SPERRY GYROFIN

Ships equipped with the Sperry Marine GYROFIN Stabilisers reduce ship roll by up to 90 percent.

Sperry Marine introduces the next generation of ship roll stabilizers that feature a new digital control system, the "Lift Control" design and upgraded machinery units. Sperry Marine's "Lift Control" produces maximum fin efficiency not available from any other stabiliser system.

The Sperry Marine GYROFIN ship roll stabilizer is a proven design to maximum performance and reliability. The latest advances in technology have been applied to this design to provide a ship roll stabilizer system that truly delivers ship comfort and safety even in the roughest seas.

Features

• Proven design to maximum performance and reliability
• Innovative "Lift Control" feature that enhances stabilisation efficiency and machinery service life
• Combined with lift control the fin unit, utilising a tail flap, improves the lift to drag ratio thereby, minimising drag and saving fuel
• New Digital Control System with serial connectivity and simple to use touch screen controls
• Upgraded machinery elements to enhance performance and supportability
• Dedicated Project Management Team that provides an array of support services from technical consulting to commissioning

 
How Lift Control Works

"Lift Control," a key feature of SperryMarine's innovative and patented finstabilisation system, is made possible bymounting displacement transducers withinthe fin shaft. The transducers produce anelectrica

l signal proportional to the lift forcegenerated by the angle of attack of the fin tolocal water stream direction. This lift signalis compared with the instantaneous value oflift required for roll stabilisation. Thedifference is used to drive each fin until itachieves the desired lift, therebyautomatically compensating for variationson the local water stream direction. Theangle of the fin will change as needed untilthe desired lift is being achieved even thoughthe local water stream direction iscontinuously changing.

"Lift Control" prevents the fin from beingdriven at times into the Cavitation Zone andat other times from producing a shortfall inlift. The lift forces required for stabilisationare more faithfully produced, giving animproved stabilisation efficiency.

Lift Control Advantages

Stabiliser systems using "Lift Control" produce thedemanded peak lifts when required without operating inthe cavitation region.

Stabiliser systems without "Lift Control" cannot maintainthe required peak lifts because of the fluctuatingconditions within the cavitation region.

Sperry Marine's "Lift Control" produces maximum finefficiency not available from any other stabiliser system.

New Digital Control System

• New Bridge Control Unit offers large colour LCD displays, versatile, easy-to-use touchscreen controls for operator interface
• Serial data communication between the units enhances system performance and reduces cabling requirements
• Electronics allow operating up to 4 fin stabilisers simultaneously
• Improved system reliability by the use of a new Roll Motion Sensor with no moving parts, Proximity Sensors inplace of mechanical switches
• Redundant operator interfaces at both the Bridge Control and Main Control Units - If a failure of the Bridge Control Unit occurs, the fin stabiliser can be maintained by the Main Control Unit
• System diagnostic capabilities with intelligent alarm messaging
• A unique "Quick Test" feature that performs a comprehensive test of the entire system from the Bridge Control
• Panel Each fin unit has an auxiliary pump and motor set which can stow the fin in the event of an emergency via the ship's emergency electrical supply incompliance with the SOLAS requirements for passenger vessels
• Emergency stowing of the fins is controlled from the standard control stations or it can iniated automatically
  

Typical Gyrofin Installation