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fustakrakich writes with news that a boat powered only by its sails has reached speeds of 100km/h for the first time. The team also claims to have reached 109km/h over a 500m course. The craft took the speed record back from kite surfers, who have somewhat smaller sails but a massive weight advantage over boats. "Sailrocket 2 set the record last week, and the speed 54.08 knots (100.1 km/h) the craft achieved has been recognized by the World Sailing Speed Record Council as the new mark in Class B for vessels traversing a 500 meter course. The speed is higher than any other vessel recorded in the Council’s lists and is the only recorded speed over 100 km/h." Gizmag has a more detailed article about Sailrocket 2's exploits, and says in an update that the craft achieved speeds of 121km/h today (65.37 knots).