NACA 23012 airfoil with single slotted flap

Airplane with working fowler flaps and leading edge slats [images single slot flaps McCormick notes that the optimal deflection angle is around 40 degrees for single slot flaps For other types the single slot shelving Flaps Plain Flaps

single slot grill -2 airfoil with aileron, slotted flap, Fowler flap and slot-lip spoiler configurations According to the author, when it comes to single slotted flaps