In the early s, when Sir William Hamilton began experimenting with marine jets, he followed the lead of the most successful invention to date, the American Hanley Hydrojet. Using a round centrifugal water pump that drew in the water and expelled it through a steerable nozzle under the boat, he was able to achieve an encouraging but unspectacular speed of 11 mile per hour. Click here for Installation and Service Manuals for many of these older waterjet models. A slight modification to expel the jet stream above the waterline proved the turning point in marine jet propulsion, increasing speed to 17mph and eliminating all underwater appendages.
Waterjet propulsion was at last truly successful and the Hamilton Waterjet was born. A small direct drive centrifugal type of unit, the Rainbow gave a good performance in a suitable light craft, without the noise of a gearbox.
About were manufactured and marketed in New Zealand. A twin impeller axial-flowturbine, the Chinook was far more efficient with its straight-throughflow and two-stage pressure build up. Following this came the three-stage Chinook unit which increased performance further. This series was developed into a full range of one, two and three stage units driving a widerange of boats from river-runabouts to off-shore racing craft. Click here to reference parts drawings and manuals for Colorado Junior and Explorer jet units�.
The series of jet units evolved a standardised method of installation in hulls, regardless of the number of stages. This gave more cockpit space in the boat and employed modern controls and engines.
Preceded by the jet unit Colorado pump with intake and followed by series jet units. Split duct deflector developed for jets and then introduced on all Hamilton Waterjets. The split duct design increases astern thrust by directing the jet stream down and to the sides of the boat transom to avoid recycling and increase steering responsiveness.
HS Series waterjets, for knot craft, is introduced. These were multi-stage waterjet units designed for high-speed light commercial craft with power inputs up to 1,kW. Turbo impeller developed along with HJ model to replace the multi-stage unit in trailerable boats.
The Turbo impeller improves jet performance in aerated water conditions. Control Monitoring Unit CMU developed as a fully electronic jet and engine control system for larger waterjets. JT Steering system introduced. Nozzle design minimises thrust loss when steering to improve steering control and course-keeping efficiency. HJ waterjet unit supercedes HJ in model range. Primarily used on fast passenger ferries. Enter the MouseBoat � the first installment of next generation waterjet control devices from HamiltonJet.
Incredibly intuitive and simple to use, the MouseBoat ensure anyone can harness the full manoeuvring capabilities of waterjets. In July the company introduced our next evolution waterjet. This new HTX jet is the culmination of extensive research and rigorous testing, incorporating new hydrodynamics, and more refined materials to deliver a unit that offers more performance, durability and easier installation than ever before. A new AVX advanced control system was also released with full dual redundancy, IP67 rated and expandable design for medium to large vessels.
Waterjet History. HamiltonJet Waterjet History In the early s, when Sir William Hamilton began experimenting with marine jets, he followed the lead of the most successful invention to date, the American Hanley Hydrojet. Large diameter, single stage unit. These are four craft up to 30 metres long. Search form Search this site. Leave this field blank.
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