re: Commpression checks

[TJCallahan@domain.elided]

In AD v9n19, Fred wrote:

>Here is one to kick around, if I get a high reading at sea level, then 
>drive up to  a 14,000 foot mountain top.  would I get a higher or lower 
>reading then?   Fred

Lower, the air is significantly less dense ("thinner") at that altitude and 
there is less to compress in the cylinder. That's the major reason old piston 
airplane engines were super/turbo charged - to regain the original sea-level 
performance at altitude.

You have 14,000ft mountains in Florida?!?!? I thought those were only 
available here in the Pacific Northwest. :-)

Tom
Seattle
10123
11615
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