[ATM] fans

[Don Clement]

> >I think that you have showed that your implementation of a fan(s)
>mounted in front was inadequate to homogenize the boundary layer
> >for your particular scope.
>
>
> "Inadequate??" Really? How did I show that? I have been plainly saying
just the opposite.

You also plainly said "Since the front of the glass is insulated with
aluminum the fan takes forever to cool the mirror."
 Aluminum has a thermal conductivity of  ~230 W/(m·K) borosilicate glass has
a thermal conductivity of ~1 W/(m·K)