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BOB GRESHAM—Towboat—Rivers—Sternwheel—Diesel Name—Bos GRESHAM Owner—W. G. Houghland, Bowling Green, Ky. Builder—Nashville Bridge Co., Nashville Naval Architect—Nashville Bridge Co. Launched— Apr. 28, ’33; Comp. Aug. 14, ’33 Classification—Owner’s requirements HULL PARTICULARS Length over all, 131 feet; length between per- pendiculars, 100 feet; breadth, molded, 24 feet; depth molded, 4 feet, 6 inches; draft, 3 feet, 2 inches; bunker diesel fuel capacity, in tons, 36; speed, 10 statute miles per hour. MACHINERY PARTICULARS Main Engine—One, Fairbanks-Morse Co., two cycle, six cylinder, solid injection, diesel engine, connected by means of gearing and chain drive to sternwheel operating at 22 revolutions per minute. Brake horsepower of engine is 300 at 360 revolutions per minute; cylinder diameters 10% inches by stroke of 12% inches. This en- gine is known as model 37F-M. Auxiliary Generator—One, 15 kilowatts, 125 volts, driven by a Fairbanks-Morse diesel en- gine; a 5 horsepower direct current motor is connected to the same shaft. There is also a 56-cell electric storage battery for lighting and for operating the smaller electric motors. AUXILIARY EQUIPMENT Pumps—Fairbanks-Morse Co. Steering Gear (Steam )—Gardner Searchlight——Carlisle & Finch Co. Plumbing, Valves, Fittings—Crane Co. Gear Transmission—Keck-Gonnerman Co. Galley Range—Elisha Webb & Son Co. Dale es v4 . 74 SHAFT CENTERS DESCRIPTION This modern steel hull and steel super- structure river towboat is one of the latest ves- sels added to the fleet of the owner in trans- portation of bulk com- modities including structurel steel, as- phalt rock, gasoline and other products. REMARKS The Bos GRESHAM which was designed and built for the owner, Capt. W. G. Houghland, Bowling Green, Ky., by the Nashville Bridge Co., Nash- ville, Tenn., entered service without the formality of a trial trip. On her maiden voyage, from Nash- ville to the mouth of the Cumberland river, she towed three steel barges and returned to Nash- ville on a rising river with these barges loaded with 1500 tons of steel. Since this initial voyage, the Bons GresHAm has been continuously in service towing barges load- ed with gasoline for the Apex Oil Corp., Nashville, As always in the installation of a diesel engine to a sternwheel drive the method of transmitting the power to the paddle wheel is of special in- terest. In the Bop GresHaAm the six cylinder, 300 horsepower, diesel engine is located on the center- line of the main deck, so that the center of the en- gine clutch is about 70 feet forward of the tran- som line at the stern. The center of the stern wheel is 11 feet aft of the same transom line. The centerline of the line shafting is 2 feet, 1% inches above the deck and is Supported in five journal bearings, The shaft is 47% inches in diameter. Power to the sternwheel which is 15 feet, 6 inches in diameter by 16 feet wide with 27 wooden buckets, is transmitted from the engine line shaft- ing by beveled gears through chain reduction to a lay shaft and thence by sprocket chain reduction drive, from both ends of lay shaft to the stern- wheel itself, which operates at 22 revolutions per minute. Sternwheel shaft is split at the cen- ter bearing. PART LONG SECTION AT WHEEL BEAM SECTION B-8' MARINE REvIEw—April, 1934