ATA 62 - MAIN ROTOR Flashcards
What type of MR is on the D2?
Hingless Main Rotor System
The MRB’s are identified how?
by numbers and colours
What is the Nominal speed of the MRH?
383.4 RPM
What is the rotor diameter of the MRB’s?
11m
The MRH to MR Mast bolts are what type?
x12 titanium stretch bolts
What is the MR Star made from?
Forged blank titanium alloy.
What is the pre-cone angle of the MR Star Arms?
2.5 degrees
Why are the MR Star Arms pre-coned?
To reduce control force input.
What is attached to the upper surface of the MR Star?
An oil resovior.
What markings are on the oil resovoir?
a MIN/MAX sight glass
What retains the torsion straps?
2 quadruple nuts
The skin plies of the aerodynamic section of the MRB are made from what?
Carbon Fibre
Can you interchange vibration absorbers between blades?
No, they are matched to their respective blade.
MRB skin is made of what materials?
Glass fibre and re-enforced plastic, and carbon fibre
The trimming surface is made of what and can it be bent?
Glass fibre and cannot be bent
The trimming tabs are made of what and can they be bent?
Aluminium, and they can be bent - but both tabs must be bent at the same time.
How is the oil reservoir connected to the arms of the MRH star?
by internal bore holes.
Where do the skin plies on the MRB converge and what do they create?
at the trailing edge to create a torsion box
What is the purpose of the torsion box in the MRB?
it ensures torsional stiffness.
How are the MRB’s connect to the blade fitting assembly?
by two bolts, one main that’s torques, and a secondary which is not tightened.
