What is the function of a torque link on a landing gear 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 the function of a torque link on a strut?
What is the function of a torque link on a landing gear 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 the purpose of torque links on a landing gear?
What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut? maintain correct wheel alignment When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by the fluid being forced through a metered opening
What is a rigid strut landing gear?
Rigid struts were the original type of landing gear. The idea was simple: weld the wheels to the airframe. The problem was the imperfect landing; a hard touchdown meant the strong shock load transfer went directly into the airframe.
What are hydraulic packing seals used in a landing gear shock strut?
The hydraulic packing seals used in a landing gear shock strut are A. generally designed to be compatible with more than one type of fluid B. kept from direct contact with fluid by teflon or nylon backup rings C. used only with a specific type of fluid used only with a specific type of fluid
What is the purpose of the torque link in a 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.
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 purpose of a torque link on an oleo strut?
Most oleo struts are equipped with a torque link, or scissor link, that connects the upper cylinder and lower piston to prevent rotation of the piston within the cylinder and to maintain alignment of the wheel. The torque link contains a joint in the middle to allow piston retraction and extension.
What is a torque link damper?
Torque Links The upper torque-link and the lower torque-link align the axle. They attach to the lugs at the front of the main fitting and the sliding tube. 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.
How does a shimmy damper work?
A shimmy damper uses a cylinder filled with hydraulic fluid or a rubber/lubricant combination to prevent rapid movement of the nosewheel, while not interfering with slower operations.
What would excess axle nut torque applied during wheel installation will cause?
Axle Nut Torque If the nut is too loose, the bearing and wheel assembly may have excessive movement. The bearing cup(s) could loosen and spin, which could damage the wheel. There could also be impact damage from the bearing rollers which leads to bearing failure.
How does an oleo strut dampen the shock of landing?
The “oleo” strut uses compressed air or nitrogen combined with hydraulic fluid to absorb and dissipate the shock of landing, and to damp the recoil to minimize bounced landings.
What is drag strut landing gear?
A hinged drag strut holds the trunnion and gear firm for landing and ground operation. It folds at the hinge to allow the gear to retract.
What is torque link in aviation?
Torque Links. The hinged link between the piston and cylinder of an oleo-type landing gear shock absorber. 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.
What is the only shock absorber?
The last type of strut is the only one that is a true shock absorber. Shock struts, often called oleo or air/oil struts, use a combination of nitrogen (or sometimes compressed air) and hydraulic fluid to absorb and dissipate shock loads on landing. You can find them on some smaller aircraft, like the Piper Cherokee, but you most often find them on larger aircraft, like business jets and airliners.
What happens when hydraulic fluid moves through a hole?
As the fluid moves through the hole (very quickly, by the way), it creates heat. And essentially, the kinetic energy of fast moving hydraulic fluid is transferred into thermal energy, and the shock of your touchdown is absorbed. Cesar Meloni. You can really see oleo struts in action when you watch airliners land.
What is the bottom cylinder of a shock strut?
The top cylinder is attached to the aircraft, and the bottom cylinder is attached to the landing gear. The bottom cylinder, typically called the piston, can also freely slide in and out of the upper cylinder. p_v a l d i v i e s o.
What is rigid struts?
Rigid struts were the original type of landing gear. The idea was simple: weld the wheels to the airframe. The problem was the imperfect landing; a hard touchdown meant the strong shock load transfer went directly into the airframe. And the pilot and passengers definitely felt it.
What is landing strut?
One of the most common landing strut systems on general aviation aircraft is the spring steel strut. If you've ever flown (or ridden in) a Cessna, you know what it is. These aircraft use strong, flexible materials like steel, aluminum or composites to help absorb the impact of a landing.
What is the hole in the bottom of a cylinder?
If you look at a cutaway of the two cylinders, what you almost always find is the bottom cylinder filled with hydraulic fluid, the top cylinder filled with nitrogen, and a small hole, called an orifice , connecting the two.
Why is spring steel used in airplanes?
Spring steel is popular because it's mechanically simple, typically lightweight, and needs little to no maintenance.
Why are my brakes hard?
If an airplane equipped with master cylinders and single disc brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is: worn brake linings. Internal leakage in a brake master cylinder unit can cause: the pedal to slowly creep down while pedal pressure is applied. How can it be determined that all air has ...
How often should you check your landing gear tires?
Aircraft tire pressure should be checked: at least once a week or more often .
What is the purpose of a relief valve in a brake system?
reduce the pressure to the brake and increase the volume of fluid flow. The purpose of a relief valve in a brake system is to: compensate for thermal expansion. Debooster valves are used in brake systems primarily to: reduce the pressure and release the brakes rapidly. The pressure source for power brakes is:
What is a slippage mark on a tire?
A stripe or mark applied to a wheel rim and extending onto the sidewall of a tube type tire is a. slippage mark. Over inflated aircraft tires may cause damage to the: wheel flange. The primary purpose for balancing aircraft wheel assemblies is to: prevent heavy spots and reduce vibration.
What does it mean when an aircraft tire is worn in the shoulder?
Excessive wear in the shoulder are of an aircraft tire is an indication of: under-inflation. An embossed letter "H" on an air valve core stem: indicates high-pressure type. Excessive wear in the center of a tread of an aircraft tire is an indication of: over-inflation .
What is a nose cam?
The primary purpose of the centering device is to. center the nose wheel before it enters the wheel well. a landing gear position and warning system will provide a warning in the cockpit when the throttle is.