Jet Control Systems
UltraJet Control Systems
Ultra Dynamics offers a wide range of standard jet control systems for the smooth and accurate control of the jet reversing and steering deflectors using single or twin levers or full-featured joystick control. We also offer mission-specific custom jet control systems. Our range of standard and custom control systems has grown significantly since first developed for military applications in the 1980’s.
The specification jet propulsion and controls from Ultra Dynamics permits single-source supply of an integrated propulsion system.
Control Overview
The following sections provide an overview of the controls, steering, and hydraulics systems available with UltraJet marine propulsion. Click on the links or images for more information on each system.
Hydromechanical (HM) Control
The Hydromechanical control provides proportional operation of the reversing deflector when actuated by a push/pull cable from the helm. The HM control converts low efforts at the helm to hydraulic actuation of the reverse deflector, even at full throttle. The HM control is available for the UltraJet models 251, 305, 305HT, 340, 377, and 410.
Click here for more details.
Electrohydraulic Jog (EHJ) Control
The Electrohydraulic Jog is a non-proportional control of reversing deflector(s) actuated a joystick or toggle at the helm to electrically actuate a solenoid-operated hydraulic valve on the jet. Hydraulic flow from this valve actuates the reversing deflector. The EHJ control is available on all UltraJet models but used mostly on the 251, 305, 305HT, and 340.
Electrohydraulic Proportional (EHK) Control
The economical Electrohydraulic Proportional control operates the reversing deflector proportional to helm lever movement. The EHK system is based on Kobelt single or twin-lever helm units, amplifier, and position feedback units. The EHK control is available for all UltraJet models.
JetMaster-Pro Proportional (JMP) Control
The JetMaster-Pro is a PLC-based control system to operate the reversing deflector(s) proportional to helm lever movement. The system is available with single or twin lever helm control for single or twin jets respectively. The JetMaster-Pro control is available for all UltraJet models.
JetMaster Joystick (JMJ) Controls
Ultra Dynamics, and predecessor Company Ultra Hydraulics, have been supplying joystick controls for vessels under 75 feet 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.
Jet Steering Systems
A variety of steering options are available for UltraJet units and for use with the above reversing controls. Steering options include steering position indicators, electronic synchronization for catamarans, and auto-steer (autopilot).
Hydraulic Systems
The above control systems are to precisely position the reversing deflectors with the deflectors being actuated hydraulically. A variety of pump and valve systems are available from Ultra Dynamics to operate the jet controls only and/or to operate additional functions such as a hydraulic bow thruster and anchor windlass.
