Main Rotor Blades

Question 1

Dimensions

Answer 1

383.7 in long
29.25in wide
Weight: 371 lbs

Question 2

Sheath

Answer 2

Cross ply fiberglass channel
Provides airfoil contour to fwd edge of blade
Bonded to leading edge of spar
Filler w/ NOMEX honeycomb
Houses lead shot/resin in that provides balancing

Question 3

Nitrogen charged titanium spar

Answer 3

Formed to hollow tube shape
Spans length of blade from cuff to tip cap

Question 4

Titanium abrasion strip

Answer 4

Bonded to sheath
Section 240 to 362

Question 5

Nickel abrasion strip

Answer 5

Bonded to titanium abrasion
Station 262-360

Question 6

Short nickel strip

Answer 6

Station 362-tip cup

Question 7

Polyurethane abrasion strip(black)

Answer 7

Station 40 to 362

Question 8

Clear polyurethane abrasion strip

Answer 8

Rubber strip
Covers fwd edge of black

Question 9

Pocket

Answer 9

One piece nomex honeycomb core
Bonded to the spar trailing side
Formed to complete airfoil contour
Covered by bonded-on fiber glass skin

Question 10

Root and fairing

Answer 10

Composite piece
Inboard of blade
Endosed and forms an airfoil for the inboard edge pocket

Question 11

Trim tab

Answer 11

Aluminum
Bonded to trailing edge
Station 290-330
Allows adjustment to blade during testing

Question 12

Tip cup

Answer 12

10.75in long and 23.78 in across the base
Aluminum fairing assemblies riveted and bonded to an aluminum rib
Contains center rib for stiffness and tip light
Protected by nickel abrasion strip