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Old 7th January 2008 | 23:31
  #34 (permalink)  
llanfairpg
 
Joined: Mar 2006
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From: heathrow
Oxygen "levels" stay the same no matter how high you go. The % of o2 in the air remains more or less constant.
Yes but the weight of that same percentage is less, which reduces volumetric efficiency--try climbing Everest without oxygen
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