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static vents on the fuselage

Asked by: 3326 views Aerodynamics, Aircraft Systems, Instrument Rating

Hello ,

I was looking for an explanation to this question ,

When an aircraft employs static vents either side of the fuselage to minimize pressure errors it is
called

Static equalization ? can anyone help me , kind of new question to me :( 

 

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1 Answers



  1. R. Anderson on May 04, 2017

    Depending on the airplane type and design more than one static port may be incorporated by the manufacturer. The function of the static port, as I’m sure you are aware, is to provide static/ambient air pressure data to onboard instruments (e.g., airspeed indicator, vsi, etc.).

    Sometimes there is a primary static port and an alternate, a single static port co-located on the pitot tube, or two (or more) static ports located somewhere on the fuselage. The manufacturer will try and maximize the accuracy delivered to the aircraft’s instruments by positioning static port(s) on the aircraft in such a location as to avoid transient or non-correctable static/ambient air pressure entering the system.

    In addition to the redundancy benefit, a static port on both sides of the fuselage, feeding a single system, can smooth out (equalize) static pressure fluctuations generated when the aircraft yaws.

    Also, on some airplanes (large turbojet, etc.) multiple static ports provide independent ambient pressure data to the pilot and co-pilot’s separate instruments (two or more totally independent systems).

    I’m sure others can provide additional insight, but the above represents my understanding.

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