Chapter 11 - Main Rotor Drive System Flashcards
What is the purpose of the main rotor drive/transmissions system?
Combines the power output from the 3 engines to drive the main and tail rotors aswell as the aircraft accessories
Which engine can drive the accessory gearbox without turning the rotors?
What allows it to do this?
No.1 Engine
Freewheel Actuators
What does the No.2 Engine drive?
Main gearbox only
What is autorotation?
When the main rotor drive system allows the main rotor to drive some of the aircraft accessories in order to ensure safe landing during an emergency
How many struts are attached to the main gearbox?
8 struts
What angle do the ACSR struts give the MGB?
4 degrees forward
What do the 4 horizontal struts connected to the MGB counteract?
torque from the mast
What does the MGB lubrication system consist of?
2 identical and independent systems
Where are the oil pumps located? (MGB)
No. 1 oil pump - fwd left side of the MGB
No. 2 oil pump - right side of MGB Lower housing
How many freewheel actuators are there?
2
how many free wheel units are there all together?
5
2 - actuated
3 - non-actuated
What do the actuated freewheels allow for?
The selection of different drive modes for the transmission system
Where are the freewheel actuators located?
No.1 and No.3 engines power take-off
Where does the AGB transmit its power from?
MGB or No.1 Engine via the freewheel actuator
How many lubrication systems are there for the AGB?
One independent system
