Difference between revisions of "Chord"
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Chord
[[/A>|/A>
]]1. A straight line intersecting a circle or other curve, or a straight
line connecting the ends of an arc.
2. (symbol c). In aeronautics, a straight line intersecting or
touching an airfoil profile at two points; specifically, that part of such a
line between two points of intersection.
This line is usually a datum line
joining the leading and trailing edges of an airfoil, joining the ends of the
mean line of an airfoil profile, from which the ordinates and angles of the
airfoil are measured. As such a datum line, it is sometimes called the
geometric chord, to distinguish it from a chord established on the
basis of any other considerations.
3. = chord
length.
In sense 3, points or stations along a chord are designated in
percentages or fractions of the chord or chord length from the leading edge,
as, a point at 25 percent, or one-quarter, chord.
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use