Control surface may refer to:
- Audio control surface
- Flight control surfaces
- Diving plane, a control surface in submarines
- Control surface (fluid dynamics), a surface – enclosing a control volume – through which a fluid flow occurs, causing a possible rate of change of the mean value for the fluid properties (as contained within that control volume)
Famous quotes containing the words control and/or surface:
“The glance is natural magic. The mysterious communication established across a house between two entire strangers, moves all the springs of wonder. The communication by the glance is in the greatest part not subject to the control of the will. It is the bodily symbol of identity with nature. We look into the eyes to know if this other form is another self, and the eyes will not lie, but make a faithful confession what inhabitant is there.”
—Ralph Waldo Emerson (1803–1882)
“White Pond and Walden are great crystals on the surface of the earth, Lakes of Light.... They are too pure to have a market value; they contain no muck. How much more beautiful than our lives, how much more transparent than our characters are they! We never learned meanness of them.”
—Henry David Thoreau (1817–1862)