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Brødrene Aa builds carbon fibre e-ferry

Source: Brødrene Aa

Brødrene Aa’s Future of the Fjords will sail 18 nautical miles between the villages of Flåm and Gudvangen, entirely on batteries

Brødrene Aa will deliver the full-electric tourist boat Future of the Fjords in the first half of 2018. It is the sister ship of the renowned Vision of the Fjords, named Ship of the Year in 2016.

While Vision is a hybrid that switches between battery and diesel power, Future will be powered by batteries alone. The 42m-long sightseeing vessel will offer a front-row viewing space for all 400 passengers aboard.

Future of the Fjords is powered by two 450 kW electric motors. The battery capacity is 1,900 kWh, requiring the possibility to charge 2.4 MW power at the quays of Flåm and Gudvangen, respectively.

The floating charging dock will also incorporate a battery pack. Made to handle larger vessels, it will be 40m long and 5m wide, and will include a 2.4MWh battery pack, a 40 m3 diesel tank, as well as a 20m3 tank into which waste water can be emptied. It will therefore serve both of Aa’s tourist catamarans.

In order to reduce energy consumption, Brødrene Aa needed to make it as light as possible. That is why both the hulls and the superstructure of the catamaran are being constructed using lightweight carbon-fibre composite materials, reducing approximately 50% of the weight compared to traditional materials. In addition, the solution offers a great deal of construction freedom, allowing for a design that efficiently reduces waves and thus the impact erosion of the shores of the Nærøyfjord.

Diab has been working with Brødrene Aa since 1974. The partners have developed several fast-going ships in Divinycell FRP reinforced panels. As an early champion of carbon-fibre sandwich constructions, Brødrene Aa appreciates the reduced weight and the increased strength of the material. Compared to fiberglass sandwich and aluminum, carbon fibre provides four times the rigidity of fiberglass reinforcement, as well as two to three times the tensile strength.

Source: Diab


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