Aaaaahh these funny, inspiring colleagues...
Here we go: if your Vp is reduced (hence your margin to stall is increased) by extension of slats, obviously you have created lift. If you create lift, you generate drag...
Next time, descend to Initial Approach altitude. Level off at this altitude at lets say 230 IAS and make a note of the EPR when the engines are stabilized. Extend the slats and note how the EPR increases by 0.15 - 0.20 depending of weight.
Last edited by MD80rookie; 11th Oct 2012 at 07:23.