Quote:
Originally Posted by bluebunny
Yup. At minimum yaw, there is significant additional drag associated with a slot. At otherwise large yaw stall conditions, the slot delays separation, and during delay separation, drag is significantly reduced. My original premise was that an abrupt, minimally radiused 90 degree bend to the flow is locked in at high yaw conditions, regardless of vehicle speed.
(Dang edits, I'll never reply via phone again...)
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I think you're confusing yaw with angle of attack.
When a wing stalls,it has exceeded it's design angle of attack,has gone beyond burble point,and has full separation over it's top.
An aircraft does not fly in 'yaw',except for crosswind,where a pilot must crab to stay on course,but the lift/drag effect on the wing is moot.
Your slot may reduce drag,compared to a sharp,90-degree leading edges,but a leading edge of the same 'outside radius will have lower drag.
Slots are only for high-lift,short field landings and takeoffs,Otherwise they're pure drag.