Linked Questions

6
votes
3answers
2k views

Why doesn't condensation form on the inside of airliner windows?

If outside the aircraft is pretty cold and inside the cabin the air temperature is different, why don't the windows become fogged up on the inside?
15
votes
2answers
7k views

What is this tube connected to a 757 for?

In this photo, there is a 757 at Narita Airport with a tube connected to the belly. Source: Airliners.net The tube is in the middle of the plane. There is a similar question about this tube, but ...
9
votes
2answers
3k views

What are those in the belly of a 747?

In the next picture what are the items circled in red? Photographed by Adrian Pingstone in August 2002 and released to the public domain.
3
votes
2answers
1k views

Why is the temperature of the cabin so low during a flight?

While I understand that at very high altitudes the ambient air temperature is extremely cold outside the aircraft (-56 F), it always bothers me that I find myself sneezing and genuinely uncomfortable ...
30
votes
1answer
7k views

Why is cabin pressure increased above ambient pressure on the ground?

As far as I know at least some (e.g. some Bombardier Dash-8 series) airplanes during takeoff may increase cabin pressure above air pressure on the ground, before starting to decrease it. In one case ...
10
votes
1answer
10k views

What are these elements on the back of a Boeing 737?

I forgot the model of that plane but I believe it's a 737. I labeled each element for clarity. What are they? Click here for high-res.
6
votes
1answer
3k views

What's inside the packs? (Airbus a320)

I have some questions about ATA 21, how packs works?... I mean, what's inside them?, what are their mechanims? And How the warm air becomes into cold air?. (On a airbus A320) I'm starting my major at ...
4
votes
1answer
651 views

Who controls the cabin air temperature?

I understand the B737-800 has two air conditioning packs that handle the temperature of three zones: the cockpit, the fwd cabin and the aft cabin. I understand that which pack is turned on is ...
2
votes
1answer
159 views

How often is the cabin air replaced in A320?

One of the A320 pilots told me that there is an icao rule that air should be replaced every 90 seconds? Is this true ? can someone give me a supporting article for the same
2
votes
1answer
608 views

What is the function of ECS in airplane? [closed]

What is the function of ECS in airplane?
2
votes
1answer
2k views

Where does the final cooling take place in the air cycle machine of the air conditioning system?

On aircraft with an ACM air conditioning, where does the final cooling take place? Is it in the ACM expansion turbine or in the ACM compressor?
2
votes
1answer
445 views

If the cabin temperature controller does not function, does the pilot have to make an emergency landing?

The cabin temperature controller in commercial airlines, controls the cabin temperature. But if for any reason, it does not function, does the pilot have to make an emergency landing, or can he cruise ...
2
votes
1answer
3k views

What are the differences between these types of air cycle machines?

I am MSC student of mechanical engineering and my project is about ACM machine. I have read something about various systems of air conditioning system in aircrafts; simple system boot strap reduced ...
0
votes
1answer
261 views

What is the Hot Air Pressure Regulating valve and what's its purpose? [duplicate]

What does the hot air pressure regulating valve do, yes I know that it regulates hot air pressure but what does that do, create hot air? How does it regulate hot air pressure? I have a picture of ...
1
vote
0answers
669 views

How do the air conditioning packs work for the CRJ 700/900? [duplicate]

Please provide details on how the packs on the CRJ 700/900 work. How does the system use air from the packs to make cold air for the aircraft?

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