Increasing Camber or Energy Additions to the Boundary LayerWind tunnelsplitWind tunnelMovable slat
AMT 280 LaboratoryAirfoil Slat & Flap Effects•One of the ways to improve the versatility and flight characteristics of an airplane is to install wing flaps and slats. Flaps are designed so that when extended they not only provide higher lift but also have higher drag. This allows a steep angle of descent at slow airspeeds with but keeps the engines spooled up power output- go-around •Objectives–Observe the effects of the flap and the slat on a model airfoil with respect to lift and drag.–Observe the general airflow pattern over the airfoil while using flaps and slats.–To observe the creation of wing tip vortices
Airfoil Slat & Flap EffectsEffect of high lift devices•The primary purpose of high lift devices (flaps, slots, slats, etc.) is to increase the CLmaxof the aircraft and to reduce the stall speed. •Take-off and landing speeds are also reduced and engines are spooled up.
Krueger/Leading edge flap•Krüger flaps were invented by Werner Krüger in 1943 and evaluated in the wind tunnels in Göttingen, Germany. One of the earliest applications was the Boeing 707 in 1954. •The flap was added to prevent wing stall with an extreme attitude take-off with the tail dragging on the runway, a scenario that had already caused two deHavilland Comet accidents.