What Are Two Aviation Major Types Of Shock Struts?

What is shock strut in aircraft?

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. The top cylinder is attached to the aircraft, and the bottom cylinder is attached to the landing gear.

What are the 2 types of landing gear?

Landing gear usually comes in three basic wheel arrangements: conventional, tandem and tricycle- type. Beyond this, landing gear is then classified as either fixed or retractable. Fixed landing gear hangs underneath an aircraft during flight, whereas retractable landing gear is stowed inside an aircraft during flight.

What is shock strut its operation and maintenance?

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.

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What are the three basic shock absorbers of aircraft landing gear?

Landing Gear Components & Equipment:

  • Struts transmit shock loads of landing, takeoff, and taxi to the airplane structure.
  • There are three types of landing gear struts: Bungee.
  • Bungee Struts:
  • Spring Struts:
  • Oleo Struts:

What is a shock and what is a strut?

The primary difference between a strut and shock is in the design of the individual suspension system. Struts are used on vehicles without an upper control arm and connect to the knuckle while vehicles with an upper and lower control arm (independent suspension) or a solid axle (on the rear) use shock absorbers.

Why is it called oleo strut?

It had been derived from the recuperative gear design of the Vickers gun, controlling recoil by forcing oil through precisely sized orifices. Vickers’ oleo strut was first applied to an aeroplane by the French aircraft company Breguet Aviation.

How many landing gears does a 747 have?

The Boeing 747 has four main landing gears in its center section, as well as its single nose landing gear.

Why are landing gears tilted?

Every aircraft landing gear that has a bogie beam supporting two or more axles, right from the Boeing 707 of the 1960s which has a tilt mechanism on each main landing gear. The purpose of the tilt mechanism is to allow proper truck alignment for retraction into the wheelwell.

What happens when landing gear doesnt work?

When an aircraft is unable to touch down with its landing gear fully extended it must perform a gear -up or “belly” landing. Such a landing does carry a small risk – there is likely to be damage to the aircraft; it could conceivably catch fire or flip over if it lands too hard.

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How much oil should be put into an oleo shock strut?

LANDING GEAR SYSTEMS

Question Answer
What takes up the taxi shocks in an oleo shock strut? Compressed air.
How much oil should be put into an oleo shock strut? Deflate the strut completely, remove the filler plug and fill the strut with oil to the level of the filler plug.

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Why is nitrogen used in struts?

We use nitrogen because it helps reduce aeration and cavitation during damper operation. Because it also has a greater density than just air, that means a damper can hold its pressurized charge for a longer period of time. One other characteristic is that nitrogen is inert. It’s safe to use for shock absorbers.

How much is a landing gear?

Landing Gears Are Expensive! A set of Landing Gears for an Airbus 320 cost around 1.8 million USD increasing to 5.0 million USD for Airbus 330/340 and upwards of 7.0 million USD for B777.

What is a strut and what does it do?

Struts serve multiple purpose: the internal shock absorber will dampen the movement of the spring as it compresses and rebounds itself while the vehicle is travelling and with its spring it will support the weight of the vehicle while it is moving so that it can adapt to road irregularities In sum, while the shocks

Which is better to use the landing skid or the landing gear?

Looking at the weight, skid landing gear is lighter than wheels. This makes skids optimal for small helicopters, or when you try to optimize for weight. Skids are fixed in place, and require very little maintenance.

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