wow, that's so cool. I like the wooden ladders between the fork of the Isaac Newton scope. that's pretty massive.
on the serrurier topic, are there any real world measurements of deflection at the ends when its horizontal? I presume there would be measurements to validate the design.
the deflection on the 200inch Hale for example..
http://www.astro.caltech.edu/palomar...og/P-28069.jpg
Sorry Jo, don't meant to hijack your thread...
Alistair