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Flight query about cabin pressure


CurlyWhirly
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I have never flown before but am flying to Majorca in October.

My partner (who has flown before) said that on take off I should suck a sweet to avoid a ringing sound in my ears caused by the change of air pressure.

What I can't understand is how the cabin air pressure changes as all planes are airtight ?

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morddwyd

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If you are prone to catarrh, or you have a head cold, the discomfort can be worse.

Take a decongestant about an hour before you go, and another one before landing if the flight is long enough (like Australia, not Majorca!).

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CurlyWhirly

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carver, I see now so the flight times are roughly the same on both journeys due to the local time factor.

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muddypaws

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Nothing to do with the jet stream--that affects the weather.

I think you will find that the arrival time is shown as Majorca local time, but the flight time remains the same.

Actual flight time is 2hrs 40 mins.

Majorca time is one hour ahead of UK.

e.g Leave UK 6am, flight time arrival = 8.40am, add one hour for time difference = 9.40am arrival at Majorca

So flight appears to take 3.40.

Apply the reverse on the return journey.

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muddypaws

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Oops, sorry didn't see pages 2 & 3.

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CurlyWhirly

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Cheers muddypaws

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Woolwell

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"Nothing to do with the jet stream--that affects the weather." Jet steams do affect the weather but have a significant influence on on aircraft routing and flight times. Flights across the Atlantic take advantage of it from USA to UK and it reduces flight times. Going the other way then flights have a headwind. See E-How.

This is an east-west influence and has little to do with a flight to Palma.

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Woolwell

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muddypaws

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Woolwell

I was aware of that, but kept it brief as I assumed CurlyWhirly wasn't going the long way round!! (:-}}

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chub_tor

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Just to confirm Woolwell's point, it is a good hour longer flying out to Dallas than coming back to the UK. We do this two or three times a year and I always wish that the time difference worked the other way round. I could do with a longer sleep on the way back and a shorter flight on the way there.

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WhiteTruckMan

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FE

"The reason for this is to reduce stress on the pressurised section of the fusilage."

That's a myth. The fuselage of a modern passenger aircraft is built to withstand cabin pressure changes, and can easily handle the stresses involved

An airframe has a finite life. Every takeoff/landing cycle inflates the pressurised section like a balloon, only not as noticeable. Every time you distort metal, fatigue takes place, even though it may not be visible to the naked eye. In fact the science (I used to think of it as a black art when I was mending aircraft) of non destructive testing (NDT) is a highly specialised trade in itself. But I digress. Inflation/deflation of a balloon will eventually leave it ragged and floppy. You can increase the number of times you can blow up the balloon by not blowing it up as much. Also, the length of time it remains inflated does not significantly alter the life of the balloon. Hence a long haul aircraft suffers significanly less wear and tear than a short hop commuter. This was illustrated all too dramatically when a 747 went down I think somewhere in japan. The crash was shown to due to a failure of the rear pressure bulkhead (a dome like structure). The aircraft was subsequently shown to have an abnormally high takeoff/landing cycle.

WTM

(BTW CurlyWhirley, enjoy your holiday.)

WTM

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