Up Up and Away

[Orin Eman]

> Note how I completely left out the throttle position. It may be that
> at 15,000 feet ASL the WOT pressure will be only 70 kPa. If the engine
> is at 3000 rpm and the air temp is the same the Volumetric efficiency
> of the engine is the same. 

What about effects on exhaust back pressure caused by lower
barometric... I'd think it would reduce the residual pressure
in the cylinder at the end of the exhaust stroke, allowing more
air in for a given MAP.

Orin.