Ferrari Mailing List: Re: One for my fellow engineers...

[Rick Moseley (ramosel]

Doug,

I don't drink coffee...  specious question <grin>

Water still boils at 8000ft... but at what??  196° or something like that.   More than enough to scald you in a few seconds.

I think one of the selling points of Boeing's 787 was they dropped the cabin pressure equivalent down to 6000 ft.  But that would only make.... 4° (or 5°) difference in boiling point.  I'm sure there are better reasons for the reduced altitude equivalency.   That was not a cheap upgrade.

At altitude you also are exposed to much more radiation (solar). 

Rick

(not a "captain" of the air...  left Navy and quit flying as an O4)

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From: Doug & Terri <dnt [at] dock.net>
To: Rick Moseley <ramosel [at] pacbell.net>
Cc: 'The FerrariList' <ferrari [at] ferrarilist.com>
Sent: Friday, September 11, 2015 2:13 PM
Subject: Re: [Ferrari] One for my fellow engineers...

Hans says “Got 100%  (the water boiling thing is familiar to those of us who cook....)”

 

Ayep, right on Hans – and that’s why if you want to boil some water for you morning oat meal at 9,000 feet you have to bring a pressure cooker.

 

So here’s a question for good captains of the air - - - how do flight attendants boil water for that ever fine and delicious in the air instant coffee?  Cabin altitude is 8,000 feet.

 

Another thing that doesn’t work well at that altitude (other than your body) is a vacuum cleaner.

 

DOUG

 

 

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