Originally Posted by
Chris Scott
It may be worth mentioning that full-span (except at the pylons) L/E flaps on B707s are of the Krueger type - unlike the VC10s, all of which have full-span L/E slats.
True - you & I would call them Krueger flaps after the way they deploy. Boeing seems to refer to them as 'slats' however if they maintain a small gap between themselves and the wing LE and thus function in the same way as a fully deployed slat - by accelerating air through the small gap. The 747 has what we'd call Krueger's full span, but I believe Boeing refers to them as Krueger's inboard and slats outboard.