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Inside the outer hull there is a strong hull, or pressure hull, which withstands the outside pressure and has normal atmospheric pressure inside. The pressure hull is generally constructed of thick high-strength steel with a complex stiffening structure and high strength reserve, and is divided by watertight bulkheads into several compartments ...
The blower exchanges the air within the engine compartment with fresh outside air. Because of their practical advantages and attractive cost, sterndrives have become extremely popular especially for use in pleasure boats, and there are many models of boats for which sterndrive power is the only available propulsion offered.
LED tubes. LED tube is a type of LED lamp used in fluorescent tube luminaires with G5 and G13 bases to replace traditional fluorescent tubes. [1] As compared to fluorescent tubes, the most important advantages of LED tubes are energy efficiency and long service life. LED tubes are sometimes also referred to as ‘LED fluorescent tubes’.
Belowdecks: inside or into a ship, or down to a lower deck. [12] Bilge: the underwater part of a ship between the flat of the bottom and the vertical topsides [13] Bottom: the lowest part of the ship's hull. Bow: front of a ship (opposite of "stern") [1] Centerline or centreline: an imaginary, central line drawn from the bow to the stern. [1]
A 31-inch (79 cm) section projected into the boat through the bulkhead, forming overall a relatively short tube of 12 feet (3.7 m), but of 25-inch (640 mm) diameter. With the retirement of the Mark 20S torpedo in the 1980s, the stern torpedo tubes were decommissioned and the torpedo ballast tanks were thereafter used for storing beer.
With the second type, the straight surface of the duct profile on the inside and the bent one on the outside, the inflow velocity is reduced, whereby pressure is increased, reducing cavitation. This is called a pump-jet, especially in combination with fixed blades or variable stators. NACA 4415. MARIN has done extensive research on ducted ...
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