Static Pressure is sometimes referred to as Kollsman Window

As air becomes less dense, lift reduces because the propeller is less efficient in thin air.

Airspeed Indicator compares the information given by the static port and the pitot tube.

Vitesse Is defined as “Speed in a particular direction”.

Absolute Altitude is the altitude in which pilots tune in above the transition altitude to give them a standard separation reference.

Static Pressure is barometric pressure in the local area.

Stall speed is the slowest speed a plane can fly to maintain a level flight.

In the Lift formula, the Wing Surface Area is the factor that we can control.

Never-Exceed Speed (Vne) is the Lower limit Range of the Yellow Arc.

If the aircraft starts to climb the aneroid wafers will expand due to the less static pressure.

The Cross Hatched flag indicates that the altitude is below 10,000 feet.

Both openings in the pitot tube need to be checked prior to flight to ensure that neither is blocked.

Ground Effect is defined as a sudden reduction in the lift generated by an airfoil.

Maneuvering Speed (Va) is the indicated airspeed at which the airplane travels the greatest horizontal distance for the amount of altitude lost when the engine is turned off.

The Altimeter is the only instrument that uses the Pitot-tube and Static Port to operate.

Calibrated Airspeed is corrected for installation error and instrument error.

In a Vertical Speed Indicator, the area outside the diaphragm, which is inside the instrument case, is also connected to the static line, but through a restricted orifice called calibrated leak.

The Vertical Speed Indicator (VSI) is Also called the Vertical Velocity Indicator (VVI) or Variometer in some references.

To check your ASI during takeoff the Needle will initially point to zero.