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Peter The Piper Uk
Lv 7
Peter The Piper Uk asked in Cars & TransportationRail · 4 years ago

Question about London underground trains please.?

Was on a newish underground train in London today.

There is a pressure gauge visible in the carriage near the 'join' where the train articulates. It is graded 0-10 bar, obviously a mesure of 'pressure'. It seems to read zero with the train moving rising to about 4 when stationary.

Can anyone tell what this gunge relates to and what it is measuring?

Thank you.

Update:

Ok Thanks.....Brake Air pressure.....but why provide a gauge visible to everyone ? Seems unusual.

7 Answers

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  • 0NE TRlCK P0NY
    Lv 7
    4 years ago
    Favorite Answer

    It's the brake air pressure gauge.

  • PQR Theorist
    Lv 6
    4 years ago

    Before the train enters service, the operator applies the brakes then walks through the train to check that there is air pressure showing in each car; this simple test ensures the brakes are working all through the train.

  • Bill
    4 years ago

    It is the car release valve

  • Zheia
    Lv 6
    4 years ago

    It measures overcrowding pressure.

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  • Anonymous
    4 years ago

    Brake pressure indicator.

  • Anonymous
    4 years ago

    I would guess it relates to the pressure in the brake chamber

  • Timbo is here
    Lv 7
    4 years ago

    . Air pressure, measured by the gauge, is used to operate the wheel brakes

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