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User currently offlineVishalsainath From , joined Dec 1969, posts, RR:
Posted (15 years 5 months 3 weeks 1 day 17 hours ago) and read 1183 times:

I want to know weather a 747-400 cargo section is pressurised or not.

3 replies: All unread, jump to last
User currently offlineJt8djet From United States of America, joined Jul 2000, 214 posts, RR: 0
Reply 1, posted (15 years 5 months 3 weeks 1 day 17 hours ago) and read 1155 times:

Yes, it is.

User currently offlineVirginFlyer From New Zealand, joined Sep 2000, 4652 posts, RR: 37
Reply 2, posted (15 years 5 months 2 weeks 3 days ago) and read 1096 times:

It has to be. When an aircraft is pessurised, the pressure has to be even, or compensated for by strong matterial. This is why aircraft are basically cylindrical, with pressure bulkheads at either end. If the underfloor hold was not pressurised, the floor would need to be very strong to cope with the load placed on it by internal air pressure.

A practical example of what happens when this situation is suddenly changed is the THY DC-10 crash in Paris in the '70s. The cargo door was incorrectly designed. As the aircraft was climbing, it blew out. The underfloor hold instantly depressurised, but the passanger section had no way to do so, meaning there was a very sudden and rather high pressure differential between the area above the floor and under it. As a result, the rear cabin floor collapsed into the hold and fell out the back of the aircraft, taking many passangers withit. This also severed all the control cables, and the aircraft entered a dive and crashed, killing all on board.

"So powerful is the light of unity that it can illuminate the whole earth." - Bahá'u'lláh
User currently offlineDc10hound From United States of America, joined Dec 2000, 463 posts, RR: 5
Reply 3, posted (15 years 5 months 2 weeks 15 hours ago) and read 1051 times:

I certainly hope it is. Big Problem if not....

"Eagles soar. But weasels never get sucked into jet intakes.."
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