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The origami crane diagram, using the Yoshizawa–Randlett system. The Yoshizawa–Randlett system is a diagramming system used to describe the folds of origami models. Many origami books begin with a description of basic origami techniques which are used to construct the models.
In that period, sail plans might start from smallest to largest boat or ship in a hierarchy of sailing rigs: [10] [2] Yachts. Catboat with a single sail; Sloop with mainsail and jib; Yawl with a small mast behind the steering post; Ketch with a mizzenmast ahead of the steering post; Working boats and coastal freighters. Cutter with a single ...
A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
One of that war's outstanding warplanes, the North American P-51 Mustang, was designed using mathematical charts and tables rather than lofting tables. [5] Lofting is the transfer of a Lines Plan to a Full-Sized Plan. This helps to assure that the boat will be accurate in its layout and pleasing in appearance.
The traditional Olympic triangle course consists of a lap (starting with a beat or work to windward from the starting line to the top, weather or windward mark, a first reaching leg to the wing mark (also known as the gybe mark), a second reaching leg from the wing mark to the bottom or leeward mark), a hot dog (a beat to the top mark with a square run back to the bottom mark), another lap and ...
Before the advent of nautical charts in the 14th century, navigation at sea relied on the accumulated knowledge of navigators and pilots.Plotting a course at sea required knowing the direction and distance between point A and point B. Knowledge of where places lay relative to each other was acquired by mariners during their long experience at sea.
Lateral force also induces heeling in a sailboat, which is resisted by the shape and configuration of the hull (or hulls, in the case of catamarans) and the weight of ballast, and can be further resisted by the weight of the crew. As the boat points off the wind, lateral force and the forces required to resist it become reduced. [19]
Sailboats employ standing rigging to support the rig, running rigging to raise and adjust sails, cleats to secure lines, winches to work the sheets, and more than one anchor to secure the boat in harbor. A cruising yacht's deck usually has safety line to protect the crew from falling overboard and a bow pulpit to facilitate handling the jib and ...