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Electra Hydrofoil Ferry

Home » Blog » Electra Hydrofoil Ferry

xpeng x2
xpeng x2
December 21, 2022
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Categories
  • Mechanical
Tags
  • electra
  • ferry
  • hydrofoil
  • Mechanical
electra

1.Introduction

california-based startup boundary layer technologies has launched an electric hydrofoil ferry concept that promises twice the speed and range of existing electric ferries. called ‘electra’, the boat cruises at a speed of 40 knots and has a range of up to 100 nautical miles thanks to a podded propulsion system at the back and two lifting foils that reduce drag in the water.

2.History

the batteries that power electra have a capacity of 9000kWH and can be fully charged in less than three hours (based on a 2400kW charging system). boundary layer technologies says the battery-powered system significantly reduces cabin noise by up to 20db compared to conventional ferries. the 150 passenger ferry also promises a smooth ride even in choppy water.

not only better for the environment, electra’s electric system is lighter on the pocket too. the marine tech company estimates that the electra ferry offers reductions in operating expenses of up to 35% compared to fossil fuel burning fast ferry alternatives.

boundary layer technologies has already developed the hydrofoil and control systems required for electra, and plans to have the first vessels in operation by the first quarter of 2024 in regions such as the united states, scandinavia, and the mediterranean.

3.Advantages

  • Hydrofoils will decrease the motion index. Less porpoising means improved passenger ride and comfort.                                                                             
  • Foil boats are not as affected by rough water as regular hull pleasure craft, and the larger the foil, the better the ride.                                                               
  • Whether foils can improve your boat speed seems to depend on a number of factors, but according to tests foils still present drag so a properly trimmed regular boat will probably run a similar speed to foils. Most test references to speed with foils refer to more passengers moved per fuel unit.

4.Disadvantages

  • A strong power source is required, meaning more expensive engines.               
  • If the foils are fixed your boat draft is greatly increased. If the foils retract or fold they take up space in the boat, or make the boat wider.                                
  • For lakes with shallow water, hydrofoils are not practical at all.                                                          
  • Hydrofoil pleasure boats under 40 feet are not considered ocean capable vessels. As wave height increases, hydrofoils must ‘land’ and cruise on their standard hull.                                                                                                                      
  • Maintenance costs are high. Many commercial hydrofoil boats have been taken out of service due to the higher cost of operations and maintenance.                                                                                                                     
  • Because of the requirements for higher strength and added equipment, foil boats cost more. Too much so for the average pleasure boater.

5.Conclusion

The proprietary technology at the core of Electra is our high efficiency hydrofoil design. This reduces the drag of the vessel by half, allowing for increased range, ride quality and zero wake.

Source: designboom , wordlessTech , OFFSHORE ENERGY

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