Turbine Heights

The diagram shows some turbines in comparison with familiar objects.  From left to right we have the "Gherkin" (30 St. Mary Axe) in London, which is one of the biggest office buildings in London and 591 ft (180m) tall.  Next, and almost too small to see, is a double-decker bus.  Then there are 8MW and 5MW turbines 657ft (200m) and 542ft (165m) tall, which is a plausible range of sizes for the Navitus Bay farm. Amazingly, the entire height of Salisbury Cathedral would very nearly fit between the blade tips of even the 5MW turbine. This first group of objects is shown at the correct relative scale as they would appear to an observer on a cliff top 45m above sea-level, 14km away. You have to stand back from your PC screen a distance of 78 times the height of the Gherkin (measure it on your screen) to see these objects at "life-size"; remember there would be many of them.

For comparison, the "small" turbine on the right is modelled on Eneco's other windfarm off the Dutch coast, the "Prinses Amalia" farm.  There, the turbines are 99m tall, but at a range of  24km.  The diagram shows how the relative scale of the Navitus Bay turbines compares with what has been built on the continent taking both size and distance into account..