- #1

sqrt_9

- 3

- 0

Hi!

I'm breaking my head about the following problem:

Consider an A/C at a certain velocity flying at a certain altitude. The A/C measures it's speed via the difference in total- and static-pressure and applying bernoulli.

Now the aircraft accelerates. What happens?

At this point I get uncertain and look forward to hear your opinions:

- I assume that the measured static pressure drops

--> measured velocity increases (no problem)

--> But: static pressure drops: altitude decreases (big problem!)

The other opportunity would be:

- The total pressure increases

--> The static pressure remains constant & only dynamic pressure increasesEdit: Additional fundamental question:

Does a static pressure sensor see reduced static pressure if a flow is doubled in speed? If yes, this would again mean that the static pressure sensor indicates lower altitude due to higher velocity...

Thanks in advance!

I'm breaking my head about the following problem:

Consider an A/C at a certain velocity flying at a certain altitude. The A/C measures it's speed via the difference in total- and static-pressure and applying bernoulli.

Now the aircraft accelerates. What happens?

At this point I get uncertain and look forward to hear your opinions:

- I assume that the measured static pressure drops

--> measured velocity increases (no problem)

--> But: static pressure drops: altitude decreases (big problem!)

The other opportunity would be:

- The total pressure increases

--> The static pressure remains constant & only dynamic pressure increasesEdit: Additional fundamental question:

Does a static pressure sensor see reduced static pressure if a flow is doubled in speed? If yes, this would again mean that the static pressure sensor indicates lower altitude due to higher velocity...

Thanks in advance!

Last edited: