Flap Track Fairings

Before we begin, here is some vocabulary.

  • Fairing
    Cata-Vento
  • Underneath
    Embaixo
  • Conducted
    Conduzido
  • Alter
    Alterar
  • Across
    Tranversalmente
  • Drag
    Arrasto
  • High Level
    Alto Nível
  • Role
    Papel
  • Screws
    Parafusos
  • Turn
    Virar
  • Stall Speed
    Velocidade de Estol
  • Therefore
    Portanto

Flap track fairings are the canoe shaped pods that can be found underneath the wings of large commercial and military aircraft.

Aerodynamically they play a very important role for flight conducted at transonic speeds (aproximately between Mach 0.7 and M 1).
Very simply they alter the flow of air is it passes across the wing to reduce the high level of drag that is found at these speeds.

They do not store fuel!

(If anybody would like to write more about the aerodynamics of flap track fairings, we will happily correct your English and post to the site)

They also perform a more fundamental role in protecting the flap acuators, which are large screws that turn on order to retract the flaps,
Which are essential for reducing the stall speed of the aircraft and therefore maintaining lift during slower phases of flight.