Cabin pressure

From:         wdockery@pipeline.com (Wayne Dockery)
Organization: The Pipeline
Date:         22 May 95 12:50:58 
Followups:    1 2 3 4 5 6 7 8
Next article
View raw article
  or MIME structure

If the cabin in a commercial passenger aircraft is
pressurized, how is it possible to exhange fresh
air from the outside since I would assume the aircraft
is somewhat airtight?  Also, is the pressure managed
by a air-compressor or is it simply "scooped" from the
outside via some sort of duct-work into the cabin thereby
generating the pressure?

wdockery@pipeline.com