Sailboat when suddenly changes direction to wind due to wind/screen interaction that can not be compensated by the wheel. This occurs when the aerodynamic force of the rig greatly exceeds the hydrodynamic force of the stomach, due to sudden increase of wind power or turbulence. In small boats and dinghies, talks can lead to death scrolls. On larger vessels, the broaching process can place a horizontal pole, placing both rig and crew in jeopardy. This can be very dangerous when racing other ships at close range.
Video Broach (sailing)
Definisi
More succinctly, a conversation is "to spin in front of the wave." Another source said it was "very dangerous" and likened it to turning the sides wide and losing control in following the oceans, thus presenting the ship's sides for the approaching large waves. In that event, the ship may "stumble" in his hull, roll over, turn over and turn the turtle.
Historically, it has been defined as:
" Broach-to To fly to the wind Usually occurs when there is a large enough ocean, and the vessel carries canvas pressure with many sets after sailing.When the ship sails with winds extending, or in the quarter, the wind acts according to the direction of the ship and the pressure on the screen is greatly reduced.If from this position the ship suddenly shows the widened sides to the wind, the sails, the poles, and the rudder will be endangered, and in extreme cases the ship may be inverted or forced down the stern mainly. generally due to the difficulty of steering the ship, by the negligence or incompetence of the helmsman, or by accident occurring at the wheel which makes him unable to arrange the ship. See LEARNED BY LEE . "
This can cause the boat to enter the Death roll, rolled over with dangerous and if uncontrolled can cause the turtle to reverse and spin
Maps Broach (sailing)
Cause, prevention and cure
Most broaching usually occurs when a boat is in a wide range with a spinnaker set and there is a very strong weather helmet. This may be caused by excessive, swollen heeling that causes the rudder to be partially lifted out of the water, or because the rod digs into a wave that causes a strong lateral force. The boat will come quickly across the wind with too much sailing. This can also happen at close range where it is usually triggered by a sudden wave. With a negligent helmsman, this could be a consequence of gybing, which can be a dangerous maneuver even when it is under control. When it happens unexpectedly and the helmet is not corrected, the boat's head can turn into a wind that causes a conversation.
Also when sailing on the wind upwind of the dead winds running inexperienced or inattentive seamen can easily misjudge the true power of the wind because the speed of the boat reduces directly from the correct wind speed and this makes the wind less clear. Additionally the sea condition also mistakenly looks lighter at this point of sailing as a developing white hat is shielded from view by the back of the wave and is less clear. When changing direction in fast wind from running to range or rhythm, sailboats that appear under control can instantly become overly investigated and in immediate danger.
One of the less obvious causes of broaching is the oscillations developed when walking against the wind. When walking dead against the wind, the screen is set with an angle of nearly 90 degrees against the wind. A high angle of attack causes turbulent bubbles to form on the lower side of the screen wind, and when there is not enough flow to keep these bubbles attached to the screen, they part. The sudden separation of the turbulent bubbles made the screen lifts almost nothing, which caused the boat to shake a little. At an angle of attack near 90 degrees, lift can produce leeches, or trailing ends of the screen. As the rocks swing from the separation of turbulent bubbles, a constructive disruption is formed, as bubbles begin to slip from the sides alternating from the screen. Once started, the oscillations build quickly, especially on ultra-modern centerboard displacement ships and sports vessels, which do not have the damping effect of a large keel. After this oscillation reaches a certain point, extreme changes at the heel angle will cause the boat to start the conversation. Spinnakers produce lift from above, not from the side, and thus they are less susceptible to this form of negotiation than other modern sailing types. Square-bound ships also generate lift from the top of their screens, which, in fact, combined with the large keel that they traditionally use, make them immune to this type of hacking.
Other causes of the negotiations are found in heavy seas and strong winds. If the cruise ship's bow is not aimed at the waves, then the waves will push the bow to the side, turning the ship's sides into the waves. Once on the waves, the waves will roll the side of the yacht to the side aloud, causing severe discomfort to the crew, and the cruise ship may start and may even reverse. Because the sailboat can not be piloted unless the screen provides forward movement, and because the heavy ocean is most often in the same direction as the wind, the sea anchor can be used in the bow in extreme weather to keep the bow on the wind and the waves. See succumbing as a storm tactic.
The key to stopping or rescuing a conversation is by handing the screen at the first opportunity. This can be done by removing the main sheet or jib by the foot or more or by releasing a boom vang (rope kick) that will shed the wind out of the top of the main screen. The main way to prevent speech is to ensure that the number of screen sets is reduced to fit the conditions of sailing.
See also
- List of nautical terms
References
Footnote
Bibliography
- Rousmaniere, John (October 1, 1999). The Annapolis Book of Seamanship (3rd ed.). New York: Simon & amp; Schuster. ISBN: 0684854201. Ã, ISBNÃ, 978-0684854205
- Chapman Book of Piloting & amp; Seamanship (various contributors), Hearst Corporation, 1999
- Herreshoff, Halsey (consultant editor); Mudie, Colin (1983). The Sailor's Handbook . Boston: Little Brown and Company. ISBN: 0316546933. < span>
- Seidman, David (March 24, 2011). Fuller Seaman (2 ed.). Camden, Me: International Marine/Ragged Mountain Press/McGraw-Hill. ISBN: 9780071749572. Ã, ISBNÃ, 978-0071749572
- Jobson, Gary (1987). Cruise Fundamentals . New York: Simon & amp; Schuster. ISBN: 0671605984.
Source of the article : Wikipedia
0 Comments