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How do bleedless passenger airliners keep cabin air breathable?
Bleedless aircraft still get air from outside. They just have dedicated compressors to compress outside air for cabin use, rather than relying on bleed air from the engines.
The air compressors have ...
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How do bleedless passenger airliners keep cabin air breathable?
tl;dr: Through air intake holes using compression.
For example, here they are on the fuselage of a Boeing 787, below the forward edge of the wing:
Bottom intake air gets compressed (and thus heated)
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