The Gyro-Gale Stabilizers System
The Gyro-Gale Stabilizers system compromises of the following items:
- – Air tank
- – Filter/regulator/lubricator unit
- – Control unit
- – Fins and driving mechanism
- – Bridge control
A. Air Tank
The air tank acts as an expansion tank to control air supply from the compressor, in spite of fluctuating demand on the system. The tank is fitted with the following items:
- Drain cock
- ON/OFF remote valve
- Pressure gauge
- Air lnlet fitting
B. Filter/Lubricator Unit
The unit consists of a micro-filter (0.02 micron) with automatic water ejector and a micro-fog oil lubricator. The lubricator injects oil in the stream of air in the form of a mist of microscopic oil droplets**. This ensures that all internal parts and operating mechanism are adequately lubricated.
** Gyro-Gale Stabilizers uses basic mineral oil for lubrication that can be purchased from your local pharmacy/drug store.
C. Control Unit
The control unit senses the rolling motion of the vessel and converts it into a pneumatic power, which positions the fins at the right angles. The control unit comprises the following:
- – Gyroscope (Mechanical or Electronic)
- – Rotary valve
- – Amplifiers
- – Distribution block
- – Gyro pressure control
Gyro-Gale Stabilizers offers several Mechanical and Electronic Gyros to choose from.
a. Mechanical Gyro
The Mechanical Gyro wheel rotates about a beam axis. Its supporting gimbal pivots about an upright axis and is centered by a pair of springs. A constant velocity air jet is applied to the serration in the rim of the gyro wheel, which causes it to rotate at a constant speed. Any movement of the vessel about the roll axis will cause a corresponding precession of the gyro.
b. Electronic Gyro
Installed at the helm, the Electronic Gyro gives the owner or captain more control over the vessel than ever before. This gyro is highly sensitive to the slightest motions, and will automatically correct roll and list, and will trim the vessel.
2. Rotary Valve
The Rotary Valve is mechanically coupled to the gyro and converts the mechanical deflection of the gyro into a pneumatic signal equivalent to the magnitude of the deflection of the gyro. The rotary valve is constantly supplied with 100 psi air pressure. When the gyro is in its central position, the outputs from the rotary valve should be equal. As the gyro moves to either direction, the linkage transmits the movement to the rotary valve and causes its spindle to rotate. Thus, increasing the pressure output on one side and reducing the output on the other side.
The Amplifiers allow a large amount of air, at the prescribed pressure dictated by the rotary valve, to pass through to the driving mechanism, thus, causing the fin to be activated. A pressure gauge is mounted on the amplifier to indicate the pressure going through.
4. Distribution Block
The purpose of the Distribution Block is to distribute the incoming air from the reservoir to the various parts of the control unit. It also distributes the output from the amplifiers to the fin’s driving mechanism.
5. Gyro Pressure Regulator
The Gyro Pressure Regulator controls the pressure of the air supply to the gyro wheel and is used to control the gyro?s rotation speed and consequently determines the sensitivity of the system.
D. Fins & Driving Mechanism
The Stabilizing Fins provide the torque necessary to oppose the sea waves tending to roll the vessel. The fins are deflected by pneumatic cylinders operated by the pressure from the amplifiers in the control unit. Each fin unit comprises the following parts:
- – Fin
- – Base
- – Operating pneumatic cylinders
Gyro-Gale Stabilizers offers three types of fins:
- – Cruiser-Fins
- – Ultra-High-Speed Fins
- – Tab-Fins
Our Fins are a symmetrical hydrofoil based on NASA design to minimize drag and stress on the hull. Gyro-Gale Stabilizers? fins are composed of an epoxy skin over a rigid stainless steel frame. The interior of the fin is filled with light weight closed cell foam which gives the fin a remarkable strength/weight ratio. Making our fins strong, yet light weight for increased buoyancy. The Cruiser-Fin and Ultra-High-Speed Fin are designed to incline up to 22.5 degrees in either direction.
Our Tab-Fin is made of the same quality with the addition of the stainless steel tab at the trailing edge of the fin. The Tab-Fin is designed to incline up to 22.5 degrees in either direction.
When the air pressure is applied to the pistons which deflect the fin, the fin deflects until the water forces acting on it are balanced by the piston forces. This arrangement of balancing the sea forces against the force that deflect the fin insures that the lift produced by the fin remains almost constant over a wide range of operational speeds. This means that it is not necessary with Gyro-Gale Stabilizers to provide a control to reduce fin angles at high speeds (self-adjustable variable incidence fin). Without fin angle/speed compensation the efficiency of the conventional stabilizers would be considerably reduced at speeds below cruising speed and there would be a danger of overstressing the fin shaft at high speed. This is not the case with Gyro-Gale Stabilizers, our stabilizers designed for fin angle/speed compensation.
E. Bridge Control
This is simply an ON/OFF pneumatic switch together with two gauges to monitor the air pressure on the driving mechanism. When the switch is turned to the ON position, the remote valve mounted on the air tank would open to allow the air to flow through the control unit. The two gauges are connected in parallel to the gauges on the amplifiers of the control unit and therefore allow the user to monitor the pressure in the amplifiers from the helm or bridge.