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H145 > ATA 62 - MAIN ROTOR > Flashcards

ATA 62 - MAIN ROTOR Flashcards

1
Q

What type of MR is on the D2?

A

Hingless Main Rotor System

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2
Q

The MRB’s are identified how?

A

by numbers and colours

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3
Q

What is the Nominal speed of the MRH?

A

383.4 RPM

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4
Q

What is the rotor diameter of the MRB’s?

A

11m

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5
Q

The MRH to MR Mast bolts are what type?

A

x12 titanium stretch bolts

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6
Q

What is the MR Star made from?

A

Forged blank titanium alloy.

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7
Q

What is the pre-cone angle of the MR Star Arms?

A

2.5 degrees

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8
Q

Why are the MR Star Arms pre-coned?

A

To reduce control force input.

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9
Q

What is attached to the upper surface of the MR Star?

A

An oil resovior.

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10
Q

What markings are on the oil resovoir?

A

a MIN/MAX sight glass

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11
Q

What retains the torsion straps?

A

2 quadruple nuts

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12
Q

The skin plies of the aerodynamic section of the MRB are made from what?

A

Carbon Fibre

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13
Q

Can you interchange vibration absorbers between blades?

A

No, they are matched to their respective blade.

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14
Q

MRB skin is made of what materials?

A

Glass fibre and re-enforced plastic, and carbon fibre

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15
Q

The trimming surface is made of what and can it be bent?

A

Glass fibre and cannot be bent

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16
Q

The trimming tabs are made of what and can they be bent?

A

Aluminium, and they can be bent - but both tabs must be bent at the same time.

17
Q

How is the oil reservoir connected to the arms of the MRH star?

A

by internal bore holes.

18
Q

Where do the skin plies on the MRB converge and what do they create?

A

at the trailing edge to create a torsion box

19
Q

What is the purpose of the torsion box in the MRB?

A

it ensures torsional stiffness.

20
Q

How are the MRB’s connect to the blade fitting assembly?

A

by two bolts, one main that’s torques, and a secondary which is not tightened.

H145 (24 decks)

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