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Plain flaps, slotted flaps, and Fowler flaps are the most common. Krueger flaps are positioned on the leading edge of the wings and are used on many jet airliners. The Fowler, Fairey-Youngman and Gouge types of flap increase the wing area in addition to changing the camber.
Born Harlan Davey Fowler on June 18, 1895 in Sacramento, California. As a teenager he built Man-lifting kites. [4] He married twice and had two children. Fowler's aeronautical engineer career started in 1917 with the Signal Corps and he worked in the engineering division as assistant engineer in charge of design at McCook Field in Dayton, OH. [7]
Top left: All surfaces at neutral position; Top middle: Right aileron is lowered; Top right: spoilers raised during flight; Middle row: Fowler flaps extended (left), extended more (middle), hinged with inboard slotted part hinged even more (right); Bottom row: spoilers raised during landing
Variations include plain, slotted, and split flaps. Some, such as Fowler Flaps, also extend rearwards to increase wing area. The Krueger flap is a leading-edge device. Cuff: an extension to the leading edge which modifies the aerofoil section, typically to improve low-speed characteristics.
Krueger flaps deployed from the leading edge of a Boeing 747 (top left and right in photo). Krueger flaps, or Krüger flaps, are lift enhancement devices that may be fitted to the leading edge of an aircraft wing. Unlike slats or droop flaps, the main wing upper surface and its leading edge is not changed. Instead, a portion of the lower wing ...
In this picture, the slats are drooped. Note also the extended trailing-edge flaps. Slats on the leading edge of an Airbus A318 of Air France Automatic slats of a Messerschmitt Bf 109 The wing of a landing Airbus A319-100. The slats at the leading edge and the flaps at the trailing edge are extended.
In general, blown flaps can improve the lift of a wing by two to three times. Whereas a complex triple-slotted flap system on a Boeing 747 produces a coefficient of lift of about 2.45, [6] external blowing (upper surface blowing on a Boeing YC-14) improves this to about 7, [6] and internal blowing (jet flap on Hunting H.126) to 9. [7]
The triple-slotted trailing edge flaps are well displayed and the Krueger flaps on the leading edge also are visible. In aircraft design and aerospace engineering, a high-lift device is a component or mechanism on an aircraft's wing that increases the amount of lift produced by the wing. The device may be a fixed component, or a movable ...