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Diesel Geared Drive in Pilot Boat Carmina One Engine—400 B. H. P. Engine Name of Engine—De La Vergne; Year—1926 Builder—De La Vergne Machine Co.; Cycle—4 No. Cyls.—6; B. H. P.—400; I. H. P.—470 Action—Single; Injection—Solid Piston Cooling—None; Bore—14% in. Stroke—18 in.; R. P. M.—277 Piston Speed—875 ft. p. m.; Press. Ind.—73.5 Pressure Brake—62.5; B. H. P. per Cyl.—65 I. H. P. per Cyl.—76.5; Mechanical Eff.—85% Stroke to Bore—1.24; Wkg. Strokes per Rev.—3 Length O. A.—382 ft. 2 in. (including gear) Height O. A.—8 ft. 4% in.; Width O. A.—56 in. Weight—One engine, including flywheel, 60,000 , ibs.; Lbs. per B, H. P. one engine, 150; Lbs. DESCRIPTION One engine of this size and type _ con- nected to propeller. shaft by reversing and reduction gears and Metten hydraulic clutches was installed in the pilot boat Car- MINA. This engine is four-cycle, and of solid injection type. It is simple and _ reliable. Engines of the same principle have been tried out under severe condition of service. per I. H. P. one engine, 128; All machinery, 92,000 lbs.; Lbs. per B. H. P., 230 Reversing—Non-reversing Air Compressors—Auxiliary for starting Vessel Name—Carmina; built in 1903 as a steam yacht. Type—Yacht, adapted as pilot boat Main Drive—Diesel with gears and clutch Length O. A.—168 ft.; L. B. P.—140 ft. 1 in. Beam—21 ft. 6 in.; Draft—9 ft. 11 in. aft Deadweight—260 tons; Speed—12.6 knots Fuel Consumption—0.45 lbs. per B. H. P. per hour; 0.383 lbs. per I. H. P. per hour; 2.16 tons per day at full load; Radius without refueling —b50 days’ cruising time for pilot boat service. Other Standard Sizes of Engines Built HP; B. H. P. R. P. M. Cycle No. of Cyl. 470 400 277 4-cycle 6 854 300 225 4-cycle 3 470 400 225 4-cycle 4 590 500 225 4-cycle 5 705 600 225 4-cycle 6 665 565 180 4-cycle 3 885 750 180 4-cycle 4 1100 . 940 180 4-cycle 5 1325 1125 180 4-cycle 6 Length O. A. Height Width Weight 19 ft. 8% in. 8 ft. 4% in. 56 in. 54,000 13 ft. 11% in. 12 ft. 2% in. 6 ft. 6 in 47,000 16 ft. 1134 in. 12 ft. 2% in. 6 ft. 6 in. 77,000 19 ft. 11% in. 12 ft. 2% in. 6 ft. 6 in. 100,000 Oo ft. 11847 in. 12 ft. 2% in. 6 ft. 6 in 113,000 18 ft. 3 in. 14 ft. 3% in. 8 ft. 6 in. 100,000 29;,4t.. 0: in: 14 ft. 3% in. 8 ft. 6 in. 135,000 25 ft. 9 in. 14 ft. 3% in. 8 ft. 6 in. 175,000 29 ft. 6 in. 14 ft. 3% in. 8 ft. 6 in. 195,000 Pilot boat CARMINA at Kensington yard, Philadelphia after conversion to diesel drive November, 1926