초록 ▼

A trim tab is provided in the internal portion of a nozzle of a jet propulsion system. The trim tab can be rotating about an axis to expose a surface of the trim tab to the jet stream of water passing through the nozzles of the jet propulsion system. The exposure of one of the trim tab surfaces crea

A trim tab is provided in the internal portion of a nozzle of a jet propulsion system. The trim tab can be rotating about an axis to expose a surface of the trim tab to the jet stream of water passing through the nozzles of the jet propulsion system. The exposure of one of the trim tab surfaces creates a thrust vector in either the port or starboard direction which creates a corrective thrust, in a desired direction, which overcomes any manufacturing misalignments.

대표청구항 ▼

[ I claim:] [1.] A jet propulsion system for a watercraft, comprising:a first nozzle through which water is ejected by an impeller, said first nozzle being generally cylindrical and disposed about a horizontal axis;a second nozzle which is rotatable about a vertical axis through a range of angles re

[ I claim:] [1.] A jet propulsion system for a watercraft, comprising:a first nozzle through which water is ejected by an impeller, said first nozzle being generally cylindrical and disposed about a horizontal axis;a second nozzle which is rotatable about a vertical axis through a range of angles relative to said first nozzle; andan adjustable trim tab attached to a preselected one of said first and second nozzles, said trim tab having at least one surface which is disposable in a nonparallel association with said second nozzle, said adjustable trim tab being rigidly attached to an internal surface of said preselected one of said first and second nozzles during operation of said watercraft and being rotatable relative to said preselected one of said first and second nozzles during adjustment of said adjustable trim tab.