Chapter 16 - Lift Augmentation Flashcards
Which flaps give change in camber
TE
Plain flap does what to the camber, CLmax, Crit AOA and CofP
changes the camber
increases
decrease AOA
moves aft
Split flap does what to CLmax but with a penalty
Increases, lots of drag/ turbulent air
Slat does what to camber, AOA critical and CLmax
Doesn’t change
increases
increases
When a leading edge flap extends it’s called a?
Slat
What does a slat do to CLmax and crit AOA
increases both
What does a slotted TE Flap do to CLmax?
reenergises the boundary layer and increases CLmax
What does the Fowler flap do
Extends the surface area with slots. best flap
What does the krueger flap do to stagnation point
encourages it to a define point, good for inboard.
LE devices are more effective at CLmax than TE?
Yes
What will happen to the lift to drag ratio when flaps are deployed
reduce
When deploying flaps what is the pitching moment for the aerodynamic effect
pitch up because the CofP moves aft
When deploying flaps what is the pitching moment for the downwash effect
pitch down because the downwash makes the tail plane less effective
Vortex generators do what to a wing
add more energy using vortices
Strake / Chime is found where
Engine
Strake only is found
On the airframe
Do not retract flaps after TO until
safe speed and height is attained
when you retract flaps what should you do to AOA
increase to maintain lift
First 50% of flap deployment has what effect on CL
more than half is created
The second 50% of flap deployment has what effect on Drag
The most
Which is more dangerous for asymmetric deployment out of slat and flaps
flaps
