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.

a descent if the ambient static pressure is less than the pressure in the instrument.

a constant rate of climb, even if the aircraft is levelling out.

zero.

an increasing rate of climb if the ambient static pressure decreases.

total pressure.

dynamic pressure.

static pressure.

differential pressure.

The inductivity of the fuel.

The mass of the fuel.

The density-volume of the fuel.

The volume of the fuel.

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.

1,3

2,3

2,4

1,4

Dynamic pressure

Attitude

TAT

OAT

a decreasing rate of climb.

il continues to operate normally.

zero.

a descent.