Quote:
Originally Posted by Diesel_Dave
Here are the rest of the details:
Distance: 23.8 miles (SSE direction)
Temperature: 66 deg F
Wind: Out of the south at 2 mph with gusts up to 7 mph
Barometer: 29.9 in Hg
Relative Humidity: 96%
Conditions: Overcast
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Dave,
Those MPG's are very impressive!
One thing that should be pointed out is that your actual barometric pressure is not really 29.9.
I see that your location is in Indiana, and thus you are not close to Death Valley, or either of our oceans.
Because of this, your elevation must be higher than sea level, and your actual baro is probably closer to let's say 28.9 or so, if your elevation is close to 1000 feet.
What they report on TV is the "corrected" baro based on subtracting out the effect of elevation on the "actual" baro.
So your actual air density during your MPG run is less than what the TV broadcasts.
It's usually found by taking the broadcast baro and subtracting one inch Hg for every 1000 feet elevation.
Someone located in Denver would actually be at:
29.9 - 5.0 = 24.9 inHg baro
Jim.