Polar Diagram (sailing) on:
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A polar diagram, or polar plot, is a
ORC Sailboat Data
a large database of polar diagrams maintained by the
A polar diagram, or polar plot, is a graph
Graph may refer to:
Mathematics
*Graph (discrete mathematics), a structure made of vertices and edges
**Graph theory, the study of such graphs and their properties
*Graph (topology), a topological space resembling a graph in the sense of discre ...
that shows a sailboat
A sailboat or sailing boat is a boat propelled partly or entirely by sails and is smaller than a sailing ship. Distinctions in what constitutes a sailing boat and ship vary by region and maritime culture.
Types
Although sailboat terminology ...
's potential speed over a range of wind speeds and relative wind angles. It normally consists of the right side of a line chart
A line chart or line graph or curve chart is a type of chart which displays information as a series of data points called 'markers' connected by straight line segments. It is a basic type of chart common in many fields. It is similar to a s ...
with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally drawn on the chart representing wind speed. To identify how fast a yacht could potentially go you select a particular wind speed curve and particular wind angle. Refer to the graph to the right for an example.
Polar diagrams are normally specific to a particular sailboat design and are created by the yacht designer. Polar diagrams can also be created using a velocity prediction program
A velocity prediction program (VPP) is a computer program which solves for the performance of a sailing yacht in various wind conditions by balancing hull and sail forces. VPPs are used by yacht designers, boat builders, model testers, sailors ...
or by a range of computer programs including iPolar and iRegatta.
See also
*Forces on sails
Forces on sails result from movement of air that interacts with sails and gives them motive power for sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and sail-powered land vehicles. Similar principles in a rotating ...
External links
ORC Sailboat Data
a large database of polar diagrams maintained by the
Offshore Racing Congress
The Offshore Racing Congress (ORC) is an international body for the sport of competitive sailing and is responsible for the establishment and maintenance of rating and classification standards used to define offshore, that is marine as opposed to ...
References
Naval architecture Sailing {{Sailing-stub