TRIS Online Record

Title	CONTRAROTATING ELECTRIC DRIVE FOR ATTACK SUBMARINES
Accession No	00707787
Authors	Dutton, J L
Publication Date	19940000
Languages	English
Abstract	This paper addresses certain issues relating to the viability of contrarotating (CR) electric drive for attack submarines. Topics include CR propulsion's potential benefits, electric drive advantages, and combining contrarotation with electric drive engine room concepts. CR propellers provide propulsive coefficient (PC) increases compared to open-type and performance-enhanced single propellers. The maximum submarine propulsion plant power capacity could therefore be reduced with the PC increase, potentially resulting in a smaller, lighter propulsion plant. This paper concludes, however, than contrarotation show no propulsion plant weight savings against electric drive attack submarines with performance- enhanced single propeller designs. Weight improvements in the power generation plant and certain steam plant and electric plant systems are offset by weight increases from the additional shafting and hearing requirements for the CR shaft. Contrarotation is currently more advantageous for nonnuclear ships, where significant fuel savings are achievable with its higher PC.
Supplemental Information	Naval Engrs J, v 106 n 2, March 1994, p 45 [6 p, 8 ref, 3 tab, 4 fig]
TRT Terms	Electric drives ; Submarines
Document Source	British Maritime Technology Source Data: 94030726
TRIS Files	MRIS
Database	TRIS Online

TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.