Definition
The total pressure of the air entering the forward-facing opening of the pitot tube during flight, consisting of the static (ambient) air pressure plus the dynamic pressure caused by the aircraft's forward motion through the air. Pitot pressure is sensed by the airspeed indicator, which compares it against static pressure to display indicated airspeed.
Plain English
The pressure of the air being rammed into the small tube on the outside of the airplane as it moves forward. The faster the airplane flies, the harder that air pushes into the tube, and that push is what makes the airspeed indicator work.
Context Anchor
You encounter pitot pressure when studying the pitot-static system, especially airspeed indicator operation and pitot tube blockages.
Derivation
Named after Henri Pitot, a French engineer who in 1732 invented the tube used to measure the speed of flowing water in rivers. The same principle — a forward-facing tube catching the pressure of an oncoming fluid — is used today in aircraft to measure airspeed.
Why Pilots Care
Pitot pressure supplies the dynamic input the airspeed indicator needs; any blockage or leak produces false airspeed readings that can lead to loss of control.
Grounding Statement
As the airplane moves faster, more air is forced into the pitot tube, and pitot pressure increases.
Intuition Check
Do not think of pitot pressure as engine pressure, tire pressure, or just ordinary outside air pressure. In this context, it means the air pressure from the pitot tube that changes with the airplane’s forward motion.
Example Sentence 1
When the pitot tube iced over, pitot pressure could no longer change with airspeed, and the airspeed indicator began behaving like an altimeter.
Example Sentence 2
Ice forming over the pitot tube inlet caused the indicated airspeed to drop because pitot pressure could no longer reach the instrument.