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42 MARINE REVIEW Engine Name of Engine—Ingersoll-Rand, Type PR Builder—Ingersoll-Rand Co. Cycle—4; No. of Cylinders—6; B. H. P.—840 Action—Single; Injection—Direct Piston Coolg.—Oil; Bore—19%% in.; Stroke—24 in. R. P. M.—225; Piston Speed—900 ft. p. m. Pressure Brake—69; B. H. P. per Cyl.—140 Stroke to Bore—1.23; Wkg. Strokes per Rev.—3 Leth. O. A.—88 ft. 3 in., with generator and exciter Height O. A.—13 ft. 6 in.; Width—é6 ft. 10 in. Weight—One engine, 160,000 lbs.; One engine, 190 ibsaper BH. P, Reversing—Non-reversing; electric drive Air Comp.—Auxiliary for starting only Vessel Name—J. W. Van Dyke; Conversion-—Staten Island Shipbuilding & D. D. Co. Type—Single screw ocean going tanker Main Drive—Diesel-electric (motor) Length B. P. P.—365 ft.; Length O. A.—380 ft. Beam—50 ft. 9 in.; Depth—381 ft. 3 in. Deadweight—7500 tons; Speed—11 knots Diesel Electric Drive in Tanker J. W. Van Dyke Three Engines—Each 840 B.H. P. DESCRIPTION Three engines of this size and type, each direct-connected to a generator, were in- stalled in the tanker J. W. VAN DYKE. The engine is of single acting, trunk piston, direct -injection type and operates on _ the four-stroke cycle. It combines the simplicity of the so-called semi- diesel with fuel econ- omy and cold starting features of the air injection diesel engine. No. of Propellers—One; Fuel Cap.—7697 bbls. Fuel Consumption—Lbs. per B.H. P. per hr.—0.40 Generators—Three of 600 kilowatts—250-volt each at 225 r. p. m. and with 50-kilowatt ex- citers attached; built by Westinghouse Electric & Mfg. Co.; each generator is driven by one oil engine of size and type illustrated and de- scribed above. Electric Motor—One, 2300 s.h.p., 750-v., 100 r.p.m. Remarks The J. W. VAN DYKE before conversion to diesel-electric drive was the S. S. ALLENTOWN. Cargo carrying capacity was increased 5000 bar- rels by the conversion and it is now 60,000 barrels. Over 100,000 miles has been logged by this tanker under direct pilot house control since May, 1925. Owned and operated by the Atlantic Re- fining Co., she has completed two voyages from Philadelphia to Rio de Janeiro and Durban, a distance of over 18,000 miles, without refueling on either voyage. Several intercoastal trips between Philadelphia and San Pedro and coastwise trips to Port Arthur, Houston and other Gulf ports have been made. November, 1926