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Diesel Electric Drive in Ferry Fresno Four Engines—Each 450 B. H. P. (TILER atts DESCRIPTION Four engines of this size and type each di- rect connected to a generator supplying current to a _ double armature motor direct connected to a propel- ler at each end are in- stalled in the ferry, FRESNO and five sister ferries. The engine is of the mechanical in- jection type, vertical in construction with Six single acting work- ing cylinders Engine Depth—19 ft. 9 in.; Propellers—Two (each end) Name of Engine—Nelseco 6-MI-22; Year—1927 Speed—14% Knots; Fuel Consumption” Ths, Pes Builder—The New London Ship & Engine Co. b. h. p. per hr.—0.42 ; Cycle—4; No. of Cylinders—6; I. H. P.—576 Generators—Four of 275 kilowatts each at 23 ’ B. H. P.—450; Action—Single; Injection—Solid r.p.m. of General Electric and Westinghouse Piston Cooling—No; Bore—15 in.; Stroke—22 in make; each generator driven by a diesel engine R. P. M.—230; Piston Speed—842 feet per minute of size and type illustrated and described above Pressure Indicated—85.2; Pressure Brake—66.4 Motor One Helle ee ee B. H. P. per Cyl.—75; I. H. P. per Cyl.—96 Ot 6 Mechanical Efficiency—78%; Stroke to Bore—1.47 a ee - Wkg. Strokes per Rev.—3; Leth. O. A.—18 ft. 2 in. Three of these ferries, the FRESNO, STOCKTON Height Overall—-§ £(..4% ‘in. above. shatt and LAKE TAHOE, are owned by the Southern Width Overall_4 468 Gn. Pacific Pee Co., and aes tacts three, : . . SANTA Rosa, MENDOCINO an EDWOOD EMPIRE, Mshe One enetney S00 gnc Sanne are owned and operated by the Northwestern Pacific Railroad Co. These ferries carry pas- Vessel sengers and automobiles, and the first three Name—Fresno. Sister vessels are Stockton, Lake run between Market street, San Francisco, and Tahoe, Santa Rosa, Mendocino, Redwood Empire Oakland, while the three latter operate from Mar- Type—Passenger and automobile ferry boat - ket street to Sausalito. All six of these ferries Main Drive—Diesel electric. Four generating sets are now in operation and are in service 24 hours Length B. P. P.—234 ft.; Beam—44. ft. 10 in. per day. Reversing—Non-reversing; Air Comp.—Non-fitted Some of the Standard Sizes of Engines Built LEP: B.H.P. R.P.M. Cycles No.Cyls. Length O. A. Height Width Weight 500/594 400 /475 260/280 8 18 ft.-1 in. 6 ft.-9 4% in. 3 Et, eo 7} in. 46,650 375 /462 300/370 220/250 4 14 ft.-2 in- 8 ft.-4% in. 46,200 470/575 375 /460 220/250 5 16 ft.-6 in. 8 ft.-4 4 in. ; ; 57,500 562/688 450/550 220/250 6 18 ft.-9 14 in. 8 ft.-4% in. .-8 in. 68,350 750/920 600 /735 2 8 23 ft.-4 in. 8 ft.-4% in. .-8 in. 87,500 seca ccrmecmeennn enn evecare WM 2am = HEARN EA PACIF om E FRGG SOUTH dt cdl cst a | ee GRRE RESNO Diesel-electric passenger and automobile ferry FrESNo—Four diesel generating sets—Two propulsion motors each 1250S. H. P. MARINE REVIEW—November, 1927 1%