Copyright © A. Filippone (1999-2003). All Rights Reserved.

High Lift

High-Lift Wing Systems

Technical solutions include strakes, various types of flaps (Kruger flap, Fowler flap, compound flap, split flap, jet flap, etc.), droop nose, ground effect, dams, spoilers, maximum possible speed and lifting area, wing sweep, etc (McCormick, 1994). Fig. 1 below shows a typical wing arrangement on a modern transonic commercial aircraft.

High Lift devs
Figure 1: Some leading edge high lift devices

Leading-Edge Devices

Fig. 2 below shows a few examples of high-lift devices. The most common arrangment is the ventilated slat.

Leading edge devices
Figure 2: Some leading edge high lift devices

An example of lift characteristics for such a lifting configuration is given in the figure below.

Lift Coefficient
Figure 3: Lift characteristics of a wing with a L.E. slat

Trailing-Edge Devices

Some trailing-edge devices are sketched in the figure below.

Trailing-Edge Devices
Figure 4: Some trailing-edge high lift devices

Related Material

Selected References

  • McCormick BW. Aerodynamics, Aeronautics and Flight Mechanics, John Wiley, New York, 1994.

  • Schlichting H, Truckenbrodt E. Aerodynamics of the Airplane, McGraw-Hill, New York, 1979, Chapter 8 (Aerodynamics of the Flaps and Control Surfaces).

[Top of Page]

Copyright © A. Filippone (1999-2003). All Rights Reserved.