Power train and rotor Flashcards
What degree tilt in main transmission and why
3 degrees, helps relieve airframe stress in forward flight
What are the 5 main transmission modules
Main mod, 2 input modules, 2 accessory mods
What are some of the components on the accessory modules that pertain to this set
Low oil pressure sensor for transmission, NR sensors, mounting pads for generators and HYD pumps
Where specifically is the pressure switch for the transmission located
Left accessory module
Main transmission oil capacity?
7 gallons
What is the difference between the rotor speed sensors?
Left (#1 side) provides data to DEC’s for transient droop compensation
Right (#2 side) provides data to DCU for EICAS to display
When does the MAIN XMSN PRESS caution kick?
When pressure drops to 14 psi
How long after shutdown to check xmsn oil dip stick on cold side?
2 hours.
What is the xmsn bypass indicator in the cabin actual for?
for the xmsn oil filter bypass
Where is the transmission oil pressure sensor?
Where is the trans oil pressure switch, how do these differ?
top/aft of the main mod, left of the tail rotor drive shaft
(In the pneumatic/fuel compartment, its the big cannon plug just left of the rotor brake wear indicators)
front side of the #1 accessory mod, on the edge of the generator. The switch generates the EICAS caution
Where are the main mod and input mod chip detectors?
Bottom aft side of the main mod, where the bypass indicator is
What does CHIP IBIT FAIL caution (also on the FMS air vehicle status page) actually mean?
One of the chip detectors has failed its built in test (BIT).
-This is in the FRC but it has no corrective action. Flyable?
-Test to find out which one.
Where are sections 1, 2 and 3 of the driveshaft?
1 is the short chonk in the fuel/pneumatic compartment
2 is the entire rest of the driveshaft except for
3 is the last section above the tail, that adjoins with intermediate gearbox
Where is the section 4 drive shaft?
Between the intermediate and tail rotor gear box
How long can the intermediate gearbox and tail rotor gearbox run with a loss of all oil?
30 minutes
What connects the primary servos to the rotor system?
The lateral, aft, and forward control rods
What does the swashplate do?
Transmit control inputs from the primary servos/control rods to the 4 pitch control rods
Swashplate assembly
A stationary and rotating disc. Three major areas
-Swashplate bearing
-Uniball bearing
-Controls
What that swashplate bearing do?
Separates stationary and rotating swashplates
What is the spindle module?
conical assembly where blades attach to hub. contains elastomeric bearings
What is the anti flap assembly?
4 spring loaded locks on the top of each spindle module, prevent flapping at NR below 35%
Whats a lead stop?
device on forward edge of elastomeric bearing endplate. limits lead of blades as rotor brake is applied
What do dampers do?
limit lead/lag motions (hunting) keeping blades in proper position to one another
Allow for 17 degree lag, 3 degree lead
tip cap angles
20 degree droop, 30 degree sweep
bifilar purpose
Absorbs vibrations, extends other component life
Whats T/R QUAD FAIL mean
your quadrant cables connecting the tail rotor control are snapped.
Check controllability.
