|
 |
|
Presents |
|
|
HJ-212 designed for 350 hp @ 4000-4500 rpm, gas engines, in trailerable boat for fresh water operation max. wt 3045 kg for single jet, 6090 kg for twins with manual bucket controls only. |
|
|
General Description The 212 waterjet is designed for a wide range of trailerable boats. Developed from the highly successful and proven 211 commercial jet, the 212 is a compact, high efficiency axial flow pumping unit which provides propulsive thrust from the reaction of the water jetstream. Mounted inboard at the stern, the jet draws water through an opening in the hull bottom, protected by a flush mounted screen. projecting through a sealed opening in the lower transom, the pumping unit discharges water aft through the outlet nozzle. Steering A trimmable JT type steering nozzle directs the jetstream to port or starboard for precise control. Control is via a push/pull cable system, but a manual hydraulic system may be installed as an option. Reverse A manually operated split duct astern deflector reverses the jetstream. The deflector locks in any position between full ahead and full astern. By working the steering and reverse controls in unison, a resultant thrust can be obtained in any direction for 360 degree thrusting ability, even a zero speed. Economy Since ahead, neutral, and astern control is achieved by merely vectoring the jetstream, the jet can be direct driven by a range of marine engines. As well as saving weight and cost of a gear-box, power loss through it is eliminated, improving performance and saving fuel. Compact Designed for close coupling of the engine nearer the transom, space within the boat is maximized. The steering/astern deflector arrangement reduces overhang beyond the transom. Simplicity As a single packaged module that replaces all individual components of conventional propulsion systems, engine alignment is simple and an inboard inspection hatch allows access to the interior of the jet. For routine servicing, the unit can be dismantled from outside the boat without disturbing the hull seal. SCOPE OF USE Typical craft parameters for single
jet installations 6-8 meters 2.5 - 3 tonnes 50Kw/tonne 20 - 26 feet 2.4 - 2.9 ton 70Hp/ton click on the drawing for a larger version of it.
|
| Please note that dimensions above are indicative only - refer to 212 designer's manual for complete technical data. Due to Hamilton Jet's policy of continuous development, all specifications are subject to change without notice or obligation. |
|
|
| While Hamilton Jet provides typical data for each of its jets, however they are subject to change without notice and are provided for comparison purposes only. Hamilton Jet is very interested in the success of your installation as is Jastram Technologies. For this reason anyone considering a jet purchase is encouraged to contact Jastram in the earliest planning stages to provide boat hull and engine information so Hamilton Jet can advise the best matches for impeller to engine, and jet to boat in your application and provide preliminary performance estimates. See the Application Questionnaire at the bottom of the first Hamilton Jet page if you wish to submit information on a particular boat for comments. |
Jastram Logo and page style
© Jastram Technologies Ltd.
Hamilton Jet Logo, graphics and
text © C. W. F. Hamilton Co. Ltd.
last updated
30th May 2005