Overview
The document discusses the propulsion gears used in fast ferries, specifically the RENK BS 210 type gear, which set a new record for fast ferry propulsion power trains. This system is used in powerful waterjet drive systems, connecting the GE LM 2500 plus gas turbine to the RENK double stage marine gear type BS 210.

Technical Specifications

• Central Booster Gears: The RENK BS 210 features a two-stage horizontal offset gearing in a double helical design, with an overrunning SSS clutch on the gas turbine input side. It has an input power of 25,000 kW, input speed of 3,587 rpm, output speed of 423 rpm, a horizontal offset of 2,100 mm, and a dry weight of 28 tons.
• Wing Gears: The RENK AOSL 72, used on the Aeolos Kenteris, is driven by a SEMT Pielstick 20 PA 6B STC diesel engine with an input power of 8,100 kW, input speed of 1,050 rpm, output speed of 445 rpm, center distance of 720 mm, and a dry weight of 4.9 tons.

Vessel Data

• Corsaire 14000 “Aelos Kenteris”: Length of 140 meters, capacity for 1,740 passengers and 440 cars, with an MCR speed of 40 knots. Built by Alstom Leroux Naval, Nantes, and owned by NEL Lines, Greece.
• Corsaire 13000 “NGV Liamone”: Length of 134 meters, capacity for 1,110 passengers and 285 cars, with an MCR speed of 42 knots. Built by Alstom Leroux Naval, Nantes, and owned by SNCM, Marseille.

Design and Integration
The RENK AOSL 72 wing gears provide a diagonal offset to meet space requirements and include integral multi-disc clutches. The design emphasizes lightweight construction combined with high gear load capacity, achieved through precise toothing profile corrections. The gear units come with individual lube oil supplies and multiple monitoring interfaces for seamless integration with the ship control system.