Pressurization

Airplanes with a pressure hull that can withstand internal positive pressure. Their internal pressure is kept at a safe and comfortable altitude as the aircraft climbs.

• Pressurized to somewhere around 8000 feet pressure altitude
• Need some kind of inflow and outflow
  • Compressed air often comes from turbochargers
  • Flow control venturi system
• Terms
  • Ambient altitude
  • Ambient pressure
  • Cabin altitude
  • Differential pressure

Pilot's Handbook of Aeronautical Knowledge pg. 7-35

• Explosive decompression
  • Depressurization that's faster than the lungs can expel air
• Rapid decompression
  • Decreases the period of useful consciousness because oxygen in the lungs is exhaled rapidly