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121 Winton engines. Each engine has six cylinders of 14 inches diameter and a stroke of 18 inches. The normal rated brake horsepower of each engine is 850 at 225 revolutions per minute. This engine is fitted with an attached compressor of three stage type with a capacity of 157 cubic feet per min- ute at 225 revolutions per minute. There is an attached circulating water pump of 166 gallons per minute ca- pacity at 66.5 revolutions. The at- tached lubricating oil pump of two cylinders has a_ displacement per cylinder of 41% gallons per minute. There is also a 6 cylinder fuel oil injection pump and an attached fuel oil service pump. For starting and maneuvering there are four air flasks of 21.1 cubic feet each also four injection air flasks of 2.65 cubic feet capacity each. The propellor shafts are of 6%- inch diameter under the liners. Solid manganese bronze three bladed pro- pellors are fitted. They are 6 feet 6 inches in diameter and have a varying pitch of 49.4 inches at 9 inches radius and 68.2 inches at 3 feet 3 inches radius (the effective pitch for esti- mating slip is 5 feet). The developed area is 14 square feet. Auxiliary Machinery There are two Winton diesel en- gine driven generating sets. The en- gines are full diesel single acting, four cycle, air injection, trunk piston, nonreversible, marine type of the maker’s model 4-116. Each engine is direct connected by means of a coup- ling to a 75-kilowatt 230 volt, direct current Westinghouse generator. The engines have four cylinders, 10-inch diameter and 14-inch stroke. Each engine develops at normal rating 120 brake horsepower at 300 revolu- tions per minute. There are the usual attached compressor circulating water pump lubricating oil pump etc. An emergency diesel engine driven compressor and generator unit is in- stalled consisting of one Hill diesel, single acting, four cycle, solid injec- tion, three cylinder, marine type, de- veloping at normal rating 18 brake horsepower at 550 revolutions per minute. This engine drives, through clutches, a 12-kilowatt 230-115 volt direct current, Westinghouse gener- ator and a Winton three stage air compressor. Pumps for general service of rotary type, electric motor driven and fur- nished by the Northern Pump Co. are fitted as follows: One as a reserve for circulating water, of 250 gallons per minute against 100 pounds dis- charge pressure; one for fire, sanitary, and general service of 250 gallons ONE OF THE TWO WINTON DIESEL ENGINES IN THE OIL BARGE TYDOL SHOWING FLYWHEEL AND KINGSBURY THRUST BEARING—350 HORSEPOWER AT 225 REVOLUTIONS PER MINUTE capacity per minute against 100 pounds discharge pressure; one bilge pump of 75 gallons per minute ca- pacity against 100 pounds discharge pressure; one fuel oil transfer pump of 75 gallons per minute capacity and one lubricating oil pump of 125 gal- lons per minute capacity, both ratings against 100 pounds discharge pressure. For refrigeration there is installed one electric motor driven Brunswick- Kroeschell %-ton direct expansion amonia type refrigerator. There is an independent electric driven rotary condenser and drinking water circu- lating pump. Purification of lubricat- ing oil is done by means of an electric driven Sharples No. 4 centrifuge. A complete Lux C02 fire extinguishing system as made by Walter Kidde & Co. has been installed. Mechanical ventilation is furnished by an electric driven blower, of 1500 cubic feet per minute capacity, lo- cated in the machinery space. This blower takes air from the outside through the ventilators and distributes air to the machinery spaces and quarters above deck by means of air ducts. There is an 16-inch electric driven exhaust fan in the after ma- chinery space ventilator. In the main cargo oil pump room there are three rotary pumps of North- ern type each capable of handling at normal rating 525 gallons per min- ute when operating against a dis- charge pressure of 100 pounds and at a pump rotor speed of 300 revolutions per minute. Each pump is driven from the machinery space by a West- inghouse 50 shaft horsepower 900- 1200 revolutions per minute 220-volt MARINE REVIEW—July, 1927 direct current motor by means of shafting extending through the bulk- head which separates the machinery space and pump room. In the forward lubricating oil pump room there are two _ rotary pumps of Northern type each able to handle at normal rating 150 gallons per minute against a discharge pres- sure of 100 pounds and at a pump ro- tary speed of 850 revolutions per minute. Each pump is driven by a di- rect- connected Westinghouse motor of 15 shaft horsepower, 650-850 revo- lutions per minute 220 volts. The mo- tors are of direct current, entirely enclosed, and vapor proof. The motor casings are vented to and from the deck. All deck auxiliary machinery is electric driven. The steering gear of Allan Cunningham drum type is of 10 shaft horsepower straight electric geared and is controlled by electric telemotor from the midship wheel house, the harbor wheel house, and mechanically in an emergency at the unit. The geared drum actuates the twin balanced rudder through chain leads and quadrants. There are two windlasses, one forward and one aft, the latter being for handling the stern anchor. Both windlasses are of Allan Cunningham type of 10 shaft horse- power, triple spur geared, with two wildeats and gypsy heads for the for- ward windlass and one wildeat and gypsy head for the aft windlass. There are two bower anchors of stockless type, each weighing 1500 pounds and one stern mushroom anchor of 500 pounds weight. The anchor chain at bow and stern is 1%-inch in diameter. 33