DOCUMENT # 90021, REV4 MODEL 7000 GYRO OPERATION MANUAL-MAR09
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3
The Model 7000 Gyro System consists of the Gyro unit, Motor Drive Box, Gyro Control Box,
Cooling Loop Components, Keypad, Display, and Cables (AC and DC power cables and
CANbus cable not included).
Arrangement
The Gyro is a torque device and does not have to be installed in a specific hull 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. The Gyro Control Box must be mounted on a
transverse bulkhead, frame or subframe.
Installation Location
See dimension diagrams on previous page.
Mounting Dimensions
The installer 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 10310.
Loads
The Gyro bearings and Motor Drive Box are cooled by a closed glycol cooling loop that
incorporates a sea water heat exchanger. The installer is responsible for providing 8 lpm (2.1
gpm) raw water at ambient sea temperature and 6.9 Bar maximum pressure to the heat
exchanger. The ambient air temperature in the compartment in which the Gyro Control and
Motor Drive Boxes are mounted should not exceed 50
o
C.
Cooling
The installer is responsible for supplying 185-230 VAC, 50/60 Hz, single phase power on a 30A
service to the Motor Drive Box and either 12 VDC @ 20A or 24 VDC @ 10A service to the
Gyro Control Box. The DC supply voltage for the Gyro Control Box must be specified at order.
Electrical
A Keypad and small Display are provided to start, operate, monitor, and shutdown the Gyro.
Operator Controls
Gyro reduction of boat roll is a function of the boat’s displacement, transverse metacentric height
(GM
T
) 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
Performance
