[ATM] Re: Second Thoughts on Mirror Support

[stuart452 at earthlink.net (Stuart Hutchins)]

> Suppose instead of a THICK steel plate you use a very THIN plate--even 
> sheet metal.  You sandwhich three layers: the metal, some plush 
> carpeting, and an underlying support (e.g 1.5 inches of cured/dried 
> plywood sealed against humidity changes).  Use a torque driver and 
> screws to make sure all of the connecting bolts have the same tension.  
> Put a central hole in the sandwhich so that air can be forced between 
> the mirror and the back plate using a small muffin fan. Then, RTV the 
> mirror to the metal using multiple, small area pads. 
> 
> The hope is that the sandwhich would give similar all-over support as 
> the carpet used to grind/polish the mirror on, yet have airspace for 
> forced ventilation, while the RTV avoids the need for a sling.
> 
> Thoughts?
> 
> Jeff Anderson-Lee
 
I think a standard flotation system is surer and easier to build.

Regards,

Stuart