If the pitot and static pipe lines were cross connected at the instrument panel connection, application of pressure to the pitot head would cause the
- altimeter reading to increase, vertical speed indicator to indicate descent.
- altimeter reading to decrease, vertical speed indicator to indicate descent.
- altimeter reading to decrease, vertical speed indicator to indicate climb.
Explanation
With the lines cross-connected, pressure applied to the pitot head is delivered to the static side of the instruments. The altimeter senses this higher static pressure as a lower altitude, so its reading decreases, and the rising static pressure is interpreted by the VSI as a descent. Both instruments therefore behave as if the aircraft were going down.
Majorkidkid asking:
why?
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