From: "Tom Krajci" 
To: 
Reply-To: "Tom Krajci" 



>From: "Jerry B. Hillman" 

>...My conclusion: My mirror cell is stressing the mirror. I posted the
>design to my web page and the link in an earlier post today. I guess I
will >make another try at learning plop to design a proper flotation mirror cell.

This conclusion does not surprise me, and I predicted it before I heard of
your test results.  The results should not have surprised anyone on this
list.  I have yet to hear of a static (non-flotation) mirror support that
does not stress the mirror.

PLOP will help you determine support point layout and flotation part
dimensions and layouts.  You still need to choose a proper design approach
for your hinges (compliant, etc.)...whether or not you will RTV the mirror
the the cell, or use a sling, cooling arrangement, etc.

See: http://overton.tamu.edu/aset/krajci for some info and ideas on mirror
cells, and links to a few other folks that have done some very detailed
analysis with PLOP.

Tom Krajci
Tashkent, Uzbekistan

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