due to the efforts of many different individuals and organizations in the 1920s and 30s.

Slotted flaps comprise several separate small airfoils which separate apart, hinge and even slide past each other when deployed. Such complex flap arrangements are found on many modern aircraft. Large modern airliners make use of triple-slotted flaps to produce the massive lift required during takeoff.

Slats and slots

Another common high-lift device is the slat, a small aerofoil shaped device attached just in front of the wing leading

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