Basic Wind turbine Kit...

This kit is no longer available.  I have left the page in for reference to how it works and what it looks like.

Don't quite understand how it works?  Read below.....

This is a self furling unit.  The furling system is based on mother natures best kept secret - gravity.  When the wind  reaches a certain speed, the unit self furls based on the tail weight.

The way this works... The head pivot point and rotor shaft center are offset.  The extent of the offset is determined by the diameter of the rotor.   When the wind exerts itself against the rotor ( Rotor Thrust ) it wants to turn because of the offset head.  The angle of the tail mount and weight of the tail determine the amount of resistance there is to this turning.  The system is very similar to the "caster" angle used in automobiles, when you turn the wheel to the left or right, one side tends to lift the car.  When you let go of the steering wheel the weight of the car tries to bring the wheels straight again.  This is the same basics this wind turbine uses.  The angles and weight are calculated to adjust the furling to any windspeed.

The Rotor thrust can be calculated by using the following formula.

Rotor Thrust = Diameter^2 * Velocity^2 / 24

Rotor thrust is in kg - to convert to lbs multiply kg by 2.2

To Calculate the tail weight or to find the tail mount angle... we need to know...

Rotor Offset ( meters )

Diameter of Rotor ( meters )

Wind Speed ( meters/second )

Tail tip weight ( kg )

Length of tail ( meters )

Then we need to calculate....

Rotor Thrust = Dia of Rotor^2 * Windspeed^2 / 24

Tail moment = Tail tip weight * Length of tail

Rotor moment = Rotor Thrust * Rotor offset

Tail mount Angle = sin-1(Rotor moment / Tail moment)

If you need to find the Tail tip weight at a given tailmount angle then...

Tail moment = Rotor moment / ( sin(Angle in degrees))

Tail Weight = Tail moment / Length of tail