[rŭd́ər]
(n.)A vertically hinged plate of metal, fiberglass, or wood mounted at the…
(n.)A controlling agent or influence over direction; a guide.
Dictionary.com · The American Heritage® Dictionary · See all 2 definitions »
A rudder is a device used to steer a ship, boat, submarine, hovercraft, or other conveyance that move through a fluid (generally air or water). ...
http://en.wikipedia.org/wiki/Rudder
A rudder is a mechanism for steering boats which evolved from the "steer board" (whence "starboard"), later the terminology was transferred to aeroplanes, hovercraft etc for the vertical, pivoting section of the tailplan...
http://wiki.answers.com/Q/What_is_a_rudder
At the rear of the fuselage of most aircraft one finds a vertical stabilizer and a rudder. The stabilizer is a fixed wing section whose job is to provide stability for the aircraft, to keep it flying straight.
www.grc.nasa.gov/WWW/K-12/airplane/rud.html
The movable part of a vertical airfoil which controls the yaw of an aircraft.
http://www.answerbag.com/q_view/156111
The Rudder; ... The world's oldest depiction of a ship's rudder can be seen on a pottery model of a Chinese ship dating from the first century AD. Later on, large ships with enormous rudders were used on the Chinese voyages of discoveries to Indonesia, Australia and around Africa.
www.hyperhistory.com/online_n2/connections_n2/rudder.ht... www.hyperhistory.com/online_n2/connections_n2/rudder.html
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Sea kayak rudder plans for the do-it-yourself builders with an on-line manual featuring over hundred pictures and instructions for graphite composite rudder construction ... The Rudder turned out great!! And I love working with the carbon fiber!!...I can't tell you how much help you have been in making this kayak something...
www.oneoceankayaks.com/kayakrudder.htm www.oneoceankayaks.com/kayakrudder.htm
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www.myspace.com/rudderbandnewyork www.myspace.com/rudderbandnewyork
The three primary flight controls are the ailerons, elevator and rudder.; Move mouse over the flight controls to see text below. Return To Aircraft Theory Index © The Aviation History On-Line Museum. All rights reserved. Updated November 22, 2009. Aviation Models Home Page Engine Index Flight Controls...
www.aviation-history.com/theory/flt_ctl.htm