Clipart Boating
Is a wooden boat [galleon, caravel] up a river?
Then, like a wooden boat from the 1500s up a river? My history teacher said that Africa has not been explored by Europeans until the 1800s because their boats were wooden and wooden boats can not go to a river because the current would push them back. Thats why they invented steam engines. But then, how do boats up a river to go to London and Seville, and other seaports, but not do the same thing in Africa? So, these boats can go up a river? Jim http://www.forks-web.com/% / wood http://etc.usf.edu/clipart/25200/25235/galleon_25235_lg.gif http://img.nytstore.com/IMAGES/NSAPCP2_LARGE.JPG 20boat.jpg copy and past the URL in your browser.
Your teacher is wrong. 1) Lots of experience tidal rivers, a boat may enter a river from the sea while being performed in the rising tide. 2) caravels and galleons have sails. If Wind is good, they can travel up the river since the depth and breadth of the permit. 3) Some galleons and caravels made all long oars, called sweeps and sails. They have been systematically used to navigate the rivers and bays. 4) was Gallions generally smaller vessels, called "Frigates" and "Zabra" in Spanish and barges in English, especially for coastal works such as river navigation. Barges were usually towed behind a galleon or the galleon sailed in the company if they had a separate team assigned. The reason why European explorers the 15th century did not sail well rivers of Africa is that most of the rivers of East Africa are not navigable. (The Congo navigable only by shallow draft vessels). This means that the rivers are too deep or too narrow to allow the entry of large Ships of the Sea Using caravels, galleons and later, the Portuguese explored the Amazon for a thousand miles before the river became too shallow for PS seagoing vessels being of wood has nothing to do with it. The first steamboat wood. Also in the era of exploration of one major problems is something called shipworms. Teredo were different marine invertebrates such as tubeworms, bored in the shells wooden boats, which weakens them and causes leaks. It was a terrible problem that turned to junk ships useless if they sailed too long in the tropical waters. Columbus Santa Maria has been abandoned because of damage caused by worms. One thing they learned was that they had been dead shipworms exposed for several days in freshwater. Therefore, whenever they encounter a river mouth has been sufficiently wide and deep that it would be to soak the shells in the murder of the water-worm. Regarding photos: The first is a schooner, a merchant ship Coastal popular during the 18th and 19th centuries. This type of boat is well suited to enter the river because it has a shallow draft Rather than voyages of discovery used much older types The second is a large galleon, probably beyond 500 tons. This type could enter more deeply rivers like the Thames and Hudson, but unsuitable for exploration This is a 44-gun frigate, a warship of a century GREAT 18th 2200 tons displacement. Not for all to explore the river, this type of ship was at sea only to fight against.
Origami Sailboat
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