b737 flaps/slats
hello capt greaser,
for the boeings, kruger flaps inboard & slats outboard, it' s all about stall behavior.
first mr boeing, for obvious reasons, doesn' t want us to stall their aeroplanes, hence the high lift devices(kruger/slats) on the leading edges & fowler flaps at the trailing edges, for slow speed flight.
if we do however insist, they want the wingroot(inboard) to stall before the wingtips(outboard), so that aileron control is not lost first.
kruger flaps by design are less stall resistant than slats, which have among other things, the added benefit of the gap effect(accelerating air à la bernouilly) between the wing leading edge & the deployed slats.
douglas with the dc10 achieves same with wing washout, the wing at the root has by design, a greater angle of fixed incidence(angle between longitudinal axis & wingchord) than the wing at the tips, so again root stalls before tips do. you can clearly see this wing twist, when viewing a dc10/md11 for that matter, from the rear.
kind regards,
bm,