JET-PROPELLED BOAT

摘要

To enable changing of course when a jet stream from a jet pump has stopped or is low. A nozzle 30 of a jet pump 20 is constructed so as to be rotatable, and a rudder 32 that does not project downwards further than a boat bottom 11a is provided at the nozzle 30. A rudder channel 18 for guiding water flow W to the rudder 32 is provided separately from a jet pump channel 24. It is preferable for the rudder 32 to be duct-shaped and it is preferable for the rudder channel 18 to be formed of a watercourse plate with an end at the front with respect to a direction of travel opening away from the boat body when driving of the jet pump 20 is halted or when the rotational speed of driving of the jet pump is a prescribed value or less.