Page 210 - Vetus

STABILIZERS (HYDRAULIC)

Motor yachts over 10 metre length are frequently used on open waters. VETUS stabilizers are the ideal solution for dramatically
reducing the rolling movement of these vessels in bad weather or in heavy swells.
Stabilizers consist of a hydraulically actuated pair of fins that are fitted to a
vessel’s port and starboard midships sections underwater.
They are controlled by an on board gyroscope and automatically react to
the rolling movement of the vessel to create a damping effect. In other words,
rolling motion is reduced considerably by the use of VETUS stabilizers,
resulting in increased comfort and reduced risk of seasickness.

Stabilizers can to some extent, be compared with an aircraft’s ailerons,
which considerably reduces movement in bad weather.

Valve block How do they work?
The stock for each stabilizer fin is controlled by a set of hydraulic cylinders. These hydraulic cylinders
are operated by the on board hydraulic system, powered by the main engine(s) or generator set.
A gyroscope detects vessel movement and electronics and a valve block control oil flow to the
cylinders, generating a movement in the fins to counter the roll. The valve block contains a solenoid
valve controlling the direction of the fins, a centering valve for when going astern and an oil
pressure control unit.
Hydraulic hoses connect the hydraulic pump, the valve block and the hydraulic cylinders. If there is
no hydraulic system already on board, then VETUS can also supply the components for this.

1. Stainless steel tank with oil cooler
2. Connection for secondary drive
3. Hydraulic pump
4. Valve block
5. Stabilizer cylinders
6. Stabilizer fin
7. Oil cooler

3 Possibilities STABILISERS STAND ALONE SYSTEM WITH SMALL GEAR PUMP AND SMALL
HYDRAULIC TANK
1. A boat equipped with a VETUS hydraulic installation
(stabilisers can always be added)
2. A boat equipped with a hydraulic installation not supplied by
VETUS (it is always possible to add stabilizers with a custom
made modification, please consult VETUS).
3. A boat without a hydraulic installation; use a stand-alone
system. FIN SIZES:
0.3 M - 0.4 M - 0.5 M
0.6 M - 0.7 M
GEAR PUMP 11 CC, SAE A
9 OR 11 SPLINE SHAFT

HT301132
HT1029
HT1028S
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