ORIGINAL: JackL
The outer slats aren't fixed. They are hinged at the leading edge and rotate around the hinge line, with the effect that the leading edge of the flap moves up and down. They do not slide front to back as other slats, but rather rotate around the axis of the hinge line.Here is a better shot showing the hinges at the front.
Interesting stuff. The plan view doesn't really change because the slats are always extended and always open which is why I believed them to be fixed. But although they can rotate a little around that hinge point they are always open, the fence at the inboard part shows shows the minimum position. The max position will be just a bit more open by rotating the leading edge down a bit thus raising the gap at the slat's trailing edge. This diagram which is of the F-4S is probably much the same as the E and shows how little the change is.
http://tailspintopics.blogspot.co.uk...f-4s-wing.html
You would have to be incredibly sharp eyed to tell any difference on a model!