Gyro Stabilization for Boats from 45 to 55 Feet
Smartgyro SG20 is the gyro stabilizer of choice for boats from 45 to 55 ft, or up to 25 tons. It delivers 5,900 Nms of angular momentum and up to 15,500 Nm of anti-rolling torque at its maximum rated speed of 9500 rpm. It is the smallest and fastest-spinning unit in the range, and the only one offered for 115 V as well as 220 V AC supply, with a 12 Vdc control input.
Serviced on board. Ideal for both new builds and refit installations, the SG20 can be fully serviced on board the vessel without the need to lift it out for maintenance, which Smartgyro says ensures significant time and cost savings. Its modular design means the unit can be serviced, maintained and assembled directly inside the boat.
Built around six technologies. A liquid cooling system dissipates heat from the motor and spinning bearings while also cooling the inverter and hydraulic manifold. A sealed vacuum flywheel enclosure minimizes air drag to increase performance and reduce heat and power consumption. The control module uses motion sensors and an Inertial Measuring Unit (IMU) to monitor and process real-time boat behavior. A pressurized, closed-loop braking system controls the gyro dynamically through hydraulic cylinders and a proportional valve. And for driving performance, the unit automatically locks the gyro’s counteracting forces during high-speed turns.
Power and installation. The SG20’s AC supply is 115 V or 220 V nominal, 50/60 Hz, single phase, with a 12 Vdc control input. It reaches stabilization, at 65% of rated speed, in 35 minutes, and full rated speed in 55 minutes. Smartgyro gives operating AC power of 1.5-2.5 kW, which depends on sea state and excludes the sea water pump, with a maximum of 3.5 kW during spool-up. The unit needs a sea water supply of 15-30 LPM / 4-8 GPM.
Backed by YANMAR. Smartgyro is part of YANMAR, and its worldwide distribution network is backed by YANMAR and its companies. Smartgyro recreational units carry three years or 2000 hours of warranty coverage, whichever occurs first. Ask Mastry about fitting the SG20 to your boat.
- For boats from 45 to 55 ft, or up to 25 tons
- 5,900 Nms angular momentum, 15,500 Nm anti-rolling torque
- Stabilization in 35 minutes from start-up
- Fully serviceable on board, no lift-out required
- Liquid cooling and a sealed vacuum flywheel enclosure
- 115 V or 220 V nominal AC, 12 Vdc control
- Weight 495 kg / 1091 lb







