. American engineer and railroad journal . submerged by ad-mitting sea water to a series of steel tanks connected withthe compressed air system. When the commander signals toelevate the boat from the depths, air is forced into the watertanks under high pressure, and as the water is expelled theboat rises swiftly to the surface. The air tanks have beentested to stand a pressure of 3,000 pounds to the square Inch,and are calculated to hold out for a submergence lasting tenhours, but if the supply should fail after nine or ten hoursthe tanks can be replenished by means of a tube projected tothe s
. American engineer and railroad journal . submerged by ad-mitting sea water to a series of steel tanks connected withthe compressed air system. When the commander signals toelevate the boat from the depths, air is forced into the watertanks under high pressure, and as the water is expelled theboat rises swiftly to the surface. The air tanks have beentested to stand a pressure of 3,000 pounds to the square Inch,and are calculated to hold out for a submergence lasting tenhours, but if the supply should fail after nine or ten hoursthe tanks can be replenished by means of a tube projected tothe surface as a suction pipe. The armament of the boat consists of one dynamite gun, oneautomobile torpedo tube, and one aerial torpedo tube. Thesetubes and gun are made effective by the use of compressedair, which not only enables the torpedo and gun operators tohurl torpedoes and great masses of dynamite with precisionand force, but immediately restores to the boat the weight of800 to 1,000 pounds lost when a projectile or mass of dynamite. The Holland Submarine Boat. when the boat is submerged for portraying the appearance ofthe surface. The view is secured by means ot a steel tubethrust above the water and fitted with camera are three sources of energy for propelling the boatabove and below the water, expelling water, discharging tor-pedoes and dynamite guns, and lighting the ship internally andexternally; these sources are compressed air, gasoline and elec-tricity. The important agent is compressed air, without which itwould be impossible to operate the boat under the sea. The aircompressor was built by the Ingersoll-Sergeant Drill Co. Itis of the single acting type, belt driven from a gasoline engine,when the boat is on the surface, and from an electric motorswitched to a storage battery, when the boat is compressor is capable of compressing air to 2,500 poundspressure; the diameter of the low pressure cylinder is 6 inches,the high pressure cylin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
