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VOL. 38. CLEVELAND, JULY 2, 1908. NEW YORK No. 1 eee salen = Soar QUICK REPAIR TO A RUDDER FRAME. At the yards of the American Ship Building. -Co.,> Gleveland, <a «notable rudder frame repair was recently the post. The section at the fracture of the first break was, approximately, 3% in. by 8*in. in area, and. of? the second break, 4 by 10 in the Thermit welds were made with the in. STEAMER D. R. HANNA--FINISHED WELD ON CENTER BRACE AND MOLD BOX, CRUCIBLE AND TRIPOD IN made by the Thermit process on the steamship D. R. Hanna, of the Pion- ees Steamship: = Co. The rudder frame was broken in two places, one break being in the center brace, about 17 in. from the 'post, the second break being in the bow, about 15 in. from POSITION FOR WELDING. rudder in place, the weld in the cen- ter brace being made first. In preparing for the weld in the center brace a space of '1 in. wide was opened up along the fracture, the fracture in the bow being. opened up to 1% in. In constructing the molds, a collar of yellow wax, 6 in. wide and % in. thick at the midde ordin- ate, shaped about each of the fractures. A sheet iron mold box was then placed in position and filled with molding material consisting of 1/3 fire clay, 1/3 fire brick and 1/3 fre sand, provision being made for a narrow gate and large riser. A small hole at the bottom, to permit the wax to Was STEAMER D. R. HANNA--SHOWING FINISHED WELD ON BOW, HOLES DRILLED IN RISER PRELIMINARY TO REMOVING SAME. escape when heated, was also pro- vided for in the mold. When all preparations were made the flame of a powerful compressed air gasoline torch was directed into the lower hole, melting the wax and bringing the sections to be welded to a bright red heat. The time required for this amounted to 2 hours in the case of the center brace, and 1% hours for the fracture in the bow. While the heating was in progress, a crucible, containing the 'welding por- tion of Thermit was suspended over