A kind of echo sound comparing velocity of sound with indicated speed.

indicated speed and altitude using a speed indicator equipped with an altimeter type aneroid.

Indicated speed (IAS) compared with true air speed (TAS) from the air data computer.

An ordinary airspeed indicator scaled for Mach numbers instead of knots.

An accelerometer to temporarily change the pressure in the capsule.

A piston to temporarily change the diameter of the metering unit.

Information from an air data inertial reference system.

An accelerometer mechanically linked to the capsule, to expand it faster.

total pressure.

dynamic pressure.

static pressure.

differential pressure.

decreases steadily

increases abruptly towards VNE

decreases abruptly towards zero.

increases steadily

1,3

2,3

2,4

1,4

ratio Pt7 / Pt2.

ratio Pt2 / Pt7.

the twist of a torque shaft of a known length.

change in frequency between the torque shaft and the reference shaft.

steadily decrease until the minimum value that can be indicated is reached.

be correct, provided the aeroplane maintains its altitude.

be correct during unaccelerated climb.

decrease during climb and increase during descent.

smoke detector.

turbine temperature probe.

vibration detector.

pressure sensor.

a single-phase generator connected to a synchronous motor.

a permanent magnet turning inside a non magnetic drag cup.

a three phases generator connected to an asynchronous motor.

a single-phase generator connected to an asynchronous motor.

Dynamic pressure

Attitude

TAT

OAT