The Wrangell sentinel., 1923-06-28

EnS1ne cycle pore anu StTOke--
 131SS" by 19.6S5" Propeller - g diameter by 8 pitch Block coefficient of hull ------0.76 Length of vessel 210'0" Breadth 40,0" Depth 1906" Mean loaded draft 15'0" Builders of hull ll-
 Bethlehem Shipbuilding Co.
 San Francisco Designers of vessel Marine Dept,
 Standard Oil Company
 of California The hull is constructed on the transverse system with single steel deck, short forecastle and a long poop. The vessels four (double) cargo-tanks extend three feet above the deck, forming an expansion | trunk on which are concentrated the matches, cargo-discharge piping, other piping and deck fittings that might serve as Instructions in the way of handling cargo. hose or l freight so that the deck is virtually clear. A bulwark with ample freeing ports connects the poop and fore castle in order that freight may be carried on deck without danger of it 1 being washed away. The forepeak is given over to ballast, the cargo hold being just aft of it. The afterpeak is the fresh water storage space, and the engine room is just forward of it. A pump room is forward of the 1 engine room and the remainder Of the space in the boat is occupied by the cargo tankage.
 A steel deck-house on the poop deck contains quarters for the cap tain and salesman. A navigating | bridge, pilot-house and chart-room are directly above. The crews quar- ters are below decks; so are the gal | ley. mess-room, and refrigerating space An unusual feature of the Standard Services" equipment is a steel mast, unguyed, the guys being done away with to remove deck ob- structions. This mast is an H-steel column, braced with channels car ried to the edge of the expansion trunk. It carries three wooden booms for handling cargo, the hose and package freight.
 In the engine room the most strik ing features are compactness of the main power units and the absence of auxiliary engines, except for small emergency electric generator, driven by gasoline engine. In each of the Standard Oil Company's earlier | Diesel-driven tankers is consider ble installation of auxiliaries, there being two 150 b.h.p. oil engines in the "Charle Watson" and two 200 b.h.p.and one 150 b.h.p. oil engines in the "W T. Harper" in addition to the twin propelling Diesel engines
 In the Standard Service" how ever a practice developed in sta tionary plants has been adopted to marine use, and the main power plant is arranged to provide power for the auxiliary apparatus. This main installation consists of twin installations as follows:
 Two six-cylinder. four-cycle, Pa- cific- Werkspoor Diesel engines, each developing 400 brake horsepower at 265 revolutions per minute, are each direct coupled to a 250 volt, 245 kilowatt dc. generator and lon the same shaft) to a 115 volt, 30 kilo- watt exciter. The engines are of the trunk-piston type, with cylinders 335 nm. (13.18S inches) in diana ter and with 500 nm. (19 .6S5 in, ches) piston stroke. They can be ope- rated under the makers guarantee at 20 per cent overload for an hour; ] indeed pair of Pacific-Werkspoor Diesel engines already have been op- erated under virtual 20 per cent overload for year in marine ser vice. The Diesel engines were built by the Pacific Diesel Engine Co.,, Oakland, Cal.
 Each engine, generator and ex- citer, compries solid unit, the three having what virtually is one solid shaft, their bedplates being bolted together on common foot Mounted on the engine and driven from its own shaft, are circulating, bilge. fuel-oil transfer and lubrica- tion pumps, also compressor to provide high pressure injection air, which is bled to provide a supply of stating air. Owing to the nature of the installation, very little starting air is required, so theree is no auxil- iary air-compressor on the ship. Both