In article ,
"J.Kahn" wrote:

Does the presence of the
slot in the flap move the overall wing CP forward or aft vs the
unslotted flap at a given angle? This is what I'm having trouble
finding out. I would think that the presence of the slot imcreases the
pressure gradient and moves it more aft than the plain one, so that the
pitching moment is increased.

AS Stealth Pilot posted, the purpose of the slot is to energize the flow
over the flap.

A better question is, what are the relationships between center of
pressure (CP) and center of lift (CL)?

Do they differ?

Why do they differ?

Under what conditions do they coincide?