Propulsion and Pumping
The vessel is propelled by a single four-bladed screw, and the engines for working the propeller were constructed at Mystic, CT, by Mallory and Co. When at her usual draft the vessel will steam 9 miles per hour (14 km/h); but when immersed to the gunwale, ready for going into action, her speed is reduced to from 3½ to 4 miles per hour (6 km/h); her movements are stated to be quite noiseless. She is provided with stowage for 160 tons of coal, equal to eight days' consumption. The pumps used for filling and emptying the compartments, by which the degree of immersion of the vessel is regulated, are a pair of Andrews's centrifugal pumps of the size known as "No. 6." These pumps are situated a short distance ahead of the pilothouse, as shown in Figs. 2 and 3 and they are each driven by a small oscillating engine, the crankshaft of each engine being coupled direct to the shaft of the pump to which it belongs. One of these pumps — that on the port side — has its suction pipes so arranged that, in addition to drawing from the water compartments or the sea, it can draw from the reservoir or tank in the fore part of the vessel, in which the torpedoes are placed.
Read more about this topic: USS Spuyten Duyvil (1864)
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