Bill Daniels wrote:
"Marc Ramsey" wrote in message
. com...
I suspect that surface ports on the top and bottom of the nose will also
only work at zero slip/skid angle. Marc

Why would that be?

If both top and bottom ports are on the center line they should be equally
influenced by slip/skid induced crossflow. You'd just be measuring the
pressure difference between the ports not the absolute pressure.

I'm only engaging in standard usenet-style uninformed speculation, but
I'm guessing that the flow around the nose is altered such that the
pressure differential would no longer be consistent with the angle of
attack. Also, if putting two ports on the nose was adequate, why did DG
go to the trouble of putting 4 ports above the wings?

Marc