11.13 Wheels & Braking Systems Flashcards
What problems are wheels subjected to ?
-repeated shock-loading
-high temps from the brake units
-cold temperatures of altitude
-exposure to moisture and FOD
What must the construction of a wheel be?
-lightweight
-strong
-able to resist extreme temperatures
-protective against the elements
What are aircraft wheels generally produced from ?
Forged or cast aluminium alloy and some are made from magnesium alloy. These materials are light and known for their high strength
How are wheels constructed ?
Two half hubs, connected with fasteners that carries a tubeless tyre. Where the two halves of the hubs connect, there is a groove, which is fitted with an O-ring to create a seal for a tubeless tyre
What part of the wheel takes the tensile loads during takeoff and landing ?
The bead of the tyre
How do early aircraft wheels and modern aircraft wheels differentiate?
Early wheels were a singular piece construction
What bearings are used in wheels ?
Tapered roller bearings
How does the wheel come from manufacture?
Statically and dynamically balanced
Which wheels are typically fitted with brakes?
The main landing gear wheels
Where are brakes fitted ?
The inboard half of the wheel
What is installed to the wheel to prevent heat damage from the brakes ?
A heat shield, however, it cannot isolate the wheels and tyres from very high temperatures.
How hot can brakes get ?
Can sometimes reach over 1000°C
What must be done after an overheat event ?
Inspect area specified in the AMM
What can happen if heat energy from the brakes Is not dispersed rapidly ?
Tyres can overheat and burst and brake fires can occur.
If an overheat condition is raised for the brakes, what must the maintenance team do ?
Must keep a safe distance from the wheels and never approach from the side
