Wind Driven Generators

STARDATE 13071999. A brace of ENERCON 500 KW turbines on the ridge behind Salmon Beach. Esperance Western Australia. The first wind farms in Australia were established in 1984 by the State Energy Commission ( S.E.C.W.A ) The premier renewable energy state.

Wind power is actually kinetic energy, transformed from the planets rotation, interacting with solar energy / uneven heating of the planets surface and atmosphere . The wind hurtles across the Southern ocean, in front of me, at an average of 7.5 metres per second ( which is a lot ) and is compressed by the treeless terrain into “Laminar Flow”, before striking the blades. Laminar Flow is the best fuel for wind turbines; fast, smooth, unbroken air, Devoid of eddy currents and turbulence.

Chris Darker Designer of the Esperance wind farm

Wind Giro 600W

WIND GYRO originates from Switzerland and is the genius of a Dr Piet Berker’s a famed watch and clock maker, and master of rotational dynamics. The wind velocities atop Swiss mountain ranges are some of the highest on earth and so his design is capable of withstanding the highest wind speed of any commercially available machine, 65 Metres per second.

The WIND GYRO is a “compound turbine”, the centre Savonius rotor being the starter rotor and air brake, whilst the outer Darrieus wing rotor provides the main drive thrust once the lift of the aerofoils cuts in. The Wind Gyro is a Vertical Axis Wind Turbine (V.A.W.T), as opposed to a Horizontal Axis Wind Turbine (H.A.W.T).  The advantage of V.A.W.T is its simplicity of design and overall durability as there are no conflicting forces and stresses, or slip rings to extract the electric current from the turbine alternator down to ground level.

The unit shown above is the WIND GYRO 600, which has an electrical power output of 600 watts @ a wind velocity of 12  M/S.  (Metres per Second) This machine is perfect for use with a solar array to provide essential electricity to a small to medium sized residence and will greatly extend the lifespan of a battery energy storage system by delivering a more seamless power supply and limiting overnight battery discharge.

Here are the specifications of the WIND GYRO 600, which as a matter of fact is the most popular model in the range due to its manageable size and scale and useful power output of around 3000 - 6000 watt-hours average daily depending on location and mounting.  If you have an interest in wind power then this is the perfect sized unit to become involved.

The machine is smooth and quiet in its operation and suitable for rural and suburban locales as it is less affected by wind shadows from buildings and trees than the Horizontal Axis propellor type turbines, and less likely to injure bird life. It is also most fascinating in its operation and many folk consider it to be extremely artistic in its form and a delight to watch, especially as it is generating electricity.

  • Rotor height    1320 mm
  • Rotor diameter       1540 mm
  • Rotor material        Anodised Aircraft Alloy.
  • Total turbine mass   50 kg
  • Start to spin          1 metres per second.
  • Start to generate     2 metres per second.
  • Rated output          12 metres per second.
  • Automatic brake      15 metres per second.
  • Survival wind speed  65 metres per second.
  • Battery charging      24 OR 48 volts.
(must be specified at time of order)

" Talkin bout my generation " ! WIND GYRO 400 watt V.A.W.T.

" Talkin bout my generation " !  WIND GYRO 400 watt V.A.W.T.

Darrius and Savonious

GYRO WIND 400 blades.

GYRO WIND V.A.W.T's are "compound" turbines. The centre SAVONIOUS rotor is the starter rotor and air brake . The outer DARRIEUS blades, with their aerodynamic wing profile is the main drive.
Vertical Axis TurbineWattsVolts Start spinStart GenRated SpeedHeight mmWidth mmWeight KgList+GST
Vertical Axis TurbineWattsVolts Start spinStart GenRated SpeedHeight mmWidth mmWeight KgList+GST
Wind Gyro 400 40012/243.6Km/h9Km/h43km/h1200106029$2000.00
Wind Gyro 600 60012/243.6Km/h9Km/h43km/h1320132040$3500.00
Wind Gyro 1000 100024/483.6Km/h10.8Km/h47km/h21002000150$6000.00
Wind Gyro 3000 300024/483.6Km/h12.6Km/h47km/h32003200230$18000.00
Win Gyro 50005000965 km/h14 Km/h35303900449$20000.00
Wind energy is the most difficult of the renewable resources to harness, due to the often capricious nature of the wind, and the mechanics of wind power, which is ruled by the "cube law". ie, double the wind speed = eight times the potential energy ! Before investing in a wind plant you should do some investigations into the average wind speed at the proposed location and turbine height. If it is less than 8 knots ( 4 metres per second ) forget it ! It's as simple as that ! For a wind plant to be effective you need good consistent winds, which is why they are more successful in coastal areas. If in doubt, better to stick with solar panels, perhaps with a backup motor driven genset.

Also, energy output is proportional to the square of the diameter of the propellor, such that a 2 metre diameter propellor will capture four times the energy of a 1 metre diameter propellor. Use this simple law, to compare various models of windplant, and to expose the ridiculous over rated specifications published by certain manufacturers....


      The Swiss engineered UNI-SUN V.A.W.T employs a unique 16 Pole neodimium magnetic rotor. The mating coils of ‘stator’ windings are fixed, such that the output is routed directly to the base of the mast without carbon brushes or slip rings, common in H.A.W.T turbines , ( Horizontal Axis Wind Turbines ) which are prone to wear. The 16 pole rotor also minimal ‘cogging’ effect, yielding the smoothest, resonance free rotation and lower start up speeds.       8pxspace  

2000 watt Vertical Axis Wind  Turbine installed by engineer Christopher J Darker near Perth , Western Australia in 2013.

Kilowatts in the sky

View from beneath the 2000 watt VAWT, showing the details of the compound Savonius and Darrieus turbines. These are the most unique and incredible wind turbines I have ever had the pleasure of installing.

2 - 3 KW LOAD DUMP. The function of the wind turbine controller and load dump is to convert or rectify the incoming multi-phase Alternating Current into Direct Current suitable for charging the main battery bank and also to prevent the battery from overcharging by incrementally diverting the wind turbines energy into the two large power resistors to dissipate it as heat. The power resistors can be seen at the top of then unit together with their thermostatically controlled cooling fan. The three phase bridge rectifier can be seen at the bottom left hand side of the controller with three red wires leading into it. The thicker red and black wires coming out of the bridge rectifier, feed Direct Current ( D.C ) into the main control circuits and load dump. The thick red and black wires at the bottom right hand side is the regulated D.C output to the battery bank. The myriad of other parts on the main circuit boards includes a microprocessor and power filtering and measuring components. The entire assembly, in its steel, powered coated case is mounted within a few metres of the main battery. 8pxspace  
Salmon Beach 1985 Esperance
 Salmon Beach wind farm Esperance Western Australia. Aerial view of the initial stage of the Salmon Beach Wind Farm in 1985. This was the first wind farm in Australia and comprised 6 x 60 Kilowatt West Wind turbines built in WA by Geoff Hill and Company. The total farm output was only 360 Kilowatts but was used as an experimental station in combination with a 10 Megawatt diesel power station that ran the remote and beautiful coastal town of Esperance. Western Australia.

Engineer Chris Darker. Western Australia has wild flowers and wild winds. I spent several years at the Esperance wind farm as the resident electronics engineer, looking after the electronic control systems, data and telemetry systems. Behind me is turbine number one . “ Dynamo Hum “.

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