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Dunn , to ferret out the board-level source of media leaks using methods Perkins considered unethical and illegal. HP gave no cause in the SEC-required 8-K filing, according to Perkins refused to amend the filing to indicate his reasons for resigning. In response, Perkins disclosed his reasons publicly, triggering an SEC investigation and significant media interest into HP's leak-finding activities. Perkins's residential phone records were obtained through a method known as pretexting.

Industrial design

HP confirmed that the investigative firm they hired used pretexting to obtain information on the call records of the directors. HP's investigation found. At the May 18, board meeting, Dr. Keyworth admitted to leaking information but refused to resign after the board passed a resolution calling for his resignation. HP's board decided on August to not renominate Dr. Keyworth for another term as director; the Securities and Exchange Commission and the State of California have begun inquiries into the methods used by HP to investigate its directors.

Dinh represented Perkins in the HP board affair. In July, , Dinh and fellow News Corp. One business commentator, noting Perkins' prior experience with phone-hacking in the HP scandal, speculated that Perkins "may be best hope" as News Corp. After she died in , he married romance novelist Danielle Steel in March , they separated in August and were amicably divorced. Perkins was the subject of a 60 Minutes special titled "Captain of Capitalism ", which focused on his memoir and featured a tour of his yacht.

He was featured in the documentary film Something Ventured , which premiered in In January , the Wall Street Journal published a letter from Perkins that compared the "progressive war on the American one percent" of wealthiest Americans and the Occupy movement's " demonization of the rich" to the Kristallnacht and anti-semitism in Nazi Germany : Writing from the epicenter of progressive thought, San Francisco , I would call attention to the parallels of fascist Nazi Germany to its war on the "one percent", namely its Jews, to the progressive war on the American one percent, namely the "rich.

Perkins subsequently apologized for making the comparisons with Nazi Germany, but otherwise stood by his letter, saying, "In the Nazi era it was racial demonization, now it's class demonization. Both Perkins, the moderator and the audience were laughing. In an interview afterwards, Perkins said "I intended to be outrageous, it was. Square rig Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular , or square, to the keel of the vessel and to the masts.

These spars are called yards and their tips, beyond the last stay, are called the yardarms. A ship so rigged is called a square-rigger ; the square rig is aerodynamically the most efficient running rig, stayed popular on ocean-going sailing ships until the end of the Age of Sail. The last commercial sailing ships, were square-rigged four-masted barques.

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Square-rigged masts may have triangular staysails that are deployed fore-and-aft between masts; the term "square-rigged" can describe individual, four-cornered sails suspended from the horizontal yards, carried on either a square-rigged or a fore-and-aft rigged vessel, such as one with a bermuda rigged or gaff rigged mainsail.

It is slang and refers to anyone wearing the famous blue square collar on the shoulders and bell-bottomed trousers. The name reflects the fact that it was these men who managed the square-rigged sails. The peaked cap uniform worn by Senior Ratings and Officers is known colloquially as'fore-and-aft rig'. A mast is considered square-rigged if its lowest sail or course is square-rigged, but if this is the case it will have a complete set of square-rigged sails. If the course is fore-and-aft, square topsails can still be carried in front of the mast. In their heyday, square-rigged vessels ranged in size from small boats to full rigged ships, but this rig fell from favour to fore-and-aft gaff rigs and bermuda rigs after the development of steam power and new materials.

Ocean-going sailing ships stayed square-rigged.

Square rigs allowed the fitting of many small sails to create a large total sail area to drive large ships. Fore-and-aft could be sailed with fewer crew and were efficient working to windward or reaching, but creating a large total sail area required large sails, which could cause the sails and cordage to break more under the wind.

Some clipper ships that had square rigs and for whom speed was critical could be much faster; the late windjammers were as fast as the clippers. Not only could a smaller sail be managed by a smaller crew but these smaller sails constrained the impact of weapons on them.

A hole from a cannonball affected only one sail's area, whilst a hole in a large sail would tear the whole larger area and reduce more of the vessel's motive power. With the development of more advanced fittings and cordage geared winches, high loads on an individual line became less of an issue, the focus moved to minimising the number of lines and so the size of the crew needed to handle them; this reduced running costs and enlarged the space available in the ship for profitable cargoes. New materials changed sail designs on hybrid vessels carrying some square-rigged sails; the low aspect ratio of square-rigged sails produces much drag for the lift produced, so they have poor performance to windward compared to modern yachts, they cannot sail as close to the wind.

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The Bermuda rig is the undisputed champion of windward performance in soft sails, due to its low drag and high lift-to-drag ratio. One advantage of square rigs is that they are more efficient when running, where the high lift to drag is irrelevant and the total drag is the most important issue. Square-rigged sails are less prone to broaching when running than Bermuda rigs. Ocean-going vessels take advantage of prevailing winds such as the trade winds and the westerlies and are thus running. On a square-rigged mast, the sails had names; the lowest square sail was the course, the next sail up the mast was called the topsail , the next the topgallant sail.

Many vessels shipped a fourth sail called the royal, above the other three, some more on trades with light winds. Sometimes a vessel might put out studding sails which would be fixed outboard of these sails along the yards. Beginning in the mid-nineteenth century, the topsails and topgallants were each split into upper and lower sails.

Aero-hydrodynamics and the performance of sailing yachts

Sails are referred to by their mast and name, e. Where no mast is specified, the main mast is implied. The oldest archaeological evidence of use of a square-rig on a vessel is an image on a clay disk from Mesopotamia from BC. The early, simple square-rigged ships, having only the one square sail, were more limited in their ability to sail into the wind than multi-sail square-riggers.

That, along with the vulnerability of a single large sail after guns began to be used in naval warfare, led to the single sail square rig being abandoned beginning in the medieval period, in favor of multi-sail, multi-mast square rigs. On multi-sail, multi-mast v.

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Since its inception in , Oceanco has built 29 custom superyachts up to m in length. In the company acquired more land adjacent to the present yard, in they set about demolishing the old buildings and slips, to make way for a new state-of-the-art covered dry-dock , which now allows them to construct yachts up to metres; the company operates in its extended production facility located in Alblasserdam 20 km from Rotterdam , the Netherlands.

The yard has unrestricted direct access via the inland waterway system to the North Sea. Oceanco maintains a sales, design and communications office in Monaco. Oceanco is owned by an Omani billionaire. Oceanco came into existence in , when a group of South African private investors under the guidance of CEO, Richard Hein , began yacht-building operations, with the hulls and superstructures built in Durban, South Africa. The yachts were transported to various facilities in the Netherlands where the finishing work took place.

In , the Barwani has interests in oil, gas and minerals in Europe , the Middle East and Asia Pacific through MB Holding as well as investments in various other diversified assets. Marcel Onkenhout, with the company for 20 years, is the CEO; the company has since delivered 29 yachts. More the Sam Sorgiovanni designed Princess Olga The largest yacht built by Oceanco is Jubilee. In the yard launched Project Bravo , a m superyacht.

Several other Oceanco yachts are under construction. Oceanco — official site. From Wikipedia, the free encyclopedia.

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The Aero- and Hydromechanics of Keel Yachts. Categories : Sailing rigs and rigging German inventions. Related Images. YouTube Videos.

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Main-mast of a square-rigged brig , with all square sails set except the course. The Golden Hinde , a square-rigger with several of its lines unshipped, in dry dock in London. Developed from a type of schooner known as Baltimore clippers, clipper ships had three masts and a square rig. Sovereign of the Seas set the record for world's fastest sailing ship in Hornet — an American clipper ship of the s. American clipper ship, painted in typical style by Chinese artist Lai Fong.

Clipper barque Spirit of the Age by T. Black Pearl is a sailing yacht launched in , which is It has three DynaRig masts supporting a sail area of 2, square meters. The yacht was known during its build process originally as Oceanco Y and thereafter as "Project Solar". She is one of the world's most complex and largest sailing yachts at 88 m, similar in size to the Athena and Eos. Founded in by Fabio Perini, who pioneered automation and furling systems in large sailing yachts, the yard builds both sailing and motor yachts.

Running rigging on a sailing yacht: 1. Main sheet 2. It was the most popular sailboat in this size range ever built in the US, with examples completed.