Aircraft flap mechanism having compact large fowler motion providing multiple cruise positions

Abstract

An trailing edge flap mechanism with a hinge supported quadrilateral linkage for large Fowler extension, trailing edge variable camber and drooped motion is provided. The trailing edge flap mechanism incorporates a support beam, a flap carrier beam, a first link, a second link, a connecting link and an actuation system. The actuation system is operably connected between a fixed portion of a wing structure and the first link. The trailing edge flap mechanism provides large Fowler motion and good take-off and landing flap positions compatible with drooping spoilers, and also a range of aerodynamically sealable cruise positions, all in a compact package for greatly improved cruise drag.

Description

technical field [0001] Embodiments of the present disclosure relate generally to aerodynamic flap extension mechanisms for aircraft, and more particularly to a compact operative linkage with sufficient linear motion over a small range about the retracted position, but providing large Fowler extension and rapid droop. Background technique [0002] For modern commercial jet aircraft, flaps used with drooping spoilers for takeoff and landing positions and providing a small range of cruising positions are increasingly necessary to improve efficiency. When combined with the need for large Fowler movements, the flap mechanisms required for this highly desirable performance can be deep and wide, and require large aerodynamic fairings that cause excessive cruise drag. [0003] A combination of drooping spoiler landing positions and multiple cruising positions known as "trailing cambers" has recently been introduced in commercial aircraft. Current designs have relatively small wing ...

AI Technical Summary

Problems solved by technology

Larger fairings increase the vehicle's aerodynamic drag

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