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Aircraft general knowledge

If the static inlet is blocked by ice or something else, there are usually alternative

inlets, e.g. from the cabin. If this were not the case, the altimeter and variometer

would remain in the positions they had when the inlet was blocked.

Here you can see a schematic diagram of the pitot-static system.

PS. Now it says "dynamic pressure inlet", but you also get the static pressure in the pitot tube,

and if you were to be completely correct, it should be called "total pressure". In the airspeed
indicator, the pressure can is surrounded by static pressure, so the instrument will let this

correspond to the part of the pressure from the pitot tube that is static pressure, and then you
have the dynamic pressure left.

Simulator showing the pitot-static system

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8.12.5 Airspeed indicator (ASI)

The aircraft's speed is measured with an airspeed indicator.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 768