The Hull of the boat is the frame which keeps the boat and its crew floating in the water. The mast is the tall pole that sits vertically near the center of the hull, the mast is what the sails are attached to to keep them suspended and straight. The boom is a large pole attached to the bottom part of the mast which is able to rotate up, down and side to side. The sails attach to the boom and the mast then the person controlling the main sail moves the boom around to change the direction and tension in the mainsail. The rudder is atached to the rear of the boat and is what essencially steers the boat (note that the rudder alone will not steer the boat exactly where you want to go in a sailboat unlike other motorboats). The most difficult part of a sail boat for most beginners to understand is the keel or centerboard. The keel of the boat does many things, it acts as a pivital point for sharp turns and "jibbing", it helps keep the boat upright by lowering the center of gravity of the boat, it works to keep the boat moving in a line of motion close to that of the direction that the boat is facing. This is because the boat is usually being pushed heavily to the side by the wind. And the keel also works to pull the boat into the direction of the wind the same way the sails do. This is a concept that I will discuss later on. The Sails: The sails of the boat are what provide the forward thrust. There can be several sails but in every sail boat there is a main sail. That is the sail which is attached to the mast and is usually the tallest sail on the boat, it is controlled by the boom and has several attachments used for slight adjustments to get the most effeciency. There is usually a "jib", a smaller sail in the front of the boat attached to a guy wire which reaches about %75 of the height of the mast or main sail. The jib provides additional forward force but is just as usefull in providing manuverability in low speed or low wind situations or moving out of a docks area. In this site I will refer only to sailboats with a standard mainsail and jib, as in the picture to the right.
The HMS Gaspee was a schooner warship; a sailing ship with two or more masts, typically with the foremast smaller than the mainmast, and having
The carrack, or nao, was a large, multi-decked ship that used a combination of square and lateen sails to ensure a balance of power and maneuverability. The carrack became the premiere ship of early exploration and trade as it was able to carry up to 1,000 tons(Johnston) and was capable of withstanding the lengthiest voyages. The premiere ships of the voyages of Columbus, De Gama, and Magellan were all carracks.
cannons on one side of the ship to free them from the mud holding the ship.
the ship such as: mathematics, navigation, the operations of a ship, and how to read
The paddle wheels were mounted either on the side or back of the boat. After the Civil War, the stern (back of the boat) paddle wheel was most popular. Although the paddle wheel is very large it draws just a few feet of water. The wheel spins about 18 times a minute with only four planks in the water for best speed. A steamboat travels about 15 miles an hour and 16 to 17 miles an hour on a swift river.
In modern time, traveling by boat is very much easy, and most people prefer it now for vacations and long trips through the sea.What most of us would recognize and identify this as a cruz. Though we have evolved, traveling by boat wasn't always so pleasant for many in the past. In the early 10th century when the European’s started traveling to the America, it was a struggle to travel by boat. It was hard to survive the voyage over seas for a several reasons according to Gottlieb Mittelberger.
TheVikings have been sailing for thousands of years (Steel 1). The Vikings traveled for 2 years this was called a Vikings trial (Steel 1). They would go out in search for land and new wonders in life. They would build their own boats out of wood and hides of animals. They were known as the best sailors of their time.
Navy started building a squadron of gunboats and two frigates in the remote town of Erie, on the shores of Lake Erie. It was an odd choice, given that there were no access roads, no foundries, rope factories or shipwrights nearby. But the area’s dense forests provided the critical resource – tall straight timbers for planking and masts. In fact, the timber resources in North America were one of the several reasons that Britain wished to hold on to the Canadian provinces. Timber on the British Isles was all but gone – any new ships for the Royal Navy would be fashioned out of New World wood. Not surprisingly, British shipwrights were also busy building ships on the Great Lakes, in Amherstburg and Kingston,
Personal Watercrafts or "jet skis" are basically Personal Watercraft (PWC) are basically small inboard boats able to travel at high speeds due to large amounts of power and very light weight. Alomst all PWC's are under 600 lbs and most of todays PWC's have at least 90 hp.Not only are PWC's some of the fastest water vehicles they are also some of the most maneuverable water vehicles. This is because PWC's propultion is based on a jet that also is it's turning mechanism. When the driver turns the handlebars the jet (via cables) turns in the direction of the handlebars so the stern is pushed in the opposite direction. This allows the driver to turn at a much tighter angle than traditional boats with keels and rudders.The main drawback to this maneuverability is the fact that if there is no thrust coming from the engine the ability to turn is effictively zero meaning that anytime the driver presses the kill switch (a large red button) they lose all ability to steer. This is extremely dangerous whenever an inexperienced person may drive the PWC back to dock or into shore. PWC's have no brakes and have no ablilty to stop other than turning around. They have an extremely efficient ability to hydroplane (when most of the PWC is above water) and it takes most PWC's a few hundred feet to come to a stop after being at full throttle. This is because 600 lbs + a rider is traveling at a very high speed with only minimal friction to slow them down (since PWC's are made to travel with very little friction).
The trials and tribulations of flight have had their ups and downs over the course of history. From the many who failed to the few that conquered; the thought of flight has always astonished us all. The Wright brothers were the first to sustain flight and therefore are credited with the invention of the airplane. John Allen who wrote Aerodynamics: The Science of Air in Motion says, “The Wright Brothers were the supreme example of their time of men gifted with practical skill, theoretical knowledge and insight” (6). As we all know, the airplane has had thousands of designs since then, but for the most part the physics of flight has remained the same. As you can see, the failures that occurred while trying to fly only prove that flight is truly remarkable.
"People either love it, or they hate it," Fred proclaimed again, for the umpteenth time. His reddish face almost glowed against the gray sky. The combination of giddy grin, round cheeks, and fine, yellow, tousled hair yielded a face far too boyish for a man in his mid-fifties. But the always-present twinkle in Fred's eye was ever so slightly diminished today, and I knew why: he feared that his intuition might be mistaken and that I might not, after all, take to today's activity. His concern was compounded by weather; it was far from ideal for this, my first sail. Why was it so important to him that I like sailing anyway?
To paddle, you first lie on your surfboard – to do this body weight needs to be positioned along the centre of the board. Your feet need to be raised slightly off the end of the board. Your body needs to be far enough back to keep the nose of the board about a couple of inches out of the water. If you are too far forward on the board you will notice that the nose of the board keeps dipping underwater making it very difficult to paddle. It will take time to find the most comfortable position.
If a person enjoys extreme water sports, then kiteboarding is definitely something you will love to experience. Kiteboarding is a mixture of some of the most popular water sports today. Kiteboarding includes extremely fast speeds, awesome tricks and carving turns from other board sports, and the extreme jumps that provide big air that are not like any other of the water sports today (Wies). Kiteboarding includes many steps in the learning process and many types of equipment that are essential to help avoid the risks of unwanted accidents.
waves. The waves at the front of the boat are compressed and are shorter than the longer, spread out waves at the back of the boat.
Boat Building- Caribs’ canoes might have been up to 6 metres long. It was made out of tree trunks. The trunk was charred then hollowed with stone axes and left to season, after which it was buried in moist sand. Bars were placed across the opening to the force out the sides and it was left in place until wood had dried and hardened. Then triangular boards were wedged at the bow and stern so that the water could not enter the boat, and the sides were raised by fastening sticks bound with fibres and coated with gum to the upper edges.