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april 18, 2016 - BD Yachts

BD56 – More details about the all new crossover yacht

Spanish shipyard BD Yachts is pleased to release more details about the #bd56, an exclusive project that gathers in a single luxurious, original and refned “seagoing SUV” all the advantages of sail and motor boating.

BD Yachts - following the January 2016 presentation of the innovative #bd56 project, Tià Simó, Naval Architect and Managing Partner at BYDGROUP – naval architect and designers of #bd56 - provides us with more details and further clarifcations based on the questions received over these last few months.

BD56 ENGINES

Being a very unique boat, the #bd56 (designed and engineered by BYDGROUP) has very specifc needs in terms of propulsion that conventional sailing yachts and conventional motor yachts have not. While developing the project, the BYDGROUP team found that the inboard propulsion systems available were ineffcient for the BD56's particular design. For a high speed design, high thrust propellers are required, but they are unavailable in a folding version, necessary to reduce drag when sailing. Retractable propellers were another possible solution, but they are technically complicated and have reliability issues, as well as being very costly due to necessary customization.

With this specifc #yacht BYDGROUP needed the most effcient and convenient propulsion system available on the market, requiring reliability, ease of use and maintenance, a suffcient power to weight ratio, and very importantly, a way to reduce drag from submersed appendages: shafts, struts and propellers. The result was unexpected - outboard engines!

With thrust at a 0o angle to the DWL with an outboard engine, the drive applied by the propeller is equivalent to the drive applied by a conventional shaft at a 10o angle. In addition, the possibility of changing the thrust line angle provides for even greater effciency.

Given the low weight of the outboards, the position of the CoG in balancing the hull with drive applied from the stern is equivalent to that of a conventional inboard confguration.

The engines are hidden in the transom of the boat below the deck, well ventilated and with suffcient space to be lifted out of the water when sailing.

The power available for this boat is either one 200 hp engine (11,5 Knots Max) or two 350 hp engines (21 Knots Max).