NATOPS Rotor & Transmission Flashcards
The Elastomeric bearings allow the blades to?
Flap, lead, lag and move about its axis for pitch changes
Anti-flapping restraints are out at ______.
Droops go in at ________ and out at __________
35% NR
50% NR
70% NR
The rotor blade tips are swept 20° to
Provide sound attenuation
And
Increased rotor blade efficiency
Tail rotor is
A crossbeam flexible spar canted 20° upward and provide 2.5% lift in a hover
The tail rotor indexing system:
Positions blades during pylon fold and
prevents the tail rotor from windmilling in winds up to 60kts when folded.
Whenever locking or unlocking the Gust Lock the switch must be
Held in position for at least 5 seconds
AVCS IBIT shall only be initiated when?
It corrects for the ___________ vibration
when Rotors are static to avoid damage to components
4 per revolution
What is primary function of transmission?
Secondary?
Take power from the engines, reduce the RPM, and transfer it to the main and tail rotors
Drive electric and hydraulic power
MGB has:
3° forward tilt
2 accessory mods
2 input mods
1 main module
The utility hydraulic system is mounted ____________.
On the right rear quadrant of main transmission
Diaphragm coupling allows
For slight misalignment of engine output shaft
Freewheeling unit allows
The transmission to disengage from the engine when NR exceeds NP (autorotation)
If loud whining noise is heard during rotor engagement you should
Shut down and trouble shoot. It could be a failure of the diaphragm coupler.
IGB does what?
Reduces shaft speed and changes angle of drive
Tail and IGB gearboxes are
Splash lubricated and provide gear reduction and change and angle of drive.
The main transmission oil system is
Wet sump
Also used by the AC generators
It is AIR cooled
MAIN TRANSMISSION OIL HOT caution comes on when?
117° C