"mah" wrote in message
...

Just as an example, when the aircraft is sitting still on the ground -
airspeed = 0. Since the pitot and static ports are in the same state,
doesn't that imply that static pressure is present at the pitot port?

Sure, unless:
1) The aircraft is moving
2) The wind is blowing
3) Either 1) or 2)
4) Both 1) and 2)

At that point the pressure is no longer static - so you need a static
port.
IIRC in fact, for an aircraft to be certified for IFR it has to have an
alternate
static source *as well*. Pitot pressure ceases to be equal to static
pressure
once the air is in motion relative to the port.
Whether the air moves on its own or the plane moves
through it is irrelevant.

The CO

MAH