The redesign of the Mk1 also took a significant turn towards composites, albeit with some hesitance at first. “The adoption of composites had a significant financial impact to my pocket, not to mention that I alone had composite experience,” says Mc- Camley. “I always intended to use composites but I expected it to take longer to get here. However, I wanted composite parts for my smaller machines because I knew the weight savings would help in shipping costs, assembly requirements and roof structural issues.”
The newly designed Mk2 utilizes a proportionally large, double curvature stator, which McCamley explains is most easily accommodated using composite materials. “Having designed the shape of the Mk2 machine to have a lot of curve, it became quickly apparent that the stator blades, like the rotor and main blades, should be made of composites,” he says. “The rotor shaft is still currently made of metal but could also be made of composites. However, for strength and stiffness reasons we might use carbon rather than glass composites.”
Currently a full-scale prototype of the turbine is being tested at Keele University Science Business Park in North Staffordshire, England. During the next six months, McCamley UK CEO Scott Elliott says the company will finish plans for a 12kW model. “Wind energy has huge potential, but the traditional wind farm models are just not effective and are certainly not suitable for urban environments. This leaves a huge gap in the market where businesses, residential blocks and other organizations could be benefiting from clean energy,” he says.