Rotor Systems - NATOPS CH. 2.2 Flashcards
What type of rotor head do we have?
Fully articulated
What component enables the blades to lead, lag, flap, etc?
Elastomeric bearings
How is the rotor head dampened?
Main rotor dampers that are supplied with nitrogen pressurized hydraulic fluid.
Where is the reservoir for the hydraulic fluid used to dampen?
1 gallon reservoir inside the main rotor mast.
WARNING: A sheared _________ _________ _____ will instantaneously deplete the reservoir, degrading all four main rotor dampers, and may result in _________ _________ or unusual vibrations on deck.
Hydraulic damper line
Ground resonance
How is the rotor controlled?
Flight control hydraulic servos, which move control rods attached to the swashplate assembly.
How does the rotating swashplate transmit flight control inputs to the main rotor?
Four pitch control rods
At what speed do the antiflspping restraints get pulled out?
35% Nr
At what speed do the droop stops get pulled out? When do they seat?
70% Nr
Approximately 50% Nr
What two things do the 20 degree swept tips on the blade provide?
Sound attenuation and increased rotor blade efficiency
The spar of the main rotor blade is pressurized with what?
Nitrogen
The tail rotor indexing system positions the tail rotor blades during pylon fold operations and prevents the tail rotor from windmilling in winds up to _______.
60 knots
CAUTION: Failure to hold the gust lock switch in the LKD or UNLK position for a minimum of ____ seconds during operation may result in a partially engaged gust lock without a gust lock caution, causing damage when the rotor is engaged.
5 seconds
What does the AVCS system consist of?
AVCC
Ten feedback accelerometers
VCAS
What does the VCAS system contain?
Electronics Unit
5 force generators
