Podcast
Questions and Answers
What is the primary concern when bleeding power brakes in an aircraft?
What is the primary concern when bleeding power brakes in an aircraft?
- Ensuring the correct type of fluid is used
- Checking for any signs of fluid leakage
- Using the correct bleeding procedure for the emergency system
- Following the applicable maintenance manual in detail (correct)
What is the purpose of a steering system in an aircraft?
What is the purpose of a steering system in an aircraft?
- To control the altitude of the aircraft
- To control the direction of movement during flight
- To control the speed of the aircraft
- To control the direction of movement while taxiing (correct)
What type of fluid is commonly used in an aircraft's hydraulic system?
What type of fluid is commonly used in an aircraft's hydraulic system?
- Synthetic MIL-H-5606 fluid
- Mineral-base MIL-H-83282A fluid
- Phosphate-ester-base synthetic fluid such as Skydrol
- All of the above (correct)
What type of steering system is typically found on small aircraft?
What type of steering system is typically found on small aircraft?
What is the purpose of bleeding the power brake system?
What is the purpose of bleeding the power brake system?
What is a common component found in power brake systems that requires special consideration during bleeding?
What is a common component found in power brake systems that requires special consideration during bleeding?
What is the purpose of the master cylinder in a power brake system?
What is the purpose of the master cylinder in a power brake system?
What is the most popular brake for modern light aircraft?
What is the most popular brake for modern light aircraft?
What is the function of the calliper in a single disc brake?
What is the function of the calliper in a single disc brake?
What type of brake has the disc keyed into the wheel and free to move in and out as the brake is applied?
What type of brake has the disc keyed into the wheel and free to move in and out as the brake is applied?
What is the purpose of the disc clips in a single disc brake?
What is the purpose of the disc clips in a single disc brake?
What forces the brake piston onto the movable lining and against the disc in a single disc brake?
What forces the brake piston onto the movable lining and against the disc in a single disc brake?
What is the function of the anchor bolts in a single disc brake?
What is the function of the anchor bolts in a single disc brake?
What is the purpose of the hardened steel drive keys in a single disc brake?
What is the purpose of the hardened steel drive keys in a single disc brake?
In a single disc brake, where is one of the linings fixed?
In a single disc brake, where is one of the linings fixed?
What happens to the tail wheel when the aircraft is turning during taxiing?
What happens to the tail wheel when the aircraft is turning during taxiing?
What is the purpose of the lines painted on the underside of the nose of the aircraft?
What is the purpose of the lines painted on the underside of the nose of the aircraft?
What is the purpose of the auto brake control valve in the auto-braking process?
What is the purpose of the auto brake control valve in the auto-braking process?
What type of spring is used to centre the nose wheel on the MB-326H Macchi aircraft?
What type of spring is used to centre the nose wheel on the MB-326H Macchi aircraft?
What happens to the wheels spinning after the landing gear is selected up?
What happens to the wheels spinning after the landing gear is selected up?
What happens to the aircraft when the left brake is applied during taxiing?
What happens to the aircraft when the left brake is applied during taxiing?
Which system provides pressure to operate the shuttle valves during auto-braking?
Which system provides pressure to operate the shuttle valves during auto-braking?
What is the purpose of the parking brake valve in the auto-braking process?
What is the purpose of the parking brake valve in the auto-braking process?
What is the primary purpose of the nose wheel on tricycle configurations?
What is the primary purpose of the nose wheel on tricycle configurations?
What initiates the auto-braking process after take-off?
What initiates the auto-braking process after take-off?
What is used to centre the nose wheel on tricycle configurations after a turn?
What is used to centre the nose wheel on tricycle configurations after a turn?
What type of braking system is used during taxiing in the figure shown?
What type of braking system is used during taxiing in the figure shown?
What is the function of the shuttle valves in the auto-braking process?
What is the function of the shuttle valves in the auto-braking process?
What happens to the tail wheel when the aircraft returns to straight line taxiing?
What happens to the tail wheel when the aircraft returns to straight line taxiing?
What is the primary function of the brake units in the auto-braking process?
What is the primary function of the brake units in the auto-braking process?
Which system is not directly involved in the auto-braking process?
Which system is not directly involved in the auto-braking process?
What is the result of the pressure from the No. 2 system operating the shuttle valves?
What is the result of the pressure from the No. 2 system operating the shuttle valves?
What is the purpose of the pressure from the landing gear up line in the auto-braking process?
What is the purpose of the pressure from the landing gear up line in the auto-braking process?
Study Notes
Aircraft Steering and Braking
- Aircraft use differential braking while tail steering is disengaged, and the tail wheel re-engages when the aircraft returns to straight-line taxiing.
- Applying the left or right brake forces the castoring type nose wheel to deflect left or right on tricycle configurations.
- Nose wheel aircraft use spring or cam centring devices to centre the lower fork after the aircraft has been turned.
Brake Types
- Single disc brakes are the most popular type of brake for modern light aircraft, with a calliper that applies a squeezing action between fixed linings and a rotating disc.
- There are two types of single disc brakes: one with the disc keyed into the wheel and free to move in and out, and another with the disc rigidly attached to the wheel and the calliper moving in and out on anchor bolts.
Brake Components
- The disc rotates between two linings and is clamped when hydraulic fluid under pressure forces the brake piston onto the movable lining and against the disc.
- The housing is bolted to the axle and holds the two linings, one fixed in a recess in the outer portion of the housing, and the other riding in the inner side.
Auto-Braking System
- The auto-braking system applies pressure to the parking brake valve, which opens to allow pressure from the No. 2 system to operate the shuttle valves and direct pressure to the brake units to stop the wheels spinning.
Bleeding the Brake System
- It is essential to follow the maintenance manual in detail when bleeding power brakes, as there may be anti-skid components, de-boosters, or hydraulic fuses in the lines that must be given special consideration.
- The bleeding procedure is not complete until both the main and emergency systems are free of air.
Hydraulic Fluid
- The hydraulic system of a modern aircraft may use phosphate-ester-base synthetic fluid such as Skydrol, mineral-base MIL-H-5606, or synthetic MIL-H-83282A fluid.
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Description
This quiz assesses your understanding of aircraft taxiing and braking procedures, including differential braking and tail wheel re-engagement.
