Rotor Flashcards
Above what RPM is the flapping angle no longer limited?
31% N2
The purpose of the yoke assembly in the main rotor system is to ________ and ______.
Support the main rotor assembly, serve as a pitch change axis
The TH-67 tail rotor incorporates a delta hinge type hub assembly providing compensation for
Dissymmetry of the lift in the tail rotor
A bolt, washers, and a nut maybe added to the ______ to help eliminate ________ and provide span wise and chord wise balance
Dynamic balance wheel, high frequency vibrations
When a cyclic input is applied, the input (blade feathering action) occurs _________ of the rotation.
When the blade is positioned 90 degrees earlier in the plane
The tail rotor pitch horn is mounted to the blade root and is the component that _______
Changes blade pitch angle
Each TH-67 main rotor blade is manufactured with a ____ degree twist to ______ along the blade span
-10, equalize lift
Through mechanical linkage, movement of the _____ causes the main rotor system to tilt
Cyclic
The ________ and pitch horn are connected by the pitch change links/tubes on the main rotor system
Rotating swashplate
The trunnion, which attaches the main rotor hub assembly to the mast, allows the main rotor system to _____ and _____
Rotate, tilt (flap)
How is the yoke attached to the main rotor trunnion?
Pillow blocks
Weights attached to the tail rotor pitch adjust for _____
Pedal creep
At what RPM is the main rotor flapping limited to 6” maximum?
25% N2. RPM or below
The components that enable the mast to drive the rotating swashplate are the ____, ____, ____.
Collar set, idler lever, idler link
The semi-grid, under slung main rotor hub provides for the _______
Mount for two metal blades
