What is used to inflate an oleo strut landing gear shock?

The use of a high-pressure source of dry air or nitrogen to inflate an oleo strut landing gear shock is essential for several reasons. Oleo struts are designed to absorb shocks during landing and taxiing by using hydraulic fluid and gas to provide both cushioning and stability.

Using dry air or nitrogen is important because it minimizes moisture, which can lead to corrosion or freezing within the strut system. Moist air, on the other hand, can introduce water vapor into the system, potentially leading to hydraulic fluid contamination and freezing at low temperatures, which would compromise the effectiveness of the strut.

High-pressure sources are necessary to ensure that the oleo strut can withstand the significant forces involved during landing operations. Nitrogen is often preferred due to its non-reactive properties, stability under varying temperature conditions, and lower risk of creating a flammable atmosphere compared to other gases that might be considered.

Normal atmospheric air is not suitable because it contains moisture and varying levels of oxygen that could adversely affect the inner workings of the oleo strut over time. Helium, while a light gas, does not provide the necessary pressure and could lead to issues with the proper functioning of the shock absorbing system.

Thus, using a high-pressure source of dry air