MJP UltraJet waterjet models (100 - 1500 kW) feature:
Complete the questionnaire to determine the right jet for your application.
The MJP Aqua Jets are suited to high-speed vessels operating in the 20 to 50 knot range. MJP also offers models optimized for displacement and semi-displacement craft.
The MJP-UltraJet Hydro mechanical and Electrohydraulic control systems offers complete control of vessel maneuvering by controlling steering, reversing, side movements, rotation or crash stop. The four primary MJP UltraJet control systems cover a wide range of application requirements.
The Hydro mechanical reversing control provides proportional operation of the reversing deflector (bucket) when actuated by a push/pull cable from the helm. The HM control converts minimal effort at the helm to hydraulic actuation of the reverse deflector, even at full throttle. The HM control is available for the MJP UltraJet models 251, 251HT, 305, 305HT, 340, 340HT, 377, and 410.
The economical Electrohydraulic Proportional Control operates the reversing deflector proportionally to helm lever movement. The EHK system is utilizes components from Kobelt's durable ship rudder control. The reversing deflectors are actuated at the helm with single or twin-lever helm units.
The economical Electrohydraulic Proportional control operates the reversing deflector proportional to helm lever movement. The EHK system is utilizes components from Kobelt's durable ship rudder control. The reversing deflectors are actuated at the helm with single or twin-lever helm units.
Ultra Dynamics, formerly Ultra Hydraulics, have supplied joystick controls for vessels since 1995. These Ultra-developed joystick systems are used to accurately control forward, reverse and neutral positioning of the boat using vectored thrust from the jet drive(s). The JetMaster Joystick controls are available for all UltraJet models. The control system provides excellent maneuverability in all directions including rotation around boat center and sideways movement for docking.
The JM Wind farm Boat control system has been developed for the unique operating requirements of wind farm service boats.
While many water jets look similar, each brand and model has different operating functionality. Water jet attributes are best matched to the hull design, and application requirements.
The following documents provide more information about the range of water jets available to support application specification.
This PDF document provides a systemic approach for successful application of marine waterjet propulsion. Similar to other propulsion methods, a successful waterjet-propelled boat requires the operation of four elements in union; Mission, Hull, Power Source, and Propulsion (water jet). This document explores design and operation considerations for each element based on our experience, the experience of various boat builders and jet manufacturers, technical papers, and other sources.
Often, the specification of a waterjet-propelled boat is based only on maximum speed at full throttle in calm water. However, engine manufacturers need their engines to run at less than full throttle; boats become heavier in service, and the boats need to operate in less than ideal sea and wind conditions. Jet selection should always incorporate boat performance at cruise throttle in less than ideal conditions.
Nacelles have been applied by a number of boat builders to optimize hulls for water jet propulsion in single and twin-jet monohulls and catamarans. The nacelle concept is especially useful to adapt hulls not normally considered suitable for waterjet propulsion.
Step-by-step photo description on the preparation and installation of UltraJet propulsion in aluminum hulls with single or twin UltraJet units.
Step-by-step photo description on the preparation and installation of UltraJet propulsion in composite hulls with single or twin UltraJet units.
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