Page 28: of Maritime Reporter Magazine (July 1984)

Diesel Power

Review—Hanshin (continued from page 27) ries has been reduced by approxi- mately 11 percent compared with conventional diesels of this class.

A long-stroke (700-mm) design permits improved thermal effi- ciency in the expansion stroke.

The fuel injection characteristics have been improved by using a high-pressure injection pump. Im- proved and well-matched exhaust timing have enhanced supercharg- ing efficiency.

Low-grade fuel may be used; satisfactory combustion can be ob- tained because of the higher injec- tion pressure. The low engine speed brings about improvements in pro- peller efficiency of approximately three percent.

The 6EL35 engine has an out- put of 2,400 bhp at 260 rpm; the 6ELS35 produces 2,600 bhp at 260 rpm. Both models have a bore of 350 mm and stroke of 700 mm.

Specific fuel consumption is 138 grams per bhp hour.

ISOTTA FRASCHINI

Circle 45 on Reader Service Card

Isotta Fraschini S.p.A. is a com- pany of the VM Group, the diesel engine sector of Finmeccanica of

Italy. Isotta has been designing and building engines continuously since 1909. It is headquartered in

Saronna, about 15 miles from

Milan, with a second major facility located in Bari on the Adriatic

Sea.

Isotta designs and manufactures a broad range of diesel engines for diverse applications. The ID 32 en- gine series for marine propulsion has a power output range from 180 to 400 bhp at 2,700-3,000 rpm. The ID 38 series when used for marine propulsion is rated from 180 to 400 bhp at 2,700-2,900 rpm for workboat use, 500 bhp at 3,000 rpm in military applications. The

ID 36 engine type is rated 300- 1,320 bhp at 1,650-1,800 rpm for workboats, and up to 1,600 bhp at 1,900 rpm for military craft.

The ID 36 diesel engines are available in V-form models with six, eight, 12, and 16 cylinders; a 10-cylinder version is presently under development. All production engines in this series are available in amagnetic versions. Isotta also manufactures, under license, the

Paxman Diesel model PV2000 en- gine, which has a power range of 1,000-4,500 bhp at 1,600 rpm.

The ID 36 SS6 V-AM amagnetic engine is being supplied to the

U.S. Navy for its mine counter- measure ship program. This en- gine has a continuous power rat- ing of 660 bhp at 1,800 rpm for ambient temperature of 78 F; when derated for 100 F, output is 620 bhp at 1,800 rpm. Parallel opera- tion of two ID 36 SS6 V-AM en- gines into a common gearbox pro- vides a continuous output power of 1,320 bhp at 78 F ambient.

Cost of ownership/life cycle costs for the ID 36 SS6 V-AM engine is reduced through high reliability and time between overhaul, and low maintainability. Because the engine's magnetic signature is permanent, it never needs to be removed from the ship for periodic degaussing. ID 36 series engines have demonstrated mean time be- tween overhaul in excess of 14,000 hours per engine on 134 units op- erating more than 1.9 million hours. The manufacturer reports, through use of Reliability Cen- tered Maintenance, the need for periodic overhauls is non-existant, thus making MTBO in excess of 20,000 hours.

Users of ID 36 type diesel en- gines for marine applications have included: the Italian, Iraqi, and

Thai Navies; hovercrafts in Fin- land; Italian fishing vessels; pas- senger ferries in Italy, France, and

Thailand; and, when the first MCM ship enters service, the United

States Navy.

JOHNSON & TOWERS

Circle 24 on Reader Service Card

One of the most extensive sin- gle-source selections of marine diesel power—15 to 4,000 bhp—for all manner of workboats and com-

WILDEN AIR OPERATED

DOUBLE DIAPHRAGM PUMPS offer • No Electrical Connections • Abrasion Resistant • Self priming • Submersible • Variable volume and pressure • Portable • Simple Clamp band construction • Write for free literature and prices

In

Water. . one stands alone

It also stands up to chemicals, grout, resin, oil, glue and low density powders.

The heart of the Wilden air-oper- ated double diaphragm pump is its unique air valve which shifts the air supply to both dia- phragms alternately with com- plete reliability under all condi- tions of head and flow.

Up to 90% solids and over 250' heads are no problem for the

WILDEN PUMP. Our double diaphragm design cuts velocity in pump to half total discharge velocity. The most abrasive slur- ries are handled with ease since there are no seals and no metal to metal contact.

Volume is infinitely variable by controlling air flow to pump, from a few gallons per minute to over 14,000 gallons per hour. No pressure relief valve is required and the pump can run dry inde- finitely.

Wilden pumps are available with wetted parts in aluminum, cast iron, stainless steel, and Hastel- loy C. Non-wetted parts in alu- minum or cast iron. Elastomers in Neoprene, Buna N, Nordel,

Viton®, and Teflon*.

WILDEVM PUMP Sl ENGINEERING CO. 22069 VAN BUREN ST.. P.O. BOX 845. COLTON, CALIFORNIA 92324 (714) 783-0621 / TELEX 676-452

PTO is remote operated, self-adjusting, affordable! control cable attaches here adapters to fit most engines keyed or flanged shaft available

If remote operation and low maintenance are your design require- ments, then

Capitol 'in-line' hydraulic PTOs are the design solution.

Shifting is fin- gertip-easy and controls can be mounted any- where. Costly, cumber- some power assistance is eliminated. Maintenance is greatly reduced because the oil operated clutch is self-adjusting. shallow sump optional where space is tight

Models are available from 100 to 1600 hp capacity and options in- clude a reversing clutch and flang- ed output shaft.

All PTO units are backed by a responsible war- ranty policy and an international service network.

For details, contact:

Capitol Gears, Inc., 349 N.

Hamline Ave., St. Paul, MN 55104. Tel. (612) 645-9491.

Ask for free brochure no. 1-DD179.

Capitol Gears, Ino. .. dependable gear products since 1905! 30 Circle 179 on Reader Service Card Circle 260 on Reader Service Card