Re: re Ballscrews/linear drive

Steve,

How about air cylinders? (double acting would allow you to "lock" them
somewhat closed. Probably not necessary) Use a small compressor in
"bleed" mode. Fast operation, inexpensive, reliable...
When power goes out, easy to open!

Hope this helps.

Ballendo

>No, because this will be two doors pressed together in the center.
>And worst case, in smoke and fire I want this to be intuitive to open
>Steve