Page 40: of Maritime Reporter Magazine (April 1992)

Propulsion Update

IHI's Contra rotating Propeller

To Be Installed On VLCC Scheduled

For Commissioning In 1993

Ishikawajima-Harima Heavy

Industries Co., Ltd. (IHI) of Tokyo,

Japan, received an order early last

September from Idemitsu Tanker

Co., Ltd. to build a 253,923-dwt

VLCC which will be equipped with

IHI's contrarotating propeller (CRP) system. The ship, to be the first IHI

VLCC to have a CRP, is scheduled to be commissioned in August 1993 and will engage mainly in the shut- tling service between Japan and the

Middle East for Idemitsu Kosan Co.,

Ltd.

In 1980, IHI started an R&D program for CRP systems for large merchant vessels, based on its longstanding research on propeller, shaftings, gear systems and experi- mental tank techniques. The efforts reached a high point in 1987 with a retrofit project on the existing 36,415-dwt bulk carrier, Juno, using a design developed for this purpose.

Juno underwent sea trials in

December of 1988 to establish her performance as a conventional pro- peller ship. The retrofitting of the

IHI CRP system was carried out in

January of 1989.

Immediately after the retrofit,

Juno, reborn as a CRP ship, under- went another series of sea trials which demonstrated the efficiency of the IHI CRP system. The trials showed a power savings of up to 15 percent compared to the conven- tional propeller performance. The results of these tests were reported at the 1990 annual meeting of the

Society of Naval Architects and

Marine Engineers (SNAME).

Juno has already spent three years of profitable and trouble-free services as a CRP ship. It is ex- pected that the same level of perfor- mance success will be realized with the new VLCC installation.

For a free brochure detailing IHI's

CRP system,

Circle 17 on Reader Service Card

IHI's Contrarotating Propeller

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