Ship water-jet drive HT900

HamiltonJet HT series waterjets represent the next evolution in waterjet propulsion technology Developed from the highly successful HamiltonJet HM waterjet range, HT series waterjets incorporate improved efficiency and cavitation performance to enhance the existing benefits of HamiltonJet’s superior propulsion systems. General Information HT series waterjets feature a mixed flow pump with a greater nozzle to inlet ratio than comparible size axial flow waterjets. This provides high efficiency over the entire vessel speed range. A new optimised compact astern deflector retains the performance of HM series type ducts but with reduced weight and width for installation in narrow hulls. The deflector is actuated by two fully inboard hydraulic cylinders. HT waterjet models are fitted with the class leading JT nozzle steering system, also actuated by two fully inboard hydraulic cylinders. Shafts for both steering and astern deflectors are protected from wear and marine growth through the use of sealed rubber bellows on external shaft surfaces. Installation of HT series waterjets has been simplified by the use of a compression seal type transom plate arrangement, which allows for an increased tolerance for transom axial alignment. The transition duct extends from the flat surface aft of the intake opening to an area forward of the front intake screen mount (HT900 & HT1000 only). For an aluminium hull, the transition duct casting is surrounded by a section of 5083 aluminium plate so the shipyard does not need to carry out plate-tocasting welds.