Air Travel Myths

[Gumbo Robot]

Quiz

I'm probably thick but could somebody explain the answer to question 7

Edit - I guess the doors open inwards. Never noticed :

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[FatLazyContractor]

14

MF will probably score 20

[suityou01]

Quiz

I'm probably thick but could somebody explain the answer to question 7

Edit - I guess the doors open inwards. Never noticed :

12

No probably about it.

[Gumbo Robot]

No probably about it.

Oh we'll see who's laughing on Saturday ;-)

[vetran]

Quiz

I'm probably thick but could somebody explain the answer to question 7

Edit - I guess the doors open inwards. Never noticed :

12

Fear not – the altitude means there's an extraordinary amount of pressure pushing against the door from the outside. Even Arnie couldn't manage it.

outwards from that and memory

[BrilloPad]

I expected a bowl of spaghetti to appear somewhere.

[clearedforlanding]

Quiz

I'm probably thick but could somebody explain the answer to question 7

Edit - I guess the doors open inwards. Never noticed :

12

Nope.

https://www.youtube.com/watch?v=WLIPXWVbEDw

At a cruise of 35,000 feet we need to keep the cabin pressure below 75.8 KPA (11 PSI), the ambient pressure at 8000 feet. A main door slides on the horizontal plane and are locked & sealed on the vertical. At 35,000 feet, the ambient pressure is about 24.8 KPA (3.6 PSI) if the average door is 8 square feet, the pressure exerted on the door is about 4.25 tons.

The reason for the 8000 foot cap is to avoid nasties like altitude sickness, decompression sickness, hypoxia etc.

Newer commercial jets are somewhere in the range of 6-7000 feet equivalent cabin pressure & some executive jets are in the 4000 foot range.

[Gumbo Robot]

Indeed. At a cruise of 35,000 feet we need to keep the cabin pressure below 75.8 KPA (11 PSI), the ambient pressure at 8000 feet. The emergency exits do indeed open inwards, but a main door slides on the hosrizontal plabe and is the locked & sealed on the vertical. At 35,000 feet, the ambient pressure is about 24.8 KPA (3.6 PSI) if the average door is 8 square feet, the pressure exerted on the door is about 4.25 tons.

The reason for the 8000 foot cap is to avoid nasties like altitude sickness, decompression sickness, hypoxia etc.

Newer commercial jets are somewhere in the range of 6-7000 feet equivalent cabin pressure & some executive jets are in the 4000 foot range.

That's equivalent to an altitude of 2500 metres... No wonder flying can make you feel so groggy

[clearedforlanding]

That's equivalent to an altitude of 2500 metres... No wonder flying can make you feel so groggy

That and we turn up the cabin heat when people are getting a bit too tipsy on flights to the FSU to send them to sleep.

FYI the A380 & 767 can hold it at 6000 feet which makes for a much nicer experience.

[d000hg]

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