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How do boats with holes in their hulls for the propellar keep out water?
Wiki User
∙ 15y ago
The propeller is at the end of a shaft. The shaft passes through a fitting called a stuffing box. The stuffing box contains a material like cotton or waxed twine that wraps around the shaft. There are two or more bolts that hold the stuffing box together and by tightening or loosening the bolts you can squeeze or release the stuffing material to the shaft. Ideally you tighten the bolts to the point that water just drips in.
This allows the shaft to spin freely. It is lubricated by the water. If you tighten the box too much then you can score the shaft.
The water that drips in is usually pumped out by a bilge pump.
Wiki User
∙ 15y ago
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Why do speed boats have pointed hulls?
In order to slice through the water with ease.
Using Archimede's Principlecite an example that illustrates the apparent loss of weight?
In boats, ships, or sub's ballast tanks get too full the water separates into the hulls(the outer parts of boats) , i thinkkk. lol :D
Can you make metal float?
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It must displace as much weight in water as it weighs (roughly 600 cubic meters of water). These boats have huge hulls, so can easily displace this much without beginning to sink.
How do submarines withstand deep sea pressure?
The simple explanation of the ability of a submarine to withstand deep sea pressure lies in the mechanical strength of the pressure hull. On modern military submarines (called boats by the crews) the pressure hull is make of steel (except in the case of a few Russian boats which used titanium). This steel basically forms a cylinder and keeps the pressure of the sea water at operating depth from crushing the hull. To gain a tactical advantage, the Russian Navy built some of their boats with titanium pressure hulls. These hulls were designed to allow greater operating depths, and, therefore, increased ability to "hide" beneath the sea. But as is the case with the steel hulls, the titanium hulls used the geometry (shape) and the mechanical strength of the pressure hull and all the fittings to keep the water out at test depth.
What type of boat is most likely to have a planing hull?
A ski boat. Any type can "plane out" going fast enough though a v-hull would be the most common fro fast boats. It is a factor of the size, length, and weight of the boat and the power of the motor. A 15 foot aluminum boat can plane out with a 15hp outboard.
What type of water do deep v hulls operate best in?
shallow water
What type of water conditions do deep hulls operate best in?
shallow water
Deep v hulls operate best in what type of water condition?
shallow water
What hulls are planning hulls?
You may mean a planing hull. That is a shape of boat hull that "planes" or rides on the top of the water at high speed, rather than plowing its way through the water.
What is a multi-hulled yacht?
A multi-hulled yacht or boat is also known as a catamaran. The official Definition is: A multi-hulled boat has at least three hulls, with the outside hulls extending forward beyond the central or inside hull or hulls.The hulls are tapered with a cross-sectional configuration that increases in side front to rear, thus forming a channel or tunnel between adjacent hulls which decreases in cross-sectional size front to rear. Air entering the tunnels is compressed, thus imparting a lifting force to the hulls lifting the hulls partially out of the water to decrease the hydraulic drag on the hulls.Multi-hulled boats are often offered for charter vacations around the world. An example of a multi-hulled boat is the Aldebaran located in the Caribbean: www.bookaldebaran.com
What type of water do v hulls operate best in?
rough waters
