What is the purpose of a torque link on an oleo strut? To keep the wheel in alignment and prevent the piston from coming out of the cylinder.
What is the function of the torque links?
The torque links allow the piston to move freely in and out of the landing gear cylinder, but prevent it rotating. The torque links can be adjusted to achieve and maintain the correct wheel alignment. Torque links are also called scissors and nutcrackers.
What is the primary function of torque links on a shock strut?
As previously mentioned, a torque arm or torque links assembly keeps the lower strut cylinder from rotating out of alignment with the longitudinal axis of the aircraft. In some strut assemblies, it is the sole means of retaining the piston in the upper strut cylinder.
What is torque link in landing gear?
In the landing gear assembly of an aircraft, the torque links connect the two telescoping cylinders and prevent the relative rotation of the piston to maintain the wheel alignment during taxiing on ground. … The torque link is designed in CREO3.What is the purpose of main landing gear torque links and arms?
Torque Links Torque arms keeps the wheel aligned which is necessary to affect a safe landing. The torque links are scissor shaped to allow the piston to extend and retract inside the main oleo cylinder. Figure 9: A Torque Link (LH) and Shimmy Damper (RH) fitted to the nose wheel of a light aircraft.
What should be checked when a shock strut bottoms during a landing?
What should be checked when a shock strut bottoms during a landing? the direction of fluid pressure. allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber.
What is the function of a torque link on a landing gear strut quizlet?
What is the purpose of a torque link on an oleo strut? To keep the wheel in alignment and prevent the piston from coming out of the cylinder.
What is the drag brace of landing gear?
The primary function of the Drag Brace is to ensure that the gear remains extended during landing and ground operations. The Drag Brace for this gear is complicated, multi part design, with one end attached to the aircraft structure while the lower end is attached to the shock strut.Why is it important to keep the gear wheels properly aligned?
Besides tyre wear and wear patterns, the more important reason why wheel alignment is important for safe driving is the need to reduce stresses and strains on vehicle suspension components and improve the handling of the vehicle. … Uneven tyre wear – Tyre wear and tyre health are greatly affected by misalignment.
What is driven to extend or retract the landing gear by fluid from the power pack?A hydraulic actuator for each gear is driven to extend or retract the gear by fluid from the power pack.
Article first time published onWhat is the importance of maintaining proper pressure in the shock strut?
Efficient operation of the shock struts requires that proper fluid and air pressure be maintained. To check the fluid level, most struts need to be deflated and compressed into the fully compressed position. Deflating a shock strut can be a dangerous operation.
How does a shock strut work?
First, struts perform a shock damping function like shock absorbers. Internally, a strut is similar to a shock absorber. A piston is attached to the end of the piston rod and works against hydraulic fluid to control spring and suspension movement. … Struts also perform a second job.
How much hydraulic fluid should be put into an oleo strut?
Typically it takes around a gallon of hydraulic fluid to service three struts. Nitrogen is better than compressed air for strut servicing because it is drier and doesn’t vary in pressure as much as air; it is also less corrosive to the inside of the strut housing.
What are used to inform the pilot of gear position status?
Gear indicators are another safety device. They are used to communicate to the pilot the position status of each individual landing gear at any time.
What helps control oscillations of the nose gear?
A shimmy damper helps control oscillations of the nose gear. Nose gear struts are often equipped with a locking or disconnect pin to enable quick turning of the aircraft while towing or positioning the aircraft when on the ramp or in a hangar.
What is toe in aviation?
When a pair of wheels is set so that their leading edges are pointed slightly towards each other, the wheel pair is said to have toe-in. If the leading edges point away from each other, the pair is said to have toe-out.
What is a torque link damper?
There is a torque-link damper at the interface of the upper and lower torque-links. The torque-link damper absorbs the vibrations that can occur during landing. … The valves are used to fill the shock absorber with hydraulic fluid and nitrogen.
What absorbs the initial landing impact in an oleo strut?
An oleo strut is a pneumatic air–oil hydraulic shock absorber used on the landing gear of most large aircraft and many smaller ones. … A steel coil spring stores impact energy from landing and then releases it, while an oleo strut instead absorbs this energy, reducing bounce.
What is the purpose of the O-ring between the wheel halves of a split wheel assy?
What is the purpose of the rubber O-ring mounted on the mating surface of the outer wheel half of a split type wheel? To prevent air leakage from the tubeless tire used with this wheel.
Why would it be necessary to deflate the landing gear shock struts before the removal of an engine?
In addition, the landing gear shock struts can be deflated to prevent them from extending as the engine weight is removed from the aircraft. After taking these necessary precautions, begin removing the cowling from around the engine.
What type of care should be given on a landing gear shock struts?
Efficient operation of the shock struts requires that proper fluid and air pressure be maintained. To check the fluid level, most struts need to be deflated and compressed into the fully compressed position.
What hydraulic unit prevents nose wheel vibration?
The shimmy damper is a cylinder (traditionally filled with hydraulic fluid) that prevents rapid movement of an aircraft’s nose or main landing gear during take-offs and landings.
How can the torque links be used to establish toe in or out on landing gear?
A torque arm or torque links assembly keeps the lower strut cylinder from rotating out of alignment with the longitudinal axis of the aircraft. … Aircraft equipped with air/oil struts typically use shims between the two arms of the torque links as a means of aligning tow-in and tow-out.
What happens when your alignment is off?
Tires that are out of alignment tend to drag to the side, forcing the driver to keep a hard grip on his or her steering wheel. Misalignment can adversely affect how a vehicle brakes and handles, compromising safety on the road. Tire drag from misaligned wheels could also result in the vehicle consuming more fuel.
What are the three possibilities of wheel alignment?
These adjustments are the camber, caster and toe. On some cars, not all of these can be adjusted on every wheel. These three parameters can be further categorized into front and rear (with no caster on the rear, typically not being steered wheels).
Why is landing gear retracted after take off?
Normally, the landing gear is retracted after lift-off when the airplane has reached an altitude where, in the event of an engine failure or other emergency requiring an aborted takeoff, the airplane could no longer be landed on the runway. … The climb characteristics of the particular airplane.
How is landing gear so strong?
This is a telescoping tube-within-a-tube. Gudmundsson explained that the shock energy is absorbed in the landing by forcing oil in a chamber (in the strut) through small orifices, against a chamber of dry air or nitrogen. The oil and gas are maintained under very high pressure.
Why do planes retract landing gear?
When you retract it the speed will increase at a larger rate. This means that the landing gear creates a drag which reduces the aircraft speed. If the drag increases then the fuel consumption will increase. Moreover the gear might get damaged at high speed.
How do hydraulics work on a plane?
In an aircraft, hydraulics control the movement of an aircraft, left and right, upwards and downwards. Hydraulic system works on the basic principle that force applied at one point is transmitted to another point using an incompressible fluid. … The force is almost always multiplied in the process.
How does hydraulics system work?
Hydraulic systems work by using pressurized fluid to power an engine. These hydraulic presses put pressure on a small amount of fluid in order to generate a large amount of power. … This means that whatever the piston is lifting is secure until the system operator allows it to be released.
What are hydraulics uses?
Hydraulics are often used for moving parts of mechanical systems that need to lift or push heavy objects. The landing gear in an aircraft use several hydraulic cylinders to move the wheels into place and to cushion the aircraft’s landing.
