Aircraft Wheels Flashcards
supports the aircraft when it is on the ground and to provide it with a means of mobility for takeoff, landing, and taxiing
wheels and tires
help to cushion the aircraft from shocks due to irregularities in the ground surface and take some of the shock on landing
pneumatic tires
irregularities in the ground surface
bumps
houses brake units
main wheels, sometimes nose wheels
control the movement of the aircraft on the ground and provide a means of deceleration on landing
brake units
Because aircraft tires are usually larger and stiffer than the tires found on cars, they also have to be specially designed to facilitate ________.
tire replacement
Two Types of Wheel in Common Use
loose or detachable flange type, divided wheel
Both the loose and the detachable flange type of wheel are made with one ____________ and the other a separate removable part which is machined to fit over the wheel rim.
flange integral with wheel body
The difference between the loose and the detachable flange tires is the method by which the removable flange is ______.
secured
In the loose flange type, the flange is retained by a ________ on the wheel rim and held in place by the __________.
locking device, tire pressure
In the detachable flange type of wheel, the flange is secured to the wheel body by __________.
nuts and bolts
In the __________, the flange is retained by a locking device on the wheel rim and held in place by the tire pressure.
loose flange type
In the ____________ of wheel, the flange is secured to the wheel body by nuts and bolts.
detachable flange type
A ________ flange maybe a single piece or two or three pieces bolted together.
detachable
The advantage of the loose or the detachable flange type of wheel is that the tire can be changed without _______________.
removing the wheel from the aircraft
What type of wheel is most usually found on aircraft?
divided wheel
It consists of two half wheels matched up and joined together by bolts which passed through the two halves.
divided wheel
A divided wheel consists of two half wheels matched up and joined together by _____ which pass through the two halves.
bolts
Why is seal incorporated at the joint of a divided wheel?
- prevent abrasion between two halves
- airtight fit
What do you call the tendency for the tire to rotate around the wheel when in service particularly during heavy braking?
creep
If creep is excessive, it will tear out the _______ on a wheel fitted with an inner tube causing the tire to burst.
inflation valve
When is creep less likely to occur?
if gas pressure is correctly maintained
What happens if the inflation valve is torn out?
the tire will burst
Methods to Prevent Creep
- knurled flange
- rim tapered wheel
The inner face of the wheel flange is milled so that the side pressure of the tire locks the tire walls to the flange. What creep prevention method is used here?
knurled flange
The flange area has a greater diameter than at the center of the rim. When the tire is inflated, the side pressure forces the tire outwards to grip the rim. What creep prevention method is used here?
rim tapered wheel
Under extra hard braking conditions, the heat generated in the wheel tire and brake assembly can be sufficient to cause the pressure to rise to a level that the tire cannot withstand causing it to split with possible catastrophic consequences for the aircraft. What is this called?
tire blowout
These are fitted in some wheels to prevent a sudden tire blowout by screwing them into holes in the wheel rim and are sealed by a piston which is held by a fusible alloy. What is this called?
fusible plugs or thermal plugs
Fusible plugs or thermal plugs are screwed into holes in the ______ and are sealed by a piston which is held in position in the plug by a _________.
wheel rim, fusible alloy
Under excessive heat conditions, the alloy melts allowing the piston to escape this causing the tire to _____ in a controlled manner.
deflate
