Express Joystick System

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Express Joystick System
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Express Joystick System

• Twin Disc developed the EJS in response to the
  market demand for improved maneuverability and
  handling of yachts.
• With the introduction of the POD propulsion
  systems and the accompanying joysticks, more
  owners feel comfortable operating large yachts
  without licensed captains
• The EJS provides slow speed control of
  traditional shaft/propeller vessels with
  performance exceeding any POD controlled vessel

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EJS Overview

• Twin Disc incorporates all propulsion components
  into the control of a single joystick to allow
  optimum maneuverability

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EJS Requirements

• To incorporate EJS into a boat specification,
  the following propulsion components are required
• Electronically governed engines
• Twin Disc QuickShift Marine Transmission
• Twin Disc EC300 Power Commander
• Hydraulic Bow Thruster (with proportional
  control)
• Hydraulic Stern Thruster is Optional (with
  proportional control)

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M EJS sys
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EJS Operation

• The EJS was designed to be very intuitive for
  the vessel operator
• Twisting the joystick will result in rotation of
  the vessel on its center point
• Moving the joystick in any direction will propel
  the boat in the direction while maintaining its
  heading
• The amount of directional movement of the
  joystick is proportional to the thrust delivered
  by the propulsion system (e.g. moving the
  joystick hard to the right will provide greater
  thrust than just nudging it to the right

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• EJS Station Select Button actions related to
  Tuning
• Four seconds on EJS button will initiate the
  tuning process
• IF
• EJS-MFST is active and set to the tuning window

• Double button push will suspend the tuning any
  time
• Single button push with joystick off center will
  save adjustment
• Single button push with joystick at center will
  move to next point
• EC300 station select button press will also
  suspend the
• tuning process for safe management of the
  boat
• NOTE To resume tuning from a suspension, press
  and release
• the EJS station select button and
  wait for the prompt on
• the MFST laptop screen

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EJS Technology

• The EJS system provides the fastest response
  and vessel control due to the QuickShift
  technology
• QuickShift clutches transmit torque in 50
  milliseconds compared to 1-2 seconds via standard
  clutch technology
• Dual clutch piston allows for slow speed control
  of propeller gt down to 30 rpm

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EJS Summary

• The EJS provides shipyards and operators easy,
  and complete joystick control of vessels with
  standard shaftline installations.
• No other propulsion system can match the
  smoothness and immediate response of the
  QuickShift clutch technology

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Bulletin
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POWER MOTORYACHTJanuary 2010 Edition