this is a clickable image home introduction model pneumatic or hydraulic air activated stabilizers references contacts quotation


                                  Model Of A Two-Fin System



Activated Fin Stabilizers
Since the invention of the activated fin stabilizer in the early 1920's all stabilizer systems have been operated hydraulically, hydroelectri cally or hydroelectronically, as these were the available technolo gies. In the past few years, the more advanced pneumatic technology has emerged and proven its superiority in various application fields. The Gyro-Gale system is a classic application of the advanced pneu matic technology in the stabilizers field.

Principles Of Operation
Generally, a rate gyro is continuously activating and positioning two (or more) aerofoil shaped fins, which project from the sides of the vessel, so that one fin develops upward lift while the other develops downward lift. Thus, the combination produces the required stabiliz ing torque, which counteracts the rolling force induced by the wave action. Consequently, the performance of the stabilizers is entirely dependent upon applying the correct amount of righting torque at precisely the right moment.

In other words, an efficient system should feature a variable inci dence fin which is capable of adjusting its angle of attack to the water . in proportion to the speed of the vessel, to produce the correct amount of lift through the full range of speed. In addition, the system should offer a control unit and working medium which permit the activation of the fin simultaneous to the response of the gyro.

Gyro-Gale Pneumatic stabilizers
Gyro-Gale is a pneumatic controlled and operated system, thus pro viding comfortable, smooth, quiet and reliable air-cushioned stabili zation. The system comprises the latest advanced pneumatic equip ment and devices, most of which are standard industrial items. These components, when interconnected, provide the simplest, yet most advanced and efficient stabilizing system. It stops the roll almost before it starts.

Gyro-Gale Features Installation
No requirement for electric connections.
No requirement for hull strengthening at fin locations.
No requirement for through-hull stuffing box or gland     seal.
Light weight equipment, totaling 272 lbs. for the two      fins system, thus reducing installation time (40 man      hours) and cost.

Operation
Simple "on-of" pneumatic switch for operation.
No adjustment required for various sea conditions.
Water-lubricated fin bearing for smooth and quiet      operation. Performance
Variable incidence fin, self-adjustable for various      vessel's speeds, obtained by pneumatically balancing      the hydrodynamic water pressure on the fin, thus      providing maximum stabilization (up to 90%) through      the entire range of speed (4 to 50 knots).
Control unit with one moving part, yielding nearly      simultaneous (0.23 sec.) relay of gyro response to the      fin activating mechanism.
Frictionless air as working medium, for fast response    and added comfort through air-cushioned stabilization.
Anticipation of roll and instant reaction to it, within 3 o
Minimizes pitching motion (Quadra Fins only).
Various fin configurations for optimum performance      with various hulls.

Maintenance
Fully automatic self-cleaning and lubricating, just add      lubricating mineral oil every 250 hours of operation.
Working medium air, never needs refill.
Easily repairable interconnecting nylon tubing.

Safety
Breakaway fin bearing to shear off from the hull under      heavy impact, thus leaving the hull intact.
Operation on low air pressure ( l00 psi) in the event of      damaged connector, only clean air escapes, as      opposed to the highly pressurized flammable fluid used      in hydraulic systems.