There are many types of airplane flaps but they all fall under two categories :-
- leading edge flaps
- Trailing edge flaps
in the leading edge include Plain, slotted and Fowler flaps while in the trailing edge include Krueger flaps, slats, and slots.
TYPES OF FLAP
This combines both leading edge and trailing edge flaps :-
- plain flap – This is the most ordinally plane flap,an airfoils trailing edge rotates around an axis. it increases camber of the airfoil, resulting in an increase in the coefficient of lift.
- split flap – looks just like a plain flap but its dissected at the middle end split in the end.
- slotted flap – it resembles a plain flap but in this case thre is a gap between theflap and wing to allow air to pass through for aerodynamics.
- fowler flap – this is a flap that slides back then hinges down.
- double slotted fowler flap – in this case it looks jus exactly as fowler flap but at this instance its double slotted to allow air to pass in the middle of the flap as shown below.
- junkers flap – on this instance the flap is fixed below the trailing edge of the wing.
- gouge flap – a flap that is split and slides backward on a curved track hence moving the trailing edge downward.
- krueger flap – this is a leading edge flap that folds out from under the wing’s on the front of the aerofoil.
- gurney flap – the wing resembles a junkers flap without the down flap but in this case a small flap stretches downward.
- zap flap – it is a flap that looks like the gouge flap but in this case the flap is in the middle dissected edge of the flap.
- fairey youngman flap – this is a flap that drops down like a junkers flap then slides back and rotates up or down.
The below are not exactly flaps but they when activated they influence movement of an aircraft just like flaps.
- leading edge droop – device that is found on the front of the aerofoil that increases camber and reduces stalling speed.
- Handley page slot – reduces stall speed and allows good low speed maneuverability qualities.
- slats – are found on the front of the aerofoil & perform jobs that are almost similar to leading edge flaps.