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374 Rivadavia's Trials The Argentine battleship Rivadavia, built by the Fore River Shipbuilding Corporation, Quincy, Mass., under- went her trials on the Rockland course during the week of Sept. 15. On a standardization trial of five miles she made the first mile. in 22.551 knots, the tide being with her. On the second mile, against the tide, she made 22.486 knots. The third . faile THE MARINE REVIEW then, under the action of the steam, the piston was driven downward, strik- ing hard on the cylinder bottom and lower stuffing box with the curious result that the threads of the piston rod nut were entirely stripped and the piston rod and crosshead fell into the crank pit, leaving the piston and piston rod nut inside. of the cylinder. In this connection it may be noted «that the piston rod nut was square thread- was run at 22.556 and the fourth at ee. 338... 'The concluding mile was fin- = "ished, in n 22.567. Her contract require- : ments. "are 22.50 knots. The battleship completing a prevented from ue 'thirty-hour run. through some minor "accident. The Rivadavia a 585 tt. _ long and 98 f 'beam. Her trial dis- - placement was 2 600 tons and_ full "load displacement 30,600 tons. Her _ armament consists of twelve 12-inch guns, twelve 6-inch guns and sixteen | 4-inch guns. The avérage of the trial speed runs was slightly over 22.5 knots, the horse power 39,750, and the revolutions 270 per minute. These trials were followed by gun trials and it was found that the structural parts of the ship withstood the shock of firing absolutely without injury. The vessel will be delivered to the Argentine Republic early in 1914. Engine Repairs to Steamer America On Friday morning, August 29, the steamer America arrived at the Mani- towoc Ship Building & Dry Dock Co. plant; Manitowoc, Wis., in tow of the wrecking steamer Favorite with her high-pressure engine entirely disabled. This happened while the steamer was bound for Green Bay with a cargo of coal. The crosshead pin strap on the high- pressure connecting rod broke and opened up allowing the piston rod and crosshead to become disconnected from the connecting rod. This hap- pening on the up-stroke allowed the piston to strike the upper cylinder head, fracturing the same badly and BATTLESHIP RIVADAVIA READY FOR HER TRIAL ed, which, of course, would offer only half the resistance "tO. Shear of 4. V thread. As the steamer was entirely dis- abled R. A. Walliams, manager of the North American Steamship Co., own- ers of the vessel, decided to have her the piston broken right across. her arrival, October, 1913 bottom cylinder heads fractured and Work was started at once on the new parts to replace these. The new cylinder, weighing approximately 8,000 lbs., was cast Thursday night, Sept. 4, and was machined, tested and ready for installation by Friday morning, Sept. 12. A' new piston, piston rod, upper' and lower cylinder heads and connect- ing rod strap were made and finished in the interval, and on Sunday, Sept. 14, at 9:30 p. m., or 16% days after the America left Manito- woc for Escanaba to load ore for 'Lake Erie ports. During the enforced lay-up of the America opportunity was taken to re- bore the low-pressure cylinder and fit new rings to its piston. These repairs, made in remarkably - good time by the Manitowoc company, were under the supervision of E. V. Barry, chief engineer for the North American Steamship. Co., and T.-C. Warkman, representing the under- writers. Novel Use for Floating Dry Dock The accompanying photograph indi- cates the novel use to which a float- ing dry dock may sometimes be put. This brick building was moved in one NOVEL SERVICE FOR A FLOATING DRY, DOCK towed to Manitowoc to undergo re- pairs at the Manitowoc Ship Building & Dry Dock Co. plant. Immediately upon her arrival on the morning of August 29 examination was made and showed that the cylinder bottom was badly cracked, the top and of the sections: of the floating dry dock belonging to the Manitowoc Shipbuilding & Dry Dock Co., Mani- towoc, Wis. The building was moved for several blocks without disturbing a brick or even making it necessary to remove any of the furniture.