Day 8-9 Progress Check 1: Nose Wheel Steering Flashcards
How is steering typically controlled in large aircraft with hydraulic nose wheel steering systems?
Using a tiller, joystick, or small wheel in the flight deck
How is hydraulic pressure applied to the nose wheel steering system in large aircraft?
Via a safety shutoff valve and metering valve
What is the purpose of the metering valve in hydraulic nose wheel steering systems?
To control the flow of hydraulic fluid to the steering actuators
Which component in small aircraft typically connects the nose wheel to the rudder pedals for steering?
Push-pull tubes
What is a common feature of vane-type dampers used in older transport aircraft?
They perform dual functions of steering and damping vibrations
What is the primary purpose of nose wheel steering systems in aircraft?
To control the direction of the aircraft during ground operations
How do shimmy dampers function in nose wheel steering systems?
They prevent rapid oscillations of the nose wheel during ground movement
What regular maintenance procedure is required for shimmy dampers to ensure optimal function?
Regularly checking for leaks and ensuring the unit is filled to capacity with fluid
What is a key characteristic of piston-type shimmy dampers?
They use hydraulic fluid forced through a bleed hole in the piston to dampen shimmy
What is the role of a safety valve in hydraulic nose wheel steering systems?
It relieves hydraulic pressure in case of failure, allowing the nose wheel to swivel freely
What is the purpose of a compensator unit in nose wheel steering systems?
To maintain pressure in the steering cylinders, allowing them to act as shimmy dampers
What is a significant advantage of non-hydraulic shimmy dampers compared to hydraulic dampers?
They offer long service life and require no fluid maintenance
What is the function of the steering control unit in large aircraft hydraulic steering systems?
It directs hydraulic fluid to the steering actuators
In large aircraft hydraulic steering systems, what limits the maximum turning angle of the nose wheel?
Follow-up linkage that returns the metering valve to a neutral position
Which system component ensures that the nose wheel remains centered during retraction?
Centering cams
