Ann: Appendix 3B, page-13

I did a quick engineering review of EVM in about 2002 for a potential investor. My advice was that going from a 0.050 Megawatt prototype to a 200 Megawatt plant in one step was extremely high risk. It is an increase of 4,000 times. The tower output would not simply scale as the size changed. For example there is loss of energy due to friction as the collector diameter grows, as all the air has to flow 2 to 3 kilometers under the canopy to reach the tower. I also had concerns about the cost.

The collector would be by far the largest area covered on earth by one building. The collector circumference would typically be 12 kilometers with a diameter of 4.8 km. This is a huge structure, far bigger than any airport.

Possibly 18 million square meters of toughened glass. The cost would be at least a billion dollars for the collector alone and this assumes the cost of a toughened glass structure meters above the ground can be brought down to say $60 per m2. This enormous covering has to survive maintenance free and intact for say 30 years of high temperature and pressure, with minimal reduction in light transmission.