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18 direct-current motors and three 25- horsepower 725 revolutions per min- ute direct-current motors. As a remarkably fine working ma- chine the locomotive wrecking crane of 200-tons capacity mounted on two 6-wheel trucks, is of special interest. It is capable of easily lifting the entire main engine, weighing 75 tons, or a boiler, weighing over 50 tons, intact from its foundation in the ship’s hold and placing it on a specially built flat car. The time required to lift one engine and two boilers from a ship and placing all of them on flat cars averages 1% hours. As it travels “on the standard gage track it can readily be moved to any part of the storage sector and can unload boilers, and engines from flat cars and place them in position for storage. This powerful crane has been designed for the heaviest class of railroad wreck- ing service and provides the maximum lifting capacity obtainable in the lo- comotive type of crane. It is pro- vided with Westinghouse air brakes, telescopic outriggers and is _ fitted with a boom 50 feet long to main hoist pin with an 8-foot extension to the auxiliary hoist pin. The lifting capacity with outriggers in place is 200,000 pounds at a 30-foot radius and 160,000 pounds at 35-foot radius. The weight of this crane ready to operate is 366,000 pounds. It is operated by steam. The foundation in- MARINE REVIEW way of the dock at the point where the industrial wrecker operates re- quired 88 piling driven into the ground and tied together with con- crete. Each piling is estimated to hold a load of 25 tons. There is a maximum reaction at the end of the center outrigger, 13 feet from the center of the crane, of 350,000 pounds. Special Dry Dock Built Another very special and interest- ing piece of equipment is the dry- dock moored at the extreme far end of the slip and used for the final step in scrapping ships. This dry- dock was designed and constructed by the Great Lakes Engineering Works, Detroit, and was delivered to the Fordson plant June 5, 1926. It was ordered on March 22. The weight of the drydock is approximately 500 tons and the lifting capacity is an equal amount. It is built in one sec- tion, the length of the pontoon be- ing 250 feet, depth 5 feet, length of side walls 150 feet, width of side walls 5% feet and depth of side walls 12% feet. It is built of 12%-pound steel plate throughout with transverse floors of 14-pound plate every 25 feet. There are three lines of trussed longitudinals on each side of the center keelsom. The framing is on the transverse system and is of 3 x 5 inches by 9.8-pound angles spaced 30 October, 1926 inches. Seven lines of concrete gird- ers run longitudinally on the deck of the pontoon spaced six feet apart each concrete girder is 17 inches high and 12 inches thick and is for support to the bottom of the vessel when: docked. Four centrifugal pumps are installed in the side walls on one side of the dock where they may be controlled easily. They are driven through vertical shafts by 5-horse- power motors installed on the top of- the side walls. The suction side of each pump is connected to a cast- iron header having two six-inch suc- tion lines leading to the pontoon on each side of the center keelsom. The pontoon is divided into 12 water-tight compartments. An 8-inch filling valve is also connected to each header.. There is a six-inch valve on each six- inch suction line on the pump dis- charge and an eight-inch valve on the filling side- of the header. The stems of these valves are carried up through the deck of the side wall to stands 20 inches high with hand-con- trolled wheels. Connections are pro- vided on headers at each end of the dock, for air, gas, oxygen and elec- tric power. This drydock may be rebuilt to handle commissioned ships within its capacity by adding approximately 30 feet in length to the present side walls and 10 feet in height for the length of the present side walls. It ON THE WAY TO DESTRUCTION—UPPER LEFT—AUG, 25, 1926— FOUR BOATS IN TOW ON LAKE ERIE APPROACHING DETROIT— UPPER RIGHT—JUNE 18, BOATS LINED UP ALONG WHARF FOR SCRAPPING—LOWER LEFT—JULY 16— GUTTED AND NEAR- LY READY FOR LAST STEP IN DRY DOCK—LOWER RIGHT—JUNE 23—REMNANT OF HULL BEING CUT UP IN DRY DOCK