Which air is filled on Boeing 747 flight wheels and why? #airplane #aeroplane #airliner #travel

The wheels of a Boeing 747 (and most other commercial aircraft) are filled with nitrogen, not regular air. Here’s why:

1. Safety

Nitrogen is non-flammable. In the event of overheating during takeoff, landing, or braking, using nitrogen reduces the risk of tire explosion due to combustion — something that could happen if oxygen-rich air were used.

2. Pressure Stability

Nitrogen is an inert gas and does not expand or contract as much with temperature changes as regular air does. This helps maintain more consistent tire pressure, which is crucial for safe and predictable aircraft operations.

3. Moisture-Free

Compressed nitrogen is typically very dry, unlike air which can contain moisture. Moisture inside tires can lead to corrosion of the wheel components and unpredictable pressure changes at high altitudes or temperatures.

Summary:

Nitrogen is used in Boeing 747 wheels for safety, stability, and longevity of the tires under extreme conditions of flight and landing.

Let me know if you want the PSI levels or more about aircraft landing gear systems!

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