Quote:
Originally Posted by Merlin66
The "hinged" attachments also allow for the parallel deflection of the top and bottom rings to maintain their parallel alignment.
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hi Ken,
Interesting point, would you have links to examples of these hinged attachments?
Most of the serrurier truss telescopes in observatories seem to have the truss nodes welded in the centre and extremities.
this was one I could find
http://en.wikipedia.org/wiki/Serrurier_truss
VLT is another example where the nodes are bolted to the centre frame
http://www.cosmicdiary.org/fmarchis/.../01/pano9.jpeg . not sure if its built on the same concept.
for the parallel deflection to work, would the truss nodes need to be a material that can compress or stretch? else how would they deflect even if the hinges allow small movement of the nodes?
that "Rigid dick" telescope design sounds interesting!!. couldn't find any references though. how does it work structurally?
Cheers
Alistair