Zero Lift angle?

[Av8r3400]

Aren't AOA meters usually calibrated through flight testing?

The meters that I have seen installed used a level forward pitot tube along with a 45 degree down angle AOA tube. Then tweaking adjustments of the down tube were made during flight testing.

[AirFox]

Av8r3400,

Advanced AOA system uses differential pressure ports on the top and bottom of the wing. This way the lift the wing is producing is actually the measurment for the AOA system. This system is supposed to give better AOA indications than the Pitot systems out there. I am looking for the Zero Lift angle in order to locate the pressure ports. Every wing design has it's own Zero lift angle where the wing produces no lift or drag.

Thanks for any help.

Scott