New era of trimaran hybrid trawler yachts 

TRANSFLUID present the new LEEN 56 and 72 hybrid, thanks to the collaboration between NEEL-TRIMARANS and BELLMARINE.

Elegance, confort of navigation and respect for the environment, here are some of the caracteristics of the new LEEN 56 and LEEN 72 Hybrid Travel Yachts. The trimaran hybrid trawler yachts are equipped with an innovative, high performance and strong reliable propulsion system. Thanks to the 2 electric motors on the outer hulls, and a central thermal engine on the main hull, the LEEN trimarans have a propulsion adapted to all situations and navigation program.

Equipped of a Bellmarine electric motors DriveMaster 15kW in each hull developing 15kW, with liquid cooling system, it allows for smooth manouverings and around 7kn maximum speed without noise and in a eco-responsible navigation. The electric propulsion is able to run continuously the yacht at almost 5kn with the support of the ONAN Genset, for tremendous range and very limited pollution. With an important pack of Lithium batteries 48Vdc both for propulsion and boat services, it provides a very satisfying authonomy. No maintenance needed for the Bellmarine motors and thanks to their small volume they can be fitted in nerrow places.

LEEN-TRIMARANS has chosen robust, reliable, and approved systems from the motorisation industry and adapted them to the Yachting industry. The Cummins main engines – “Intermittent Duty” for the 56 and “Heavy Duty” for the 72 – are designed to run 24 hours a day / 7 days a week. For the electric motors, LEEN-TRIMARANS has opted for Bellmarine, a manufacturer highly reputed in the sailing world for its electrical systems. These electric motors are exceptionally reliable, as evidenced by their use in many professional vessels.

Reliability and safety

The combustion engine gives you a cruising speed of around ten knots.

The two electric motors:

– Allow you to silently arrive at or leave an anchorage

– Give you perfect manoeuvrability in harbours

– Act as a back-up for the combustion engine.

The three motors are mounted in line with the shaft so as to minimise the number of intermediate components and consequently the mechanical wear of the systems. This assembly reduces pressure losses, thus optimising drive efficiency.

LEEN trimarans have very low fuel consumption. This is due to the narrowness of their three hulls and the considerable length of the main hull; the weight distribution; and the hybrid engine, which has a range of 4,000 nautical miles at eco speed and 2,500 nautical miles at cruising speed, with a 5,000-litre tank.

A unique hybrid motorisation system laid out across three hulls: Hybrid engines are a particularly appropriate choice for the LEEN as the boat’s layout allows each of the drive systems to operate at optimum range. All situations of use favour the performance, maintenance, and consumption levels of these engines.


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