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a SS 8886860606000—~—O0>®™—@>$@—=$—$—$—$0naESN oom TABLE I Additional Facts About Diesel River Towboats Benwood and Class Description of Hull The hull is of all steel with straight sides, flat bottom, scow bow and is built on the transverse system of framing. There are four water tight transverse bulk- heads and two transverse oil tight bulk- heads, dividing the hull into six compart- ments and with two longitudinal oiltight bulkheads into three oiltight compartments for fuel. : The bottom plating is of 5/16-inch thick- ness, the side plating is %-inch and the deck plating %4-inch. The turn of the bilge is formed with a 12-inch radius. Longitudinal seams are lapped and single riveted; transverse seams in the bottom are lapped and double riveted, transverse seams in deck at center of the boat are treble riveted. All shell rivets are of %- inch diameter. Deck Fittings Four double and four single roller chocks and two button roller chocks on bow and chain plates are provided. Towing knees as shown in the accompany- ing illustration are built of 15.3-pound plates stiffened by 34 x 3 x 4-inch angles, and 12-inch x 25-pound channels fitted with 8 x 12-inch oak head piece and %- inch face plate. Deck House The deck house sides are of 5-pound plates stiffened with 144, x 2 x 8-inch angle. The roof is of No. 9 gage steel plating and supported by 4-inch x 6.25-pound chan- nel carlins, increased to 6-inch x 8.2-pound channels in way of the concentrated load- ing. The beams and side angles are spaced about 25 inches between centers. : In quarters the ceiling and the sheathing on the outside bulkheads are of 14-inch vehisote board framed with white pine nail- ing strips. The inside partitions are of 5/16-inch vehisote board. Doors are of steel for the engine room and of wood for quarters. The swash bulkhead is of No. 9 gage steel stiffened with angles. Pilot House The pilot house is constructed of 5-pound steel sheets stiffened with angles. It is 13 feet 514 inches wide, 138 feet long and about 12 feet high. The floor is raised about 4 feet above the roof of the deck house. A wooden door at the aft end leads out to the cabin deck. There is a leather cushion seat at the after end and a small table. A stove is also provided. Hog Rods The vessel is fitted with two fore and aft hog rods of 114 x 4-inch eye bars supported by 7-inch extra heavy pipe stanchions. Turnbuckles are provided for adjustment. 90 cubic feet. The air pressure carried is approximately 200 pounds. The air supply is stored in three air tanks with a total capacity of 234 cubic feet. With the extra large AT LEFT—STERNWHEEL DRIVE GEARING Capstans At the forward end of the vessel there are two single barrel heavy duty Dravo capstans, operated by 25-horsepower, 110- volt, direct current General Electric mo- tors. The motors are connected to the capstans through spur and bevel gears. Pro- vision is also made for hand operation. Two lighter duty capstans are installed amidship, operated by 15-horsepower, 110- volt, direct current General Electric mo- tors by means of spur and bevel gears. Solenoid brakes are furnished for all cap- stans and in addition the foreward cap- stans are provided with pawls. Steering Engine, Pumps, Compressor The steering engine is of Western river ram type of 7-inch diameter and 7 feet 33-inch stroke, and is operated by com- pressed air. There is a sanitary pump 21%4 x 2% x 3 inches operated by air and provided with a governor to maintain a pressure of 15 pounds on the system. This pump draws from the river and delivers water to the hot and cold water system. There is also a bilge and service pump of 3%x4 x 4% inches horizontal duplex type, operated by air. An auxiliary air compressor of single stage 414 x 5 inches is driven by a belt from the 14-kilowatt generating set. Refrigeration Refrigeration is furnished by a unit of the Kelvinator type with a capacity of 45 to 54 cubic feet. To drive this refrigerating unit a 2-kilowatt Kohler generating set is provided. This set will also supply current for night lights. The ice box is located in the tiller room and consists of a Leonard ash case refrigerator equipped with shelves and meat hooks. Stern Wheel The stern wheel is built in two halves, each independent of the other and of 17 feet 8 inches’ diameter and 8 feet 6 inches length. There are fourteen buckets 32 inches wide made up of two inside planks 2 x 12 inches and one outside plank 3 x 10 inches all of white oak. * The stern wheel arms are made of 214 x 8-inch white oak. Each wheel has three cast steel wheel flanges. The shaft is circular, 8%4 inches in diameter and is made of forged 0.60 to 0.70 carbon steel. Rudders Tillers and Pilot Wheel Three balanced rudders are _ provided made of 38%4-inch white oak. The rudder stocks are of T7-inch double extra heavy pipe and are supported by cast steel bear- ings and rudder carriers of the conical type. compressors which are provided and the air tank capacity, the boats can meet the most unusual maneuvering conditions with a certainty that ample supply of air will be available. OF THE BENWOOD WITH HOUSING RE- MOVED—AT RIGHT—STERNWHEEL DRIVE GEARING WITH HOUSING IN PLACE 18 MARINE REVIEW—June, 1927 Rudders, Tillers & Pilot Wheel—Continued The rudder trunks are of 9-inch standard pipe properly connected to the lower bear- ings and at deck, and extending 2 feet 6 inches above deck. The rudder carriers and upper bearings are combined and are located at the upper end of the rudder trunks and effectively connected thereto. The bearings are bronze bushed and the tillers are of plate and angle type of proper strength and rigidity. The tiller line is %-inch diameter rope leading over 14-inch sheaves to the pilot house for oper- ation of the rudders by hand if necessary. There is provided a tiller indicator operated from the wheel drum. Swing of the rudder is permitted to about 37 degrees on each side. The pilot wheel is 9 feet in diameter and is provided with a 12-inch diameter cast iron drum. Life Saving Equipment Life saving equipment consists of six floats of the standard type, two ring buoys and a 16-foot work boat of river type with two pairs of oars. This boat is stowed under round bar davits with roller bushed blocks and tackle. An extra pair of davits is located on the opposite side of the vessel but without tackles. Crew’s Quarters Outside windows are of the drop type. Transoms from crews quarters to hallways are provided for air and ventilation. The toilet has a shower, two wash basins and one commode. There is provided a range fitted with water back and connected to a hot water tank. There is also a sink with drain board and built-in cupboard with glazed doors. Two mushroom ventilators 11 inches in diameter are fitted above the passage in the crew’s quarters. Equipment and Painting The vessel is provided with an anchor of about 600 pounds weight. There is also a ship’s bell of about 10 inches in diameter. A Strombos triplex whistle is provided and is piped for operation by means of air. Fire equipment, water buckets and racks for buckets, rope hooks and hangers are furnished. A jack staff is provided and a lashing ring is fitted at the stern bulk- head. When the vessel was under cun- struction all steel faying surfaces were given one coat of red lead before as- sembling. After riveting up the entire steel structure except in way of fuel bunkers was given one coat of red lead and two finishing coats of the final color. The woodwork in way of crew’s quarters was given one priming coat of white lead and two finishing coats of final color and two coats of varnish. The exhaust from the main en- gines is handled in each case by a copper exhaust pipe which attaches to the exhaust manifold of the en- gine and passes up to a water base which forms the base of each stack. This water base cools and cleans the exhaust and also has some silencing effect. The auxiliary units also ex- haust into these water bases. One _ interesting detail connected with the Climax auxiliary gasoline engine units is the fact that these units, one of which is 60-horsepower, 4-cylinder, 6 x 7-inch unit driving a 40-kilowatt generator and the other 24-horsepower engine of 4 cylinders, 5 x 6% inches driving a 14-kilowatt generator, are radiator cooled. The explanation for this method of cool- ing is that these engines are frequent- ly operated while the vessel is tied up at the wharf and it was desired