You can read a short a history of the RAE's wind tunnels in our
History and Learning Briefing No 13.
Also, the results of the restoration work, led by the specialist restoration architectural practice Julian Harrap Associates are very impressive and there will be many good features to be photographed once the buildings are completely clear of scaffolding. We will be working on this soon.
A generalised history and operations of wind-tunnels can also be found on Wikipedia at http://en.wikipedia.org/wiki/Wind_tunnels
And a good description of the history of the Farnborough Wind Tunnels and the Listed Buildings related to them can be found in this Rushmoor Borough Council Committee Report.