Search results
Results from the WOW.Com Content Network
A rudder operates by redirecting the fluid past the hull or fuselage, thus imparting a turning or yawing motion to the craft. In basic form, a rudder is a flat plane or sheet of material attached with hinges to the craft's stern, tail, or afterend. Often rudders are shaped to minimize hydrodynamic or aerodynamic drag.
In many cases, these techniques were very labor-intensive or inefficient in their use of raw materials. Regardless of differences in ship construction techniques, the vessels of the ancient world, particularly those that plied the waters of the Mediterranean Sea and the islands of Southeast Asia were seaworthy craft, capable of allowing people ...
In ancient history, various vessels were used for coastal fishing and travel. [3] [obsolete source] A mesolithic boatyard has been found from the Isle of Wight in Britain [4] The first true ocean-going boats were invented by the Austronesian peoples, using technologies like multihulls, outriggers, crab claw sails, and tanja sails.
Rudder: a hinged vertical plate at the stern for steering a craft. There may be more than one rudder. Sampson post: a strong vertical post which supports a ship's windlass and the heel of its bowsprit, also used to making off mooring lines. Scuppers: gaps in the bulwarks permitting water to drain off the deck.
Early steamships were fueled by wood, later ones by coal or fuel oil. Early ships used stern or side paddle wheels, which gave way to screw propellers. The first commercial success accrued to Robert Fulton's North River Steamboat (often called Clermont) in US in 1807, followed in Europe by the 45-foot (14 m) Comet of 1812. Steam propulsion ...
Drawing the retorts at the Great Gas Establishment Brick Lane, from The Monthly Magazine (1821). The history of gaseous fuel, important for lighting, heating, and cooking purposes throughout most of the 19th century and the first half of the 20th century, began with the development of analytical and pneumatic chemistry in the 18th century.
The inboard boat motor firm of Caille Motor Company of Detroit were instrumental in making the cylinder and engines. The most successful early outboard motor, [ 16 ] was created by Norwegian-American inventor Ole Evinrude in 1909. [ 18 ]
They were made by winding molten glass around a metal bar and were highly prized as a trading commodity, especially blue beads, which were believed to have magical powers. The Egyptians made small jars and bottles using the core-formed method. Glass threads were wound around a bag of sand tied to a rod.