Rotors

Question 1

Rotor system

Answer 1

rotor system consists of a four bladed, fully articulated main rotor and a four bladed tail rotor assembly with two teetering rotor hubs.

Question 2

Swept tip

Answer 2

Reduces effects of compressibility

Question 3

Blades

Answer 3

Fully composite with mesh honey comb

Question 4

Main Rotor Head

Answer 4

The main rotor head allows the blades to flap, feather, lead, and lag independently.

Question 5

Pitch Housing

Answer 5

The pitch housing permits blade pitch changes in response to flight control movements transmitted through the swashplate

Question 6

Feather bearings

Answer 6

provides the pivot point for the main rotor blade flapping and feathering action and provides the mounting point for the pitch housing assembly.

Question 7

Strap Pack

Answer 7

The strap pack assemblies permit flapping and feathering motion and transmit centrifugal loads from the main rotor blades to the hub.

Question 8

Lead Lag Links

Answer 8

Lead-lag links are connected to the outboard end of each pitch housing and are secured in place by a pin and two bearings allowing the links to move horizontally. The pin goes through the “V” portion of each strap within the pitch housing.

Question 9

Lead Lag Damper Assembly

Answer 9

The damper assemblies control the lead-lag motion of the rotor blades and prevent mass imbalance (unequal blade spacing). “Horizontal movement”

Question 10

Blade attachment (main)

Answer 10

The blade attachment pin assemblies attach and secure the main rotor blade to the leadlag link of the main rotor head.

Question 11

TAIL ROTOR ASSEMBLY

Answer 11

The tail rotor is a semi-rigid, teetering system.

Question 12

Tail Rotor Blades

Answer 12

Two pairs of blades, each pair fastened to its own delta hinged hub, provide anti-torque action and directional control. Each blade has one stainless steel spar and two aluminum spars. Doublers, adhesive, and rivets attach the blade to the blade root. Brackets on the root fitting hold chord-wise bal-ance weights. Span-wise balance weights are installed in blade tip caps.

Question 13

Tail Rotor Fork

Answer 13

A titanium fork houses four elastomeric teetering bearings and drives the rotating swashplate through an attached scissors assembly.

Question 14

Elastomeric bearings

Answer 14

Elastomeric bearings (a) The elastomeric bearings are bonded to the outboard end of the forks and allow the hubs to teeter on the forks.

Question 15

Tail rotor spins how much faster

Answer 15

4 times faster than main rotor

Question 16

Blade diameter

Answer 16

49 feet