Main Rotor System

Question 1

The hub disc assembly and the mast assembly are the two main parts of which component?

Answer 1

The Main Rotor Head

Question 2

What is the most efficient rotor speed (NR) for the Main Rotor Head Vibration Absorber (MRHVA) to be tuned at?

Answer 2

1.04

Question 3

Which material is the Main Rotor Head (MRH) predominately made from?

Answer 3

Titanium

Question 4

What component attaches the main rotor blade sleeves to the arms of the main rotor hub disc assembly?

Answer 4

Main rotor blade sleeve tie bars

Question 5

What function is performed by the lag plane dampers on each blade sleeve?

Answer 5

Controls the rate of movement in the horizontal plane

Question 6

What must be considered when checking the indicator gap of the lag plane damper?

Answer 6

Ambient temperature

Question 7

What term is used to describe the twist in the main rotor blade which ensures there is a uniform distrubution of lift along the blades length?

Answer 7

Washout

Question 8

Why does the Wildcat have the capability to enter “negative pitch conditions”?

Answer 8

Enhances aircraft stability, whilst rotors engaged on the ground