Todd Pattist schrieb:

Not "wrong" but incomplete. The static pressure (from the
static sensor) and the total pressure (static plus dynamic
from the pitot tube) are large numbers. You would need to
calculate the dynamic pressure which is a small number by
subtracting the two large numbers to be able to calculate
the TE pressure that you want. Since the large numbers
come from two different sensors (static and pitot) they have
different errors, and the difference shows those errors. It
is simpler/cheaper and you get better data by using a single
TE sensor at a single point where the errors tend to cancel
out.

But the TE probe also gives a large value (static-dynamic) as the
pitot gives (static+dynamic). So we have a third probe that has it's
own error. It may still be the case that the TE probe gives the better
result because if is in clean air, what may not be the case for the
pitot.
Eggert