Admiral W L Capps (AP 121) - Naval Cruise Book

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- DIVISION The maintenance of the ship's main propulsion plant was the responsibility of 5-M Division. A twin screw, turbo-electric drive, propulsion plant furnished the 20,000 H.P. necessary to push the ship along at 25.5 knots. The source of all power aboard the ship was four, 600 p.s.i., 8400 F. boilers installed in pairs, two in each of the machinery spaces. The superheated steam drove the 6890 K.W'. main turbo-generators at 3600 R.P.M. producing a 60 cycle, 3 phase current, 3400 volts. The electrical power, thus gener- ated, operated the two main motors. These motors were 60 pole, Y connected, synchronous motors. Each turbo-generator normally supplied only one motor. Since the starting torque of a synchronous motor is exceeding- ly small, the two main motors were made, so that during the starting period, they acted as induction motors and consequently l Opening throttle valve on main turbine Checlqing jacking gear on main motor produced a large starting torque. When the motor 1S up to speed, 3 it then acts as a synchronous motor. A pressure-closed feed system was used on the ADMIRAL CAPPS. To complete the cycle of this system the steam leaving the main turbine was condensed in the main condenser and then pumped to the low pressure feed heater by the main condensate pumps. Here the condensate was heated and then discharged to the deaerating tank. In the deaerating tank the condensate was further heated and the oxygen was removed from the water. From the deaerating tank the condensate, now termed feed water, was pumped back into the boilers by the main feed pump, thus completing the steam cycle. ,- IQ cows f+ - A 0,4 l ..f I 1 1 L4 XVHYS SOE? iiflff Elppiifafli. d by the 80.000 from this so' ' f ' In ad condenser generators 4 '41 A+.f3-- Ll - 53:11 ' 3 . . .4 . .. xi lower machine lube oil p 11,-viva. im' s ..4-. , , sanitary of r,

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5-E DIV 'FHWA .f,?.,-1: .st f gs Th Th yt kg gf! :ere ckxitrwtall? dd'm' hits, md as ru :bf ' gqgntuhkw' The Interior Communications Room engine rooms and motor rooms. Practically all of the engine room auxiliaries were electrically driven, not to mention the many electrical alarms and control devices, all of which had to be kept operating continually. ISION The interior communications section had charge of a group of equipment including such things as engine order telegraphs, automatic whistle operation, general announcing systems, rudder angle indicators, and both automatic dial and sound powered telephone circuits. Such communications as the above become rather extensive on a ship the size of the ADMIRAL CAPPS and maintenance is consequently a difficult job. However, com- munications, which is the heart and soul of a large modern Naval vessel, must be kept in top-notch condition at all times. One of the most important duties of 5-E Division, and one which does not fall under either of the three above mentioned sections, has been the maintenance of the master gyro compass, gyro repeaters, gyro pilot or Iron Miken, and the automatic course recorder. Although this division was necessarily decentralized, some of its members working from the power shop, others from the light shop, and still others from the I.C. room or telephone central, its members demonstrated their espirit de corpsii last Christmas time. When Christmas decorations could not be bought, the division volunteered to make them. Strings of Xmas tree lights, a Haming red cross, ten feet high, for the main mast, and a white star of Bethlehem for the foremast were ingeniously constructed from spare parts and salvage. Their work brought a sincere well done from the Captain, who remarked that it made the CAPPS the shining light of a well decorated Navy Yard.

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as Q maids? fy nm-tcm rs up to speed. rd on the ADMIRAI- mm the steam Icavifl8 in md thtn I N513-.R fiflknsatc 3560 fd to ,Q sbt tifllllkflutf was med irw' if 'ad' W' mud hed H -M DIVISION Since only a few repairs can be made to the main plant while underway, members of 5-M Division stood a throttle watchn at Lathe work in the machine shop In spite of the closed cycle in the feed system, there was al- ways some steam and water loss through leakage, noncondensing apparatus, and nonreturn drain systems. This loss was made up by the operation of two distiller condensers supplying a total of 80.000 gallons per day. The entire ship's fresh water supply came from this source. In addition to the main propulsion plant and the distiller condensers, 5-M Division was responsible for the auxiliary turbo- generators and the various auxiliary machinery located on the lower machinery level, such as, feed pumps, circulating pumps, lube oil pumps, bilge pumps, fresh water pumps, and fire and sanitary pumps. the main control panel, an oiler watchn on the lower machinery level, and an evaporator watchn on the Distiller condensers. These men on watch kept constant check on the gages and meters that indicated whether or not the plant was functioning properly. Cause of any abnormal operation must be determined immediately and the fault corrected so as to keep the plant opera- ting. Many times this called for work throughout the night since a mechanical apparatus is not respectful of an 8 hour work day. It is due to the willingness of the men in 5-M Division to thus subordinate themselves to the needs of the machinery that the main plant functioned at its rated horsepower day and night, month after month, through smooth or rough weather. Answering bells on the main control board