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Electric boat goes airborne for cleaner ocean voyage

Electric C-8 boat near the Golden Gate bridge in San Francisco, California. — AFP
Electric C-8 boat near the Golden Gate bridge in San Francisco, California. — AFP
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Sausalito: Appearing at a glance to be just a simple pleasure boat floating on the San Francisco Bay, as the hydrofoil-equipped vessel picks up speed it suddenly begins rising above the water, grabbing the attention of passengers on a nearby ferry.


But instead of a roaring engine thrusting the boat along, its electric motor barely makes a sound.


Such electric boats with computer-guided hydrofoils may soon supplant conventional ferries with combustion engines in harbours and bays around the world, if Swedish "flying boat" maker Candela has its way.


"It's half plane and half boat; almost like riding a magic carpet," French sailor Tanguy de Lamotte said from the helm of the 8.5-metre (28-foot) long C8.


De Lamotte, who has completed the Vendee Globe solo round-the-world race in a sailboat twice as large as the C8, heads Candela's US arm.


The Swedish company's goal is to make the most energy-efficient electric boats "and get away from fossil fuels," according to de Lamotte.


Hydrofoils that act as underwater wings lift the boat as it accelerates, leaving only the rotor and hydrofoils immersed and greatly reducing friction.


In addition to using some 80 per cent less energy to travel, the boat also avoids nausea-causing waves or swells, de Lamotte said.


And since the engine is electric, passengers are spared the noise and smell of gas-powered motors.


While the project may seem like a drop in the ocean when it comes to countering climate change-inducing fossil fuel emissions, it is at least an oar stroke in the right direction, Lamotte contended.


Even if the C8 is a hit, their environmental benefit would be limited since recreational boats tend to be used only a couple of days a week and when weather is pleasant.


So Candela wants to tackle ferries. Their next model is a catamaran with 25 seats to be tested as a shuttle in the Stockholm archipelago later this year, he said.


The service is expected to cut in half the amount of time it takes people using ferries or buses to get from the Ekero suburb to the city centre once it gets going.


The company also plans to test its P8 craft -- a "limousine" version of the C8 -- between the airport and hotels in Venice, Italy.


For now, electric motors combined with hydrofoils are far from being viable in massive container ships or cruise ships.


And, the issue of producing batteries and recycling the materials remains a hindrance in the industry.


"The solution of our environmental problem is going to come with technology," de Lamotte told AFP aboard the C8. — AFP


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