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Hi James,
yep, an imaging ota and mount would be quite a challenge. I am designing it from an imaging point of view with tight tolerances.
However I've covered most of the mount and fork requirements, it was just the OTA that I had to design.
I will definitely be using carbon fibre truss tubes, I've been looking at different joint designs.
If I manage to build the secondary section light enough, I could get away with an RC truss design rather than a serrurier truss as I could move the pivot point closer to the primary.
Final truss lengths would be after I've measured the back focus required.
I'm in two minds about the mirror cell though. it looks simple enough, but it requires reasonable precision. so not sure if I'm to build it or buy one.
haven't seen many ads for mirror cells.
Is there a min and max for the angle between trusses? from what I understand, axial rigidity improves with the angle.
Even with an F4 and well spaced primary rings, the truss tubes would be fairly long and angle small.
Will draw it up and see.
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