotor blade casing

three-blade tail rotor

rotor blade

blade flat; saber flat; sword flat, flat of the blade / sword

blade de-icers / blade heating elements

blade heating elements / blade de-icers

blade horn / blade lever

aft main rotor

main rotor brake

main rotor hub

forward main rotor

main rotor noise

main-rotor (hydraulic) collective pitch actuator

main-rotor axis