Re: [ATM] Flex Mirror Tension

["Bill Kelley" <flex@commspeed.net>]

Bryan,
We don't ordinarily use full thickness mirrors for flexing. Yes, the 
calculated tension is correct for a mirror that thick. A proof of concept 8" 
F6 I made was 1/2" thick and correction was close to the predicted 25 lbs. 
of tension.
Bill Kelley


From: "Bryan Stiles" <bryan.stiles@gmail.com>
,
>   I am contemplating the construction of a flex mirror. I have
> studied the Adler article as well as internet resources and seem to be
> unable to find any ballpark numbers for the upper tension limits of
> the cell.
>   For example I am working on an 8" f/6 mirror (full thickness
> blank). When I run the FLEX program, the tension is something like 323
> lbs. Is this acceptable? Normal? I'd appreciate any input. Thanks.


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