What are the primary sources of pneumatic power in aircraft?

The primary sources of pneumatic power in aircraft are storage bottles and engine bleed air. Engine bleed air is sourced from the engines and is used for a variety of functions, including air conditioning, pressurization, and starting auxiliary power units or engines. It is essential for operating systems that require pneumatic pressure.

Storage bottles, often filled with compressed air, serve as reservoirs for pneumatic systems. These bottles can provide quick bursts of high-pressure air needed for specific operations, such as opening emergency exits or operating certain pneumatic tools.

By utilizing both engine bleed air and storage bottles, aircraft efficiently leverage pneumatic power for various critical functions, making this combination the most significant source of pneumatic energy in aviation.