The material of the aircraft landing gear, where is the aircraft landing gear made

Not necessarily titanium alloys, general aircraft use high-strength alloy steel, composite materials and titanium alloys and other materials.

The landing gear of carrier-based aircraft has high requirements, and at present, titanium alloy and other materials are mainly used, and the cost is high.

Generally, ordinary aircraft mainly use high-strength steel.

Goodrich is a world-renowned aircraft parts manufacturer, providing components for Boeing, Airbus and other major aircraft manufacturers for a long time, with more than 90 factories in 16 countries around the world. Goodrich is also the leader of the Airbus A380 landing gear, which is very good.

The landing gear of the C919 was localized and delivered by Liebherr AVIC Aviation (Changsha) Co., Ltd. to Commercial Aircraft Corporation of China.

Different models are produced in different places.

Aircraft landing gear cannot be made of aluminum alloy material.

In order to ensure that the landing gear can withstand huge loads and at the same time meet the requirements of long-term use, the material should have high strength, rigidity and good toughness. At present, the landing gear materials widely used in foreign countries are low-alloy ultra-high-strength steels. Among them, the 300m steel in the United States is the steel with the highest strength and the best comprehensive performance for aircraft landing gear in the world today.

In addition to the United States, there are also French 35NCD16 steel used in the production of military and civil aircraft landing gear such as "Mirage" and "Concorde", and 30X CH2A steel was successfully developed in the early fifties of the former Soviet Union, which was subsequently used in the production of various military and civil aircraft landing gear in the former Soviet Union.

In the 80s of the 20th century, China successfully developed 40 chromium steel. In 2009, China's Baosteel Special Steel Group began the research and development of 300m ultra-high strength steel, and in 2018, it successfully passed the certification of Commercial Aircraft Corporation of China and Liebherr Group of Germany.

Generally, there are several types of wheeled landing gear, skid type, pontoon type, etc.

The wheel type is the most common, and there are rear three-point type, front three-point type, and bicycle type according to the different landing gear arrangements.

Around World War II, the post-three-point form was commonly used.

Skid-type is generally used.

The pontoon type is generally used for seaplanes.

There are also special landing gears, such as slide catapults for some drones.

There are also different aircraft take-off and landing, for example, some drones have slide catapults to take off and land with parachutes.

This is really impossible to answer, different aircraft should have different designs, some complex, some simple. Usually, the mass of the landing gear accounts for 4%-6% of the total normal take-off weight of the aircraft and 10%-15% of the structural mass. The installation of landing gear on an aircraft serves two purposes:

The first is to absorb and dissipate the impact energy and horizontal capacity of the aircraft and the ground; The second is to ensure that the aircraft can complete various actions on the ground freely and stably. In order to adapt to the gravity of the aircraft in the process of takeoff, landing taxiing and ground taxiing, and at the same time absorb the vibration and shock load of the aircraft during taxiing and landing, and bear the corresponding load, the lowest end of the landing gear is equipped with wheels with pneumatic tires. In order to shorten the landing run distance, the wheels are equipped with brakes or automatic braking devices.

In addition, it also includes load-bearing struts, shock absorbers (commonly used as the outer cylinder of shock absorbers), retracting mechanisms, front wheel swing reducers and turning control mechanisms. The load-bearing struts attach the wheels and shock absorbers to the airframe and transfer the impact loads during landing and taxiing to the airframe. The front wheel sway absorber is used to eliminate the oscillation of the front wheel in high-speed coasting.

The nose wheel turning control mechanism can increase the flexibility of the aircraft in ground turning. For aircraft that take off and land on snow and ice, the wheels on the landing gear are replaced by skies.

Composition of the landing gear of the aircraft:

The landing gear of an aircraft consists of numerous structures and complex systems of integrated devices. The structure of the landing gear comprises a shock absorption system, a support strut, a strut rod, a wheel, a brake device, an anti-skid control system, a retraction mechanism, an electrical system, a hydraulic system, a retraction motion lock and a position indication device, a steering mechanism, a landing gear door and its retraction mechanism, etc.