QUOTE (rob balsamo @ Jan 14 2010, 08:53 AM) 
<snip>
Also, i think i now recall the conversation regarding an explanation for AOA indicating negative for level.
Stall of an aircraft is based on angle of attack only. You can stall an aircraft at any speed, weight, CG.. .etc. The angle of attack at which a wing stalls remains constant. This is called the critical angle of attack. This might be the reason AOA is calibrated the way it is in the data.
For example, if this data was proven to come from a 757, the 757 has a specific AOA at which the wing stalls. I personally dont know what it is and dont really feel like looking it up, but lets say it's 16 degrees. The AOA in the data may be calibrated to where 0 AOA means aircraft stall. Now, this doesnt mean the data was calibrated to a 0 degree stall indication as i do see some instances where the AOA is 0 (mainly on departure where the slats and flaps would be out changing the critical angle of attack needed for stall), but this may explain why the AOA shows -15.6 (or thereabouts) for level AOA.
In other words, any AOA indication showing positive is a stalled or near stalled condition? Sounds plausible to me.
<snip>
I see a post by celestrin on J.R.E.F. which comes to the same conclusion.Also, i think i now recall the conversation regarding an explanation for AOA indicating negative for level.
Stall of an aircraft is based on angle of attack only. You can stall an aircraft at any speed, weight, CG.. .etc. The angle of attack at which a wing stalls remains constant. This is called the critical angle of attack. This might be the reason AOA is calibrated the way it is in the data.
For example, if this data was proven to come from a 757, the 757 has a specific AOA at which the wing stalls. I personally dont know what it is and dont really feel like looking it up, but lets say it's 16 degrees. The AOA in the data may be calibrated to where 0 AOA means aircraft stall. Now, this doesnt mean the data was calibrated to a 0 degree stall indication as i do see some instances where the AOA is 0 (mainly on departure where the slats and flaps would be out changing the critical angle of attack needed for stall), but this may explain why the AOA shows -15.6 (or thereabouts) for level AOA.
In other words, any AOA indication showing positive is a stalled or near stalled condition? Sounds plausible to me.
<snip>
Warren.
) of the forum to change it to "the govt loyalist site" as a bit of satire, and to get their panties in a bind when they try to link to their BS from here (they're not smart enough to figure out the code tags..lol).