airplanenut
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Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 12:49 am

Hi,

I was wondering if anyone knew whether cargo aircraft are pressurized or temperature controlled outside the cockpit. It seems like it would be costly to pressurized the cargo, but at the same time, if an animal is being shipped, it might appreciate the oxygen.

Thanks,

Jeremy
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FI642
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 12:51 am

Pressurized and temperature controlled. Most Freighters are converted passenger aircraft.
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airplanenut
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 1:01 am

What about aircraft that have always been dedicated freighters, such as the 744F or 752PF? Same systems?
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PanHAM
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 1:09 am

Of course. The differnence between and pax and a cargo airliner are the freight door and the strenghtened floor.

Not only might the animals shipped "appreciate" the oxygen, the crew who might need to go and inspect the cargo section does as well. Not speaking of horse grooms who usually travel with their valuable freight. Besides, there is delicate freight which requires to be shipped in a pressurized environment.

The 747 freighters have seats in the bubble and Cargolux did even sell these at times to freight forwarders and good customers.
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airplanenut
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 1:17 am

Thanks for the info  Smile
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AA737-823
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 1:31 am

Yes, they're fully pressurized and heated, as people have said above.
What people have NOT pointed out yet is that you can't pressurize the cockpit without also pressurizing the rest of the aircraft- it would blow apart. Now, you can set the back of the plane (or lower decks as on my 747 freighters) for a far cooler temperature if you like, but you typically run all packs in flight. Unless one goes INOP on you, then you MEL it to home base and call it a day!
 
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Acey559
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 1:44 am

I was watching an aviation DVD of Atlas Air and they were talking about how they sometimes have flowers and need to have the temperature very low, almost like a refrigerator. I'm sure there are other reasons requiring hot or cold temps, like vaccinations, etc.
 
sdf880
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 2:05 am

Some of our classic 747's have one of the three air conditioning packs deactivated. No problem as the plane can still operate OK on 2. Cost saving measure I guess.

SDF880

[Edited 2007-06-20 19:08:18]
 
Tod
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 2:15 am

Quoting Airplanenut (Reply 2):
What about aircraft that have always been dedicated freighters, such as the 744F or 752PF? Same systems?

The air distribution and temp control systems on 747F models is a simplified version of the pax models.

Additional forward lower deck bleed air heating is added to compensate for the reduced heat coming from the e/e bay cooling system.

The lav is vented directly overboard instead of being ducted to the outflow valves near the back of the plane.

The supplemental air system that pumps recycled air into the main mix manifolds is deleted.

Tod
 
PanHAM
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RE: Pressurizing/Temperature Controlling Cargo A/C

Thu Jun 21, 2007 2:43 am

Quoting Acey559 (Reply 6):
have the temperature very low, almost like a refrigerator. I'm sure there are other reasons requiring hot or cold temps, like vaccinations, et

That is usually such small quantities, its packed in dry ice. Alternately it goes into temperature controlled containers. Like other cargoes as well.

Having a full load of flowers indeed asks for lower temperature in the cabin.
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