Airliners control cabin pressure by feeding in bleed air from the engines and then releasing it via valves on the aft bulkhead. Turns out that the valves were maintenance headaches, they were constantly clogged with cigarette tar, with the result that regulating cabin pressure would become difficult.
Airliners control cabin pressure by feeding in bleed air from the engines and then releasing it via valves on the aft bulkhead. Turns out that the valves were maintenance headaches, they were constantly clogged with cigarette tar, with the result that regulating cabin pressure would become difficult.
Plus, air in the stratosphere is very clean.
Airliners control cabin pressure by feeding in bleed air from the engines and then releasing it via valves on the aft bulkhead. Turns out that the valves were maintenance headaches, they were constantly clogged with cigarette tar, with the result that regulating cabin pressure would become difficult.