A new energy saving type VLCCs (Very Large Crude Carrier) the 'M/V Okinoshima Maru', equipped with the CRP (contrarotating propeller) system was built at IHI Kure Shipyard and delivered to Idemitsu Tanker Co., Ltd. in August 1993. The propellers are driven by a star compound type epicyclic gear using roller bearings instead of journal bearings to maintain the load bearing capacity even at low rotational speed. The CRP system installed on the vessel is an advanced version for VLCCs based on the remarkable results obtained from the first CRP ship, 'M/V Juno', a 37000 DTW bulk carrier, which was converted to CRP in 1989 and has been working satisfactorily since. The advanced CRP system has achieved a greater energy saving of 14 % compared with a newly build VLCC with an ordinary popeller in sea trials and the M/V Okinoshima Maru is continuing busines voyages successfully. Besides the maneuverability performance is better compared to a sister ship with a conventional propeller, allowing to turn around in a smaller circle and to stop on a shorter distance.
Development of contra-rotating propeller system for 'Okinoshima Maru' - a 258,000 DWT VLCC
Entwicklung gegenläufiger Schiffsschrauben für den 258.000 tdw Rohöltanker Okinoshima Maru
1995
6 Seiten, 12 Bilder, 2 Tabellen, 6 Quellen
Conference paper
English
SPECIAL FEATURES - Japan - Contra-rotating propeller for new Idemitsu VLCC
Online Contents | 2003
Rotol contra-rotating propeller
Engineering Index Backfile | 1942
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