watercraft
Quick Summary
Watercraft refers to any buoyant structure designed for travel on water. This includes a wide variety of vessels, from small boats propelled by paddles, oars, sails, or motors, to larger ships. The earliest forms of watercraft, dating back to 4000 BCE, were simple rafts and dugout canoes, evolving over millennia with advancements in materials and construction techniques like planking.
Historically, water transport has been crucial for trade and movement, especially along rivers like the Nile. Designs diversified based on function, with narrow, fast vessels for warfare and rounder, larger-capacity ships for cargo. Modern techniques continue to enhance water transport's efficiency and economic viability for moving bulk commodities.1234
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ship construction…the great days of sail, vessels were designed and built on the basis of practical experience; ship construction was predominantly a skill. With the rapid growth and development of the physical sciences, beginning in the early 19th century, it was inevitable that hydrokinetics (the study of fluids in motion), hydrostatics…
Read More…the great days of sail, vessels were designed and built on the basis of practical experience; ship construction was predominantly a skill. With the rapid growth and development of the physical sciences, beginning in the early 19th century, it was inevitable that hydrokinetics (the study of fluids in motion), hydrostatics…
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diesel engineEarly work…the primary power plant for submarines during World War I. It was not only economical in the use of fuel but also proved reliable under wartime conditions. Diesel fuel, less volatile than gasoline, was more safely stored and handled.
Read More…the primary power plant for submarines during World War I. It was not only economical in the use of fuel but also proved reliable under wartime conditions. Diesel fuel, less volatile than gasoline, was more safely stored and handled.
Read More- diesel engineSubsequent developments and applications
…diesel engines were purchased for marine propulsion. The diesels, however, normally rotated faster than was desirable for the propellers of large ships because the high speeds of the huge propellers tended to create hollowed-out areas within the water around the propeller (cavitation), with resultant loss of thrust. The problem did…
Read More…diesel engines were purchased for marine propulsion. The diesels, however, normally rotated faster than was desirable for the propellers of large ships because the high speeds of the huge propellers tended to create hollowed-out areas within the water around the propeller (cavitation), with resultant loss of thrust. The problem did…
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turbineDevelopment of modern steam turbines…also gained preeminence in large-scale marine applications, first with vessels burning fossil fuels and then with those using nuclear power. Steam generator pressures increased from about 1,000 kilopascals gauge in 1895 to 1,380 kilopascals gauge by 1919 and then to 9,300 kilopascals gauge by 1940. Steam temperatures climbed from about…
Read More…also gained preeminence in large-scale marine applications, first with vessels burning fossil fuels and then with those using nuclear power. Steam generator pressures increased from about 1,000 kilopascals gauge in 1895 to 1,380 kilopascals gauge by 1919 and then to 9,300 kilopascals gauge by 1940. Steam temperatures climbed from about…
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