Lift Augmentation Flashcards
why is lift augmentation required?
to help aircraft stay airborne at low airspeeds
how does a trailing edge flap affect camber?
increases camber
what does the increased camber of a trailing edge flap do to create more lift?
increased camber results in higher pressure below the wing, creating a higher pressure differential and therefore more lift
lowering the flap (increases/decreases) CL and CD, and (increases/decreases) lift/drag ratio
increases, decreases
trailing edge flaps move the centre of pressure (back/forward)
back
what kind of TE flap lowers entirely, with no changes in chord length?
simple/plain flap
what kind of TE flap lowers the bottom half of the flap but not the top of the flap?
the split flap
what kind of flap increases chord line and lowers completely, creating space to reenergise the boundary layer?
the slotted flap
what kind of flap is split, and increases chord length, while also creating a space to reenergise the boundary layer?
the fowler flap
what is a slat/slot?
an aerodynamic surface on the front of an aerofoil designed to create a slot through with air can flow, in order to decrease drag at high AoAs
what do slats do to the critical angle?
increase it
what are leading edge flaps designed to do?
they increase the camber of the wing in order to generate more lift
what kind of LE flap extends out the front of the wing and is curved?
the leading edge droop
what kind of LE flap folds out from underneath the wing?
krueger flap
what is a combined high-lift device?
an LE flap and a slotted TE flap designed for ATPL aircrafts
