How To Determine Density AltitudeThe exact equations for calculating density altitude in ... programming a required percentage correction into the base fuel map according to density changes. ...

Bernoulli's equation along the streamline that begins far upstream of the tube and comes to rest in the mouth of the Pitot tube shows the Pitot tube measures the stagnation pressure in the flow.

where t stands for any time at all (e.g., if t = 6, N(6) = 26[N(0)]).. Finally we note that this equation was derived from the specific situation shown in Figure 1, where one division per day was ...