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[frashdog]

[ QUOTE ]
Quote:
“now is this with the tailgate up or down?”
“…really humid air due its high density.”

Dave says:
Good grief!


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The tail gate was a joke [img]/ubbthreads/images/graemlins/grin.gif[/img]

The formula one deal I misunderstood. Humid air is actually less dense than dry air. The issue had to do with the pressure differences generated off their air spoilers creating water vapor.

[ QUOTE ]
If you look at the performance data on planes, most will make the same speed at a lower power setting at higher altitudes where the air is less dense. Trucks should get good MPG at higher altitudes but higher altitudes generally mean mountains and grades.

[/ QUOTE ] as for planes doesn't the dense cold air make them super effecient, yes there is a trade off with the lower o2 and lower resistance at higher altitudes. I feel the low resistance being the winner at high altitudes.

Though, I have heard of jet planes making much much greater than normal thrust at low altitudes during -30ish weather.

Cold dense o2 rich air feed into our turbos, cheap horse power?

I could go either way on this one,
let's email mythbusters [img]/ubbthreads/images/graemlins/grin.gif[/img]