PPRuNe Forums - ATPL question

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General Mutley

2nd March 2010 09:46

ATPL question

regarding a float type fuel gauge. Surely atmospheric pressure would affect the reading as the volume of the liquid would change with higher/lower pressure depending on altitude?
It does'nt appear as a factor in any of the lists in my reference material but it did pop up on a CAA exam.
Any thoughts please - thanks :ok:

Keith.Williams.

2nd March 2010 10:53

Remember that liquids are effectively incompressible.

So the changes in pressure that are caused by changes in altitude will not change the volume of liquid fuel.

General Mutley

2nd March 2010 11:11

thankyou:ok:

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