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leg derricks each equipped with a two yard grab bucket. , Each derrick is operated by a Swinging engine, a boom hoist and a two drum grab engine, these engines are controlled by one operator from a cab built in the derrick framing. A crew of 26 men including derrick operators, will be carried. The accommodation is of a _ high class for this type of ship. The dining room, captain’s and chief en- gineer’s quarters are panelled in oak. Hot and cold running water is sup- plied to each room, and all quarters are steam heated. Electric light is fitted throughout. A one ton ammonia refrigerating plant has been installed. The vessel is propelled by one triple expansion surface condensing engine having cylinders 15%-inch, 26-inch and 44-inch diameter with 26-inch stroke. Steam is supplied, by two scotch marine boilers each 13 feet in diameter and 11 feet long, under natural draft and a working pressure of 200 pounds. The vessel is intended for service on Lake Erie and will carry sand and gravel from the Canadian side to American ports. On the trial run, Sept. 1 the SAnp MERCHANT on a draft of 12 feet 8 inches aft and 7 feet 9 inches forward, maintained a mean speed of 10.42 knots and a speed of over 10 knots loaded is anticipated. Launch Self-Unloading Cement Vessel HE Huron Portland Cement ; Co., Detroit, added another ship to its fleet of bulk cement carriers on July 7, when the S. T. Crapo, the largest and most modern gelf-unloading bulk cement carrier on the Great Lakes, was launched at the yard of Great Lakes Engineer- ing Works at Ecorse, Mich., on the Detroit river. This new steel bulk cement carrier has a _ capacity of 7500 tons, equivalent to 160,000 sacks of cement. A pioneer in transportation of bulk cement on the Great Lakes, the tuunique mechanical equipment of this vessel was built from designs by the Huron company’s engineers. Many of the special mechanical features are patented by the company. Herbert ©. Sadler, professor of naval archi- tecture and marine engineering at the University of Michigan, acted as consulting naval architect. The S. T. Crapo joins the JOHN W. BOARDMAN and SAMUEL MITCHELL, other self-unloaders of the Huron Transportation Co., the vessel operat- -ing subsidiary of the Huron Portland Cement Co., and will be employed exclusively in transporting cement for the company’s plants at Alpena, Detroit and Wyandotte, Mich., Duluth, Minn., Milwaukee, Wis., Cleveland, and Buffalo. In hull dimensions, the new steam- er is 400 feet long, has a depth of hold of 29- feet and is 60 feet wide. Three scotch marine boilers and a 2000 horsepower triple expan- sion engine will give a running speed of 13 miles per hour. The electrical equipment includes three turbo gen- erators. The cost complete exceeded $1,000,000. A crew of 35 men is re- quired when she is in operation. Her unique mechanical equipment enables the new ship to unload a capacity cargo equivalent to 160,000 sacks of Portland cement in 10 hours without aid of any unloading ma- chinery on the docks. <A _ capacity load can be taken on in four hours. One of the interesting and unusual features of the launching of the CRAPO was the fact that smoke is- sued from her stack and a blast from her own whistle answered the salutes of steamers in the vicinity as she slid down the ways! into the water. Credit is due the Great Lakes Engi- neering Works for the efficient man- ner in which the difficult job of build- ing the vessel was carried out. A passenger steamer, the Wau- KETA, was chartered exclusively by the Huron Portland Cement Co. to privately conduct the launching party of 600 invited guests to the ship- yard. Promptly after the arrival of the party at the shipyard on the Detroit river the new steamer was successfully launched. Miss Anita Boardman, of John W. Boardman, daughter vice presi- dent of the Huron Portland Cement Co. christened the S. T. Crapo, named after Stanford T. Crapo, treasurer of the ‘secretary- company. The christening party included John B. Ford, president of the Huron Port- land Cement Co., John B. Ford Jr., Fred Ford, John W. Boardman, W. W. Crapo, son of S. T. Crapo, and Paul H. Townsend, connected with the Huron company, also W. B. Mayo and E. G. Liebold of the Ford Mo- tor Co. A number of guests were present from various. sections of Michigan and adjoining states, among whom were B. F. Affleck, president of the Universal Portland Cement Co., and George S. Bartlett of the Uni- versal company, Chicago, and Wm. M. Kinney, general manager of the Portland Cement association. Following the launching, luncheon was served to the guests on board the WAUKETA and the party was taken to the company’s private dock at Wyandotte, Mich., for an inspec- tion of the new Wyandotte cement manufacturing plant before the return trip to the docks at Detroit. THE HURON PORTLAND CEMENT CO.’S NEW SELF UNLOADING BULK CEMENT CARRIER S. T. CRAPO LAUNCHED JULY 7 AT THE GREAT LAKES EN.- GINEERING WORKS, DETROIT MARINE REVIEW—October, 1927 25 SO seh aE ee RR RAN ME et TS RE