Will
Please read what I said carefully... !
AT A GIVEN INCIDENCE
To get the extra lift you have to increase incidence - beyond the max (or stall) incidence without them.. not the case with TE devices
So in themsleves they don't increase lift, but allow for higher incidences without flow breakdown.
The stick-shaker will vary with incidence, depending on the LE device position
Take the Barajas incident... the pilot pulled a (wing) incidence at rotation taking the aircraft into the regime requiring LE slats. They were not deployed -> stick-shaker -> without reduction in incidence -> approach to stall, loss of directional control -> stall. Maybe, if he had taken a less aggressive approach, possibly, he could have fown it off on the shaker, rather than way above. It was the extreme incidence requiring LE devices, that ensured loss of control, not loss or lack of lift per se.
Perhaps a graph showing the effect of flaps and that of LE devices will make it clearer.. a picture is worth a thousand words.
..but its late, my eyes hurt and its time for beddy byes. Ask and it shall be given (later)....
Last edited by HarryMann; 25th May 2009 at 02:00.