On 05/11/2011 12:10, The Natural Philosopher wrote:

It's there more for statistical analysis: I want to do a 'what if we had
XYZ wind power, what would it cost and how much fuel; would it waste'
type calcs.

There was at least one period earlier in the year (but probably more)
where the windmills were producing next to nothing. Have you any figures
from this (these) period(s) as to duration (of say minimum plus 100%)
and the actual minimum reached?

--
Roger Chapman