Why did my yoghurt burst?
Joined: Aug 2007
Posts: 42
Likes: 0
From: Swindon
Never noticed it before but when I flew to Tenerife this year, I took out a packet of crisps (Walkers of course) from my hand baggage and it was blown up lke a balloon. I reckon another couple of thousand feet up it would have gone "bang" ! That would have been fun. Decided not to open it to see what happened next but on landing - it returned to normal size as you might expect. Must be good seals on Walkers crisp packets.
Joined: Jun 2002
Posts: 3
Likes: 5
From: Wor Yerm
A typical hold altitude for pressured aircraft is just over 8,000'. Newer aircraft like the 787 will lower that to about 6,000'. Sealed products like crisps will appear to inflate but yoghurt, even in sealed tubs, if upside down will be pushed out of the container by the residual air inside. Air pressure at 8,000' is approx. 11 psi. The air was captured at 14 psi, therefore the pressure on the yogurt was 3 psi. Solution? Don't carry yoghurt or buy a better container.
Joined: Sep 2005
Posts: 280
Likes: 0
From: Scotland
Why did my yoghurt burst?
I can't actually believe this has already covered two pages. Well done. Not sure which is more baffling. The fact it leaked to to reduced cabin pressure or the fact it was being carried at all.
Joined: Jul 2013
Aviation Qualifications: Non-Aircrew
Posts: 5,677
Likes: 3,337
From: Everett, WA
I go skiing in Breckenridge, Colorado on a regular basis. The community of Breckenridge is right at 10,000 ft. (the place we usually stay is a couple hundred feet higher).
It's mildly entertaining to walk down the aisles in the local grocery store and see all the bulging packaging of the items that were packaged at sea level
.
It's mildly entertaining to walk down the aisles in the local grocery store and see all the bulging packaging of the items that were packaged at sea level
.
Joined: Nov 2013
Posts: 69
Likes: 0
From: apogee
I would dearly love to bring British and Welsh bacon back here but they won't let me even for personal consumption only. And it doesn't burst. Have to content myself with a couple of parting bacon sarnies for in-flight. Usually beats the offered meal.
