Blown Flap
Blown flaps are a powered aerodynamic high-lift device invented by the British and used on the wings of certain aircraft to improve low-speed lift during takeoff and landing. The process is sometimes called a boundary layer control system (BLCS). They were a popular design feature in the 1960s, but fell from use due to their complex maintenance needs. Today a simpler version can be found on military transport aircraft, although the term is not widely used. Additionally, the early concepts have been built upon by modern engineers to create the circulation control wing, a far more effective device with applications in the modern aviation industry.
Famous quotes containing the words blown and/or flap:
“I climb to the tower-top and lean upon broken stone,
A mist that is like blown snow is sweeping over all,
Valley, river, and elms, under the light of a moon
That seems unlike itself, that seems unchangeable,
A glittering sword out of the east.”
—William Butler Yeats (1865–1939)
“Let Sporus tremble—‘What? That thing of silk,
Sporus, that mere white curd of ass’s milk?
Satire or sense, alas, can Sporus feel,
Who breaks a butterfly upon a wheel?’
Yet let me flap this bug with gilded wings,
This painted child of dirt, that stinks and stings;
Whose buzz the witty and the fair annoys,
Yet wit ne’er tastes, and beauty ne’er enjoys:”
—Alexander Pope (1688–1744)