Thanks for that advice. I think if I take my ss tube to the sand blasters that would,reduce the thickness a little . The first use might be an f7.2 newt as I have all the parts and so the front section , or the whole middle section, may be simply open aluminium struts.
I have also looked at carbon fibre as I have been doing a little epoxy fibre glass work lately and it could not be too hard to use the tube and some plastic sheet under foam as a mandrel form
Quote:
Originally Posted by hamishbarker
1mm is a bit thick. stainless has lower yield stress than carbon steel. I have a 0.55mm straight seam galvanised steel tube on my dob, $27 from the local duct shop. now locally reinforced at the focusser by riveting a ring of 5mm flat aluminium.
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