THE wrong kind of wind? It’s a phrase that haunts those desperately trying to justify wind farms in Britain. However, apologists for the giant turbines now face the unpalatable truth that structures designed to operate in windy conditions literally fell flat on their faces when the wind became a bit too strong.
As storms battered Scotland on Thursday a 300ft turbine exploded like a giant Catherine wheel, showering the countryside with burning debris.
Witnesses said fire erupted in the centre of the £2million turbine in Ardrossan, North Ayrshire, then flames covered the blades.
The day before, a turbine at Coldingham in the Scottish Borders was brought crashing down by the wind. Several homes had to be evacuated and a road closed. On Tuesday a turbine put up earlier this year fell in high winds at Scapegoat Hill near Huddersfield .
Check out D B Parker's SandPiper 3 Spiral Airfoil and the Dynasphere from Earthships (further down). They rotate more slowly. Spiralairfoil also has an interesting graph of power diagrams on their site
showing that the SandPiper produces higher energy per swept area than those airplane propeller types, at lower speeds of rotation ...