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Westwind Turbines

PRODUCTS - OUR BLADES

Westwind blades are made form pultruded fibreglass sections and are designed to last the rigorous 20 year long service life required of a Westwind turbine. No Westwind turbine has experienced a catastrophic blade failure. 

At present all our turbines, except the 20kW, use blades of which the raw material is pultruded. Pultrusion is a process where the material is made in an "endless" moulding process. Our blade material is made in Denmark, by a leading composites manufacturer, who make many structural pultrusions. The profile is Westwind unique & bespoke design however and it is well proven and has been in our design for many years; problem free. While other manufacturers will continuously promote other supposed "new" or advanced products, we are using with the "known" and tested material. We do however have other blades on test, which look already to be a huge technological advancement in our design. Westwind however, unlike others, will not be using these materials until they have proven their worth, after extensive years or testing. The raw material we use is placed in moulds in our factory, to fit blade mountings and blade tips. Using in house manufacture we can ensure the quality of our product.

Although we have had neither complaints nor problems with blade fit, we have moved toward CNC drilling and milling of all our pultruded blade roots. This is more precise and presents more insurance in the blades, as they cannot be out of cord, and our blades can run at the correct 120 degree separation every time. This also allows us to make more of them, as it is another job, which no longer has to be done manually, as a lot of our bespoke work simply has to be done manually.

The following table details the type of blades we use on each of our machines.

WIND TURBINE

NUMBER OF BLADES
BLADE LENGTH

3kW

3

1.85m

5kW

3

2.5m

10kW

3

3.0m

20kW

3

5m

Blade Material

Our blades are made from hollow pultruded fibreglass sections which have a wing type cross section (As shown below). The hollow design ensures the rotor is as light as possible but very strong.

Our Blades Module

THE BLADE PROFILE

The raw pultruded material is made in America using a process very similar to extrusion that can ensure a super high quality finished product. This is highly important for wind turbine blades that must live for a long time in through many very demanding weather conditions. The strength of this material is demonstrated by the fact that no Westwind turbine has ever experienced a blade failure.

Leading Edge Tape

The 3kW, 5kW  & 10kW blades have Helicopter Blade leading edge tape attached to the outer, high speed, portion of the blade. This protects the blade from erosion by airborne particles. the leading edge tape generally needs re-applying yearly in severe weather sites but may last many years in normal sites.

ATV Blades

The 20 kW machine uses well field proven blades manufactured by ATV in France. They are foam-cored blades made in ATVs "one shot process" overlaid with an epoxy, carbon and fiberglass composite. Like the 3,5.5&10kw blades the 20kw blade has been well proven. Like our other blades the 20kw blades are finished off in our factory. This lets us keep control of quality.




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