Lift Augmentation Flashcards
Is a thicker or thinner wing better at low speed flight?
Thick.
True or false, flaps are for increasing lift?
False.
True or false, flaps are for increasing lift?
False.
What happens to the C CRIT on a plain flap wing compared to a clean wing?
It becomes smaller.
What happens to the angle of attack for the same CL max on a plain flap wing compared to a clean wing?
It becomes lower.
What initially happens to the angle of attack when flaps are extended and why?
Down wash increased so greater downforce.
What eventually happens to the angle of attack after flaps are deployed and what benefits does this have for visibility?
The nose points down and you can see the runway.
What type of flap is a hinged surface that increases camber but causes large amounts of wake turbulence?
Split flap.
What flap allows for high energy air from under the wing to reach the upper surface and re energise the boundary layer?
Slotted flap.
What flap extends rearwards and downwards in multiple sections?
Fowler flap.
Slotted flaps delay the separation point. How does it do this?
By re-energising the boundary layer.
True or false : slats increase camber?
False.
How do slats work?
The allow high energy sir to re-energise the upper surface boundary layer.
What does a variable camber flap look like?
Leading edge drooped forward.
Why is a Kruger flap purpously worse that a variable camber flap?
Promote stalling at the wing root.
What the pros and cons of using less flaps for take off?
Longer runway usage but better climb performance.
What would happen if a pilot retracted flaps immediately after take off?
Sink or stall.
Why are jammed retracted flaps an issue?
Harder to descend and a poor view of the runway and higher Vstall.
What do wing tip breakers detect?
Asymmetric flap fail.
What will happen if asymmetric slats occurs?
A yaw moment.
slat asymmetry causes a x moment, whereas flap asymmetry causes a x moment.
Yawing - rolling
