The innovation formula
Candela’s unique design goes beyond state-of-the-art. It is the world’s first electric recreational boat with hydrofoils. Several patent applications have been filed. The product is based on the following technical findings and inventions:
Hydrofoils give a 50 % reduction in energy consumption. Reduced power consumption enables electric propulsion with a good range of operation. Fully submerged hydrofoils also mean a steady cruise without slamming and with minimal wake build-up – good for the local environment.
A patent-pending foil control system where the control of height, roll and pitch is made exceptionally robust. All submerged foil systems seen on all larger commercial vessels rely on flaps/ailerons, which would not be robust enough for a consumer product.
A unique retraction mechanism solves the issues met in shallow waters, while trailing and during storage. The front foils are retracted vertically and protected by a step in the hull. The aft foil is retracted through a double rotational movement and protected by the swim platform
A state of the art flight controller that captures the boat’s movements from 7 sensors and establishes the full-state 3×6 state matrix (position, velocity and acceleration with regards to position in x, y and x and rotation around the same axis) using advanced sensor fusion algorithms. This is needed since the boat is inherently unstable in roll and height. The position of the actuators controlling the forward and aft foils is updated at 100 Hz resulting in a very smooth and steady ride even in tough wind and sea conditions.
Ultra-light hull materials are used to offset the battery weight and to further reduce the power needed. A carbon fibre single skin in hull, deck, hydrofoils and interiors reduces the weight of the boat, including 230 kg batteries and all equipment to less than 1000kg. The hull weight is approx. 180 kg and the deck 60 kg – a conventional glass fibre boat of the same size typically weighs more than 1500 kg.
Combining all these innovations in an all-new boat design allows Candela to optimize the benefit of each concept – something that cannot be accomplished by retrofitting an existing hull. Candela flying can be seen here.
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