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Diesel Direct Drive in Twin Screw Yacht Samona Two Engines—Each 265 B. H. P. Engine Name of Engine—Foos Type L.; Year—1927 Builder—The Foos Engine Co.; Cycle—4 No. of Cyls.—8; B. H. P.—265; I. H. P.—320 Action—Single; Injection—Solid; Pist. Coolg.—No Bore—8% in.; Stroke—11 in.; R. P. M.—600 Piston Speed—1100 ft. p. m.; Press. Ind.—85 Pressure Brake—70; B. H. P. per Cyl.—33 I. H. P. per Cyl.—40; Mechanical Eff.—82% Stroke-Bore—1.27; Working Strokes per Rev.—4 L. O. A.—15 ft. 1% in.; Height O. A.—6 ft. 6 in.; Above floor line, 5 ft. 6 in.; Width O. A.—52 in. Weight—One engine, 21,00 lbs. including clutch, thrust bearing, air compression, fuel and water pumps; Lbs. per b.h.p.—79; Lbs. per i.h.p.—65% Reversing—Direct, by sliding camshaft Air Compressor—Direct connected single acting Vessel Name—Samona; Built by N. J. Blanchard Boat Co. in 1923. Altered to twin screw in 1927 Twin screw yacht SAMONA—Equipped with two DESCRIPTION Two engines of this size and type, direct connected to separate propeller shafts are in- stalled in the diesel yacht SAMONA. ‘The engine is a full diesel, four cycle, solid injec- tion, completely en- closed, marine type. Lubrication by pres- sure feed is carried to all bearings and other parts. The system is automatic, centrally controlled and _indi- cated. Type—Yacht, wood, ocean going : Main Drive—Twin screw diesel, direct connected Length O. A.—115 ft.; Beam—17 ft. 10 in. Depth—7 ft. 11 in.; Draft—6 ft.; Speed—13% kts. Remarks The yacht SAMONA was designed by L. E. Geary and was built at Seattle, 1923, by the N. J. Blanchard Boat Co: The vessel, built of wood, originally came out with triple screws driven by diesel engines of 100 horsepower each. In 1927 it was decided to change this yacht to twin screw. It was finally decided to install two 8-cylinder type L, completely enclosed, high speed Foos diesel engines, each of 265 brake horsepower at 600 revolutions per minute. In Lloyd’s register of American yachts the owner of the SAMONA is listed as W. J. Hole, a rancher of Arlington, Calif. An interesting feature of this yacht is the rosewood finish which was sawed from seven large logs shipped to Seattle from Honduras especially for this job. 265 H. P. high speed Foos diesel engines MARINE REVIEW—November, 1927 53