Wheels, Tyers And Brakes Flashcards
Tubeless tyres are lighter. What does this do to heat generation?
Decreases it.
What are tyres inflated with?
Nitrogen.
A tyres’ layers go from crown to shoulder to sidewall to what?
Bead.
Where does a tyre ware when under-inflated?
At the shoulders.
What is tyre creep?
When acceleration causes tyre to slip around the wheel.
How do you measure tyre creep?
Creep marks must overlap.
The term “ply rating” stands for what?
Strength of tyre.
Landing gear torsion links are used to…
prevent rotation of the landing gear piston in the oleo strut.
In a piston engine, turbocharger boost pressure can be monitored by…
Manifold pressure gauge.
What type of tyre tread does an a320 have?
Ribbed
Why might you use a chined tyre compared to a marstrand tyre?
They keep water from the engines
Where is the maximum load and speed printed on a wheel?
Tyre sidewall.
Whats the minimum tread depth on a ribbed tread?
2mm
What percentage of inflation does a tyre need to loose in order to have tyres re inflated?
10%
What is it called when a wedge of water builds up in front of the tyre?
Aquaplaning.
What factor do we use to calculate the aquaplaning speed?
Tyre pressure.
When pressure is in psi, what is the equation for aquaplaning speed?
A = 9 -/P
When pressure is in kg/cm^2, what is the equation for aquaplaning speed?
A = 34-/P
Above the aquaplaning speed, what occurs?
The tyre looses contact with the ground.
What do you measure aquaplaning speed in?
Nautical miles per hour.
What is an example of tyre overheat protection.
Fusible plug.
Does the break wear indicator pin stick put or in when the breaks are worn?
In
What causes brake fade?
Overheating
What do you use to check break wear?
Break wear indicator pin.
Whats an advantage of carbon breaks?
Lighter / last long /
Are steel brakes or carbon breaks less prone to brake fade?
Carbon.
What aircraft uses electric brakes?
787
Why do aircraft need time between the next takeoff?
Brake heat.
Anti skid has to be serviceable to use blank.
Autobrake.
What happens to the break pressure when an anti skid is detected?
Pressure reduced to the slowest turning wheel.
Pressure is reapplied at lower pressure and rises to find maximum blank blank on an anti skid.
Braking force.
When does antiskid turn off?
Walking pace.
Anti-skid systems contain touchdown bounce protection. What does this mean?
Prevents brake pressure being applied before touchdown.
What does autobraking control?
Deceleration rate.
What speed does auto brakes arm on a rejected takeoff?
80knots.
What two things can you do to turn off autobrake?
Apply manual brakes or set thrust to toga.
What must be on and working in order to have auto brake?
Anti-skid.
Parking brakes should not be set if what?
Brakes are excessively hot.
Strain is a measure of blank of the fuselage.
Deformation.
True or false: Cockpit windows never have an additional speed restriction, related to bird impact, when window heating is inoperative
False
After using the emergency braking system, the brake pedals will feel blank?
Soft underfoot.
True or false : Careful brake application by the pilot in case of anti-skid failure can never achieve the same performance as a properly functioning anti-skid system
True
True or false : With RTO not available, take-off might not be allowed because the minimum braking distance with manual braking is longer.
True.
What is the input data of the Anti-skid system?
- Wheel speed
- Groundspeed
- Wheel speed of all the wheels on the boogie
- Tire pressure
- Brake temperature
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Break pressure will be Decreased on the faster/slower turning wheels.
Slower
Shimmy occurs on the nose-wheel landing gear during taxiing when the wheels:
- tend to describe a sinusoidal motion on the ground
- no longer respond to the pilot’s actions
This effect is countered by:
- the torque link
- an accumulator associated with the steering cylinder
1 4
Nose wheel shimmy : An oscillatory lateral movement of the nose-wheel about the longitudinal/lateral axis of the aircraft when the nose wheel is in contact with the runway during the take-off or landing run.
Longitudinal
