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Old 18th Feb 2011, 23:00
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SimFlightTest
 
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What gets considered as static pressure or total pressure depends on the context.

For an aircraft flying through the atmosphere, then static pressure is the same as the ambient pressure, and total pressure is the sum of this static pressure plus the dynamic pressure resulting from the aircraft accelerating the surrounding air to the same velocity as the aircraft.

For an aircraft in a wind tunnel (open return) with the air traveling past it, then total pressure is the pressure of the ambient air in the room containing the wind tunnel and the static pressure is a pressure below this ambient pressure value based on how fast the wind tunnel is moving the air.

The situation gets complicated beneath a rotor because the rotor adds energy to the flow, hence increasing the total pressure.
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