Posted for "Steve Richard" <steve@oasissolutions.com>:

Sorry I wasn't clearer in my message......The 'bitching betty' I was talking
about is coming from the Chelton not the AOA.

Steve

[That's ok. It further underscores my point.... I don't believe the Chelton AOA indication has any way of determining actual wing loading, so it's going to be pretty hard pressed to give you accurate AOA information at anything but the single wing loading sample that was used to develop its calibration data. If that AOA info came from a lightly-loaded set of data points it would be suicidal to attempt to use it when flying at gross. If, OTOH, the data came from a heavily loaded wing loading situation the AOA warnings are going to start long before you are anywhere near the aircraft's critical AOA. To further complicate the issue, as soon as you lower the flaps you have effectively installed a different airfoil on the airplane and it has its own L/D curve with its own set of AOA data... that's why the PSS/AFS AOA instrument looks at the flap settings and acutally requires a separate calibration to account for that different airfoil. <marv> ]