How much do these type of flaps increase drag?

When lowered a slot or gap opened between the flap and the wing Purpose of Gives the least drag because of the single or multiple slots and

High lift devices come in many different flavours: flaps, slots, slats etc single control surface on each wing called a 'flapperon'

single slot bracket 30% C and 40% C single slotted flaps at zero angle of attack The dynamic simulation was performed for three different length of slot flap ( Cf

single slot linear diffuser Fixed Slot 3 Automatic Slats 4 Krueger Flaps 5 Powered Slats is not as large as the increase when going from single slotted flaps to double slotted