" Lets say your at an EAA flyin and you see a homebuilt with a pitot tube mounted on top of the wing right at the high point of the airfoil... and along side of that pitot tube there is a static port also on the high point of the airfoil. What do you think the airspeed indicator and altimeter would read? What would the pressure be at the pitot, what would the pressure be at the static port... what is the total pressure at that position on the wing? That is what I am talking about".
I would have hoped such a thing had been trucked in, not flown in!
With the static port at the peak of the airfoil. the pilot -might- notice his altitude is changing rapidly when taking off, while the wheels haven't left the ground.The instrument readings would be gibberish.
That something like this could be done isn't surprising.
One of our C-130 mods necessitated an APU for the extensive electronics suite be placed in the left main mount fairing.
On the first takeoff after all the mods had been done, the airspeed and altitude went berserk! Fortunately the plane had been equipped with a flight test airspeed system using a trailing cone for the static pressure and a seperate total pressure probe for airspeed. Switching immediately to the flight test system fixed the instrument problem for that flight.
The cause was the production static port for the C-130 was located in the left main mount fairing, not far from the NACA duct for the APU. A little bit of airspeed allowed the APU inlet to seriously disturb the air at the static port.
Finding THE spot for the static port is quite important.
I guess your C-150 has it wrong.