Night Owl Heavy duty wind turbine. New design 90 alloy blades. 5mm steel braket, 6.6mm steel hub. Furling adjustable tail section, adjust furl from low 25mph winds. 43 long tail very heavy duty.You will need a 2 2/4 tower section approx 30ft. Total weight of the kit is 28kg. Sale is for 1x dual PMA for you to build into a wind turbine Dual core 12-18v DC 3 wire AC out Weight of PMA is 8kgs Bench tested and power chart show volts and amp' s We are still developing a big enough blade to spin the PMA, You can make your own blades from wood and fiberglass Because this PMA is so strong you would need multiple large blades at least 4 ft blades 8ft diameter or above for a set of six. Size would be larger if using 3 blades. Use these powerful permanent magnet alternators (PMA/PMG's) to make cheap electricity from Wind, Hydro, Steam and Bio-Diesel power systems. Stop wasting up to 50% of your power energizing the. Coil of standard brush type alternators. Permanent magnet alternators are by no means standard "Automotive". Alternators containing brushes and electro-magnetic coils. Not waste power by having to continuously create an energy intensive magnetic field. We sell only highly efficient - long lasting true permanent magnet alternators! You will need to source or make yourself. Large blade set and Hub. Bridge rectifier to connect the 3 wires from PMA AC to make DC volts. Mounting bracket for PMA to fit to scaffold tower. You will need to make the tower very strong. The item "Super heavy duty Wind Turbine Night Owl Lower wind New design 12 24 or 48v" is in sale since Tuesday, June 14, 2016. This item is in the category "Business, Office & Industrial\Industrial Tools\Generators". The seller is "hornet-bestturbines-uk" and is located in Huddersfield. This item can be shipped worldwide.