irregular curves
irregular curves are commonly called French curves. These curves have no constant radii. A radius curve is composed of a radius and tangent. The radius curve is composed of a radius and tangent. The radius on these curves is constant and range from 3 ft to 200 ft. These curves are commonly used in highway drafting. In addition to these two kind of curve, there are available ships curves. The curve in a set of ships curves become progressively larger and, like French curves, have no constant radii. They are used for layout and development of ships' hulls. Flexible curves are also available that allow you to a desired curve.