The parts of an oleo strut and its working

1. Functionality of a
Landing Gear Suspension
Bazil M H
S5 AERO

2. What is a landing gear suspension?
• It is the part of landing
gear which absorbs the
impact energy during
landing and provides a
smooth touchdown.
suspension

3. Parts of oleo strut
• An oleo strut consists of the following
components.
Outer cylinder
Inner cylinder
Tapered metering pin
Wheel axle
Servicing valve
Torque links

4. Parts of oleo strut
• Tapered metering pin :- used for controlling
the rate of flow of hydraulic fluid through the
orifice.
• Wheel axle :- Provision for connecting aircraft
wheels.
• Servicing valve :- Provides a means for filling
hydraulic fluid or air.
• Torque links :- It is provided for keeping the
piston and wheels aligned.

5. Functioning
• A shock strut or oleo strut is constructed of
two telescoping cylinders which that are closed
on external ends.
• The upper cylinder is fixed to the aircraft and
the lower cylinder is free to slide in and out of
the upper cylinder.
• Two chambers are formed.

6. Functioning
• The lower chamber is always filled with hydraulic
fluid and the upper chamber is filled with
compressed air or nitrogen.
• An orifice is located between the two cylinders.
• During landing, the inner cylinder is moved
upward and the hydraulic fluid in the lower
chamber moves to upper chamber through the
metered orifice, which causes heat.
• This heat is the converted impact energy.

7. THANK YOU