Patent ID: 7430966

Claim:
A roller coaster installation comprising a guide track comprising rails, at least one vehicle guided on said rails, the vehicle comprising a frame and an undercarriage for guiding the vehicle on the rails, the roller coaster installation further comprising at least one stretch of water arranged under or alongside a portion of the guide track, the said vehicle being provided with at least one hydrodynamic brake, wherein said hydrodynamic brake comprises deflector means and spacing and fixing means for fixing said deflector means to the vehicle, said deflector means comprising a fin being arranged so as to penetrate water in the said stretch of water when the vehicle passes through the said portion of the guide track and so as to raise a water spray, and wherein said stretch of water and said guide track are arranged in a way that the rails and the vehicle, including the frame and the undercarriage, remain out of the water when the vehicle passes through said portion of the guide track.