Conditions in de-pressurized zone
Joined: Feb 2008
Posts: 1,342
Likes: 0
From: Wingham NSW Australia
Un-pressurised area of aircraft
Before you get "bashed" for asking the question, those areas which are not pressurised will be exposed to the range of temperatures felt between ground temperature to whatever temperature is encountered at cruising level. The pressure variation will be ambient pressure anywhere between that at ground level and that at cruising level.
Joined: Sep 2010
Posts: 1,339
Likes: 0
From: earth
Having to work in those unpressurized zones on a hot ramp, it can be just as hot if not hotter than your car can get on the same day. At altitude I would assume over time it gets close to OAT, a tad bit warmer due to shelter and warming operating components.
Joined: Feb 2004
Posts: 1,410
Likes: 37
From: Australia
a tad bit warmer due to shelter and warming operating components
Someone once told me that if stowaways in the wheel wells don't get crushed or fall out on takeoff, their next worry is extremes of heat from wheels and brakes. Then, of course, hypoxia and cold.
Joined: Feb 2008
Posts: 1,342
Likes: 0
From: Wingham NSW Australia
ISA
Shahone. I presume you are not a pilot. What Felixthecat is referring to is International Standard Atmosphere (ISA) which you can find, among other places, on Wikipedia. ISA is 1013.25 hPa pressure and 15 degrees C at Sea Level. As altitude is increased the temperature will usually decrease by approximately 2 degrees C per 1000 feet (up to about 36000 feet) and pressure decreases by roughly 1 hPa per 30 feet. Hope this is helpful.
Thread Starter
Joined: Jul 2011
Posts: 4
Likes: 0
From: Germany
Thank you guys for your helpful input. So one could safly assume that the cabin temprature at altitude drops roughly to the same level as the outside temprature (suppose -50°C)? How long does it take for the temprature to fall to this extent. And is this area accessable during flight?
Is the cargo area pressurized?
@Old Fella
your assumption is correct. I thank you for your explination, it is very helpful indeed
Is the cargo area pressurized?
@Old Fella
your assumption is correct. I thank you for your explination, it is very helpful indeed
Joined: Feb 2008
Posts: 1,342
Likes: 0
From: Wingham NSW Australia
Cabin Temp
Cabin temperature and pressure are governed and regulated by controlling the rate at which conditioned air is allowed to be exhausted from the pressure hull. On most aircraft which are pressurised, the cargo hold is also pressurised. The temperature is maintained in the cabin to keep passengers comfortable and some cargo compartments, as well as being pressurised, are also kept warm.
Joined: Aug 2003
Posts: 240
Likes: 0
From: Scotland
Many aircraft have unpressurised equipment bays with avionics gear - it doesn't mind being in a cool place.
If you have an unpressurised and unheated baggage area, it's a good place to keep the beers for when you land.
If you have an unpressurised and unheated baggage area, it's a good place to keep the beers for when you land.
Joined: Feb 2008
Posts: 1,342
Likes: 0
From: Wingham NSW Australia
Keeping the "goodies" cool
CJ Driver. The C130 rear cargo door was a great place to keep the "refreshments" cold. Many a carton of beer and slab of frozen prawns travelled there over the years. In fact, on the C130A which had no 'underfloor heating' system, any fluid spilled on the floor in the area of the ramp hinge would freeze on longer flights at higher levels.
