User:Mikaelmahlberg/sandbox

Candela Speed Boat AB


Candela Speedboat is a Swedish tech company and electric boat builder, situated in Lidingö, Sweden. Candela was founded in 2015 by Gustav Hasselskog with the mission to build the first electric boat with enough range and speed to compete with fossil fuel powerboats. After almost five years of R&D, the company launched Candela Seven, the world's first foiling, electric speedboat in July 2019. It is being serially produced in the company's factory in Gåshaga, Lidingö. As of March 2020, 13 boats have been sold worldwide. Thanks to having both long range and high speed as well as other features not found in normal boats, Candela has been dubbed "The Tesla of the Seas" by multiple publications and news outlets.

Candela Seven
Candela Seven is the world's first electric foiling boat.

By using hydrofoils, Candela Seven flies above the water's surface at speeds up to 30 knots. A hydrofoil is a lifting surface, or foil, that operates in water. They are similar in appearance and purpose to aerofoils used by aeroplanes. As Candela Seven reaches 17 knots, the fully submerged hydrofoils lift the Seven's hull out of the water, decreasing drag by 50 percent compared to a planing hull of the same size. The low drag combined with an electric drive train makes Candela Seven very efficient. In 23 knots, the electric motor only uses 18-20 kW. The range is 50 nautical miles in 23 knots. The foils can be fully retracted when cruising in shallow waters or docking.

Control system
Candela Seven has two ultrasonic sensors that measure the wave height in front of the boat 100 times per second. This information is relayed to the flight controller, which automatically adjust the angle of attack of the foils, in order to stabilize the inherently unstable boat. This fly-by-wire system is similar to the flight controller in a fighter jet or any other modern airplane. The result is a smoother ride compared to planing boats. Also, Seven is easy to drive since there is no need for trimming the engine or using trim tabs.

Specifications

 * Length 7,7 meter
 * Beam 2,4 meter
 * Weight 1200 kilo
 * Cargo 6 persons
 * Motor 70 kW for takeoff, 20 for crusing at 23 knots
 * Battery 40 kWh lithium-ion

Performance

 * Top speed 30 knots
 * Crusing speed 23 knots
 * Range 50 nautical miles in 23 knots