Thruster Systems

Quick Thruster Systems range. Part of the Quick brand at Hudson Marine Electronics.
QSY Thrusters
QSY Thrusters
DC Thrusters
DC Thrusters
AC Thrusters
AC Thrusters
DC-AC Thrusters
DC-AC Thrusters
Hydraulic Thrusters
Hydraulic Thrusters
QSY Retractable Thrusters
QSY Retractable Thrusters
Retractable Thrusters
Retractable Thrusters
Hydro Retractable Thrusters
Hydro Retractable Thrusters
Flange
Flange
Remote Controls
Remote Controls
Thruster Radio Remote Control
Thruster Radio Remote Control
Thruster Proportional Controls
Thruster Proportional Controls
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Specifying a thruster for the boat, not just the tunnel

Thruster sizing starts with waterline length, displacement and windage rather than the tunnel diameter alone, since a tunnel that fits the bow does not automatically mean the motor behind it is powerful enough to hold the bow against a crosswind at the marina. Voltage (12V or 24V) generally follows whatever the rest of the boat's electrical system already runs on, since running a separate battery bank purely for the thruster is rarely worthwhile.

Control ranges from simple on-off toggle operation through to proportional control, which varies thrust with how far the joystick or button is pushed rather than giving full power immediately; proportional control makes fine positioning alongside a berth noticeably easier in a crosswind.

Installation also needs to account for battery placement close to the thruster motor to keep cable runs and voltage drop down, and a tunnel that is correctly finished and faired, since a rough tunnel exit measurably affects thrust efficiency.