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The Collaborative International Dictionary
Aileron

Aileron \Ai"le*ron\ ([=a]"l[-e]*r[o^]n), n. [F., dim. of aile wing.]

  1. A half gable, as at the end of a penthouse or of the aisle of a church.

  2. (A["e]ronautics) A small plane or surface capable of being manipulated by the pilot of a flying machine to control lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane.

Douglas Harper's Etymology Dictionary
aileron

1909, from French aileron, altered (by influence of aile "wing"), from French aleron "little wing," diminutive of Old French ele "wing" (12c.), from Latin ala "wing" (see aisle).

Wiktionary
aileron

n. 1 The hinged part on the trailing edge of an airplane wing, used to control lateral turns. 2 A half gable, as at the end of a penthouse or of the aisle of a church.

WordNet
aileron

n. an airfoil that controls lateral motion

Wikipedia
Aileron

[[ roll.gif|thumb|right|

An aircraft 'rolling', or 'banking', with its ailerons

]] An aileron (French for 'little wing') is a hinged flight control surface usually forming part of the trailing edge of each wing of a fixed-wing aircraft. Ailerons are used in pairs to control the aircraft in roll (or movement around the aircraft's longitudinal axis), which normally results in a change in flight path due to the tilting of the lift vector. Movement around this axis is called 'rolling' or 'banking'.

The aileron was first patented by the British scientist and inventor Matthew Piers Watt Boulton in 1868, based on his 1864 paper On AĆ«rial Locomotion. Even though there was extensive prior art in the 19th century for the aileron and its functional analog, wing warping, in 1906 the United States granted an expansive patent to the Wright Brothers of Dayton, Ohio for the invention of a system of aerodynamic control that manipulated an airplane's control surfaces. Considerable litigation ensued within the United States over the legal issues of lateral roll control, until World War I which compelled the U.S. Government to legislate a legal resolution.

Usage examples of "aileron".

Out upon the other, on hands and knees, clinging desperately to the aileron brace, was the hatless, water-soaked figure of a man.

Finally Aileron put up a hand, his chest so convulsed with laughter that he clearly could barely get a word out.

He looked a bit banged up, and his clothes were still a bit sodden, obviously from having been tossed into the river by Aileron of the Harpers Bizarre.

When she saw Aileron advancing on her, though, she displayed not a jot of fear.

Entipy curled up her legs as Aileron lunged for her, but he missed her clean and crashed through the upper level of the branches.

The pilot reported that he could not use his flaps, and that his elevator control was poor, his right aileron not working and his air-speed and needle-ball indicators shot up.

They now came up over the big dirigible and tried to plant the last two bombs on her broad back, but the Bullet jerked so badly due to the lost aileron, that the bombs widely missed their marks.

They were on the same level now as the first of the two upper flights, which he could see were the new Fokkers, with aileron extensions and the extra lifting surface between the wheels.

And the aileron and rudder controls, and those which governed the pitch and tune of the rotor blades, by whose combined means the little gig could have been brought down to the surface, were out of operation.

This gave Jackson aileron control, and he worked quickly to get back to normal attitude.

This produces a greater suction in the right-hand side of the mercury tube, which draws the mercury up on that side and down on the other, until the proper electrical contact is broken and the ailerons are returned to neutral position.

To the surprise of even two such veteran flyers as John Ross and Tom Meeks, the airplane had gone less than fifty yards when she began to rise as gracefully as a swallow in response to her up-turned ailerons and elevators.

Then he straightened out the ailerons and elevators, and began to run on a level keel.

In this fashion they ran for fifteen or twenty miles on a perfectly even keel, the apparatus automatically working the elevators and ailerons of the craft as various wind currents tended to disturb its equilibrium.

At once the riding became easier, for the moment a gust of wind hit the machine on one side, the elevators and ailerons shifted and counteracted its uneven effect.