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Old 10-23-2010, 02:37 PM   #11
William F. Burgess
Member William F. Burgess is offline
 
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Join Date: Oct 2010
Location: Kamuela  HI
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Re: 1200 ft vs 6800 ft elevation

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Originally Posted by Josh Bailey View Post
Interesting info. I know from experience that when I do Fran here at 9000ft my time is 6:45. When I do it at sea level it is 5:16.
Interesting. So much so I decided to do a little calculation with your data.

From this altitude-barometric pressure conversion site:
wfs http://www.altitude.org/air_pressure.php

At 9000 ft, the standard barometric pressure is 74kPa (554 mmHg). This means that there is 73% of the oxygen available at sea level.

6:45 = 405 sec
5:16 = 316 sec

316/405 = 78%

Close to a linear relationship to available oxygen(+6.8% error). How many days apart did you do the two?

I am curious as to what your time would be at an intermediate altitude.

Last edited by William F. Burgess : 10-23-2010 at 02:40 PM.
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