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 increases Edit: 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!