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Answer by Dave for What is that hole on the front portion of the empennage of...
It is the Ram Air Inlet Duct for the cabin air system. It normally acts as cooling air for the packs but can also be used as an alternate vent source in an emergency. The cooling efficiency of each air...
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What is that hole on the front portion of the empennage of a CRJ-1000?
I've noticed that there is a hole on the front tip of the "dorsal fin" of the CRJ-1000. I've been thinking that it would be logical if that's the intake for its APU unit. But I'm not really sure.Image...
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