| Rated RPM |
10,000 RPM |
| Angular Momentum at Rated RPM |
7,000 N-M-S |
| Anti-Rolling Torque at Rated RPM |
15,000 N-M |
| Spool-up Time to Rated RPM |
45 Minutes |
| Spool-up Time to Stabilization (70% Rated RPM) |
25 Minutes |
Spool-up Power
AC Motor
DC Control
|
3000 Watts
240 Watts |
Operating Power
AC Motor (sea state dependent)
DC Control
|
1500-2000 Watts
240 Watts |
| AC Input Voltage |
185-230 VAC, 50/60 Hz, Single Phase |
| DC Input Voltage |
12 VDC @ 20 Amps or 24 VDC @ 10 Amps |
| Ambient Sea Water Supply to Gyro Heat Exchanger |
8 liters/min (2.1 gal/min) |
| Maximum Ambient Air Temperature |
50 Deg C (122 Deg F) |
| Weight |
455 Kg (1000 Lbs) |
| Envelope Dimensions |
| Gyro |
797 length × 982 wide × 671 deep – mm
31.4 length × 38.7 wide × 26.4 deep -- in |
| Control Junction Box |
312 high × 403 wide × 142 deep – mm
12.3 high × 15.9 wide × 5.6 deep -- in |
| Motor Drive Junction Box |
600 high × 380 wide × 207 deep – mm
23.7 high × 15.0 wide × 8.2 deep -- in |
Arrangement
The Model 7000 Gyro System consists of the Gyro unit (pictured) and the following accessories that are shipped loose: Keypad, Display, Motor Drive Box, Control Box, Cooling Loop Components, and Cables (except AC and DC power cables and CANbus interconnect cable which must be furnished by the boat builder or yard).
Installation Location
The Gyro is a torque device and therefore does not have to be installed at a specific forward or aft location or on the centerline. However, the Gyro should not be installed at forward locations in a high speed boat where the vertical accelerations exceed ±1 G (0 to 2G range). The Control Box must be mounted on a transverse bulkhead, frame or subframe.
Mounting Dimensions
Envelope and mounting dimensions for the Gyro are shown on Seakeeper Drawing 90002. Mounting dimensions for the Motor Drive Box and Control Box are shown on Seakeeper Drawings 90007 and 90005 respectively.
Loads
The boat builder or yard is responsible for designing the foundation to which the Gyro’s saddle beams are attached and for ensuring that this foundation can safely transfer the concentrated Gyro loads from the saddle beams to the adjacent hull structure. Loads that the Gyro imposes on the saddle beams are explained on Seakeeper Drawing 90002.
Cooling
The Gyro bearings and Motor Drive Box are cooled by a closed glycol cooling loop that incorporates a sea water heat exchanger. The builder is responsible for providing 8 lpm raw water at ambient sea temperature and 6.9 Bar maximum pressure to this heat exchanger. The ambient air temperature in the compartment in which the Gyro and Motor Drive Box are mounted should not exceed 50 C.
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Electrical
The builder is responsible for supplying 185-230 VAC, 50/60 Hz, single phase power on a 20 Amp service to the Motor Drive Box and either 12 VDC @ 20 Amp or 24 VDC @ 10 Amp service to the Control Box. The input voltage for the Control Box must be specified at order.
Operator Controls
A Keypad and small Display are provided to start, operate, monitor and shutdown the Gyro.
Performance
Gyro reduction of boat roll is a function of the boat’s displacement, transverse metacentric height (GMT) and hull damping as well as the operating conditions (speed and heading with respect to waves) and sea state. The Gyro controller regulates the active hydraulic brake to ensure the Gyro’s anti-roll torque is maximized irrespective of hull characteristics or operating conditions. In heavy seas, the Gyro rpm may droop when the required power exceeds 2000 watts – this is normal and is designed to limit large power demands at the expense of a small loss of performance.
Alarm and Monitoring
Sensors, alarms and shutdowns are provided to allow unattended operation. Sensors measure flywheel bearing temperatures, motor and drive temperatures, vacuum pressure, gimbal angle, brake pressure, and ship motion. The Gyro controller sends sensor values and alarm information to the display and also locks the brake and shuts down the motor drive in the event of a fault or alarm condition Gyro operating history during faults or alarms is recorded in the controller’s memory for subsequent recall by a qualified service person if needed.
Safety
The brake automatically locks the Gyro so it cannot generate excessive anti-rolling torque loads in the event of a system fault or alarm, loss of electrical power or loss of brake pressure. The brake can also be locked from the Keypad or by shutting off power locally at the Motor Drive Box or Control Box.
+ Download detailed drawings here
+ Download product brochure here
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* Seakeeper Reserves the Right to Modify These Specifications and Information on the Referenced Drawings *
