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12-inch F6 Truss Dobsonian
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Rough Draft
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An early version of my 3D model used moon-shaped altitude bearings. The torques for this particular arrangement left a deficit below the balance point. This is partly due to the rather long focal length of my primary mirror. Most 12" or 12.5" truss-dobs are f/5 or f/4, mine being a full foot longer than the former. I was forced to redesign the bearings and correct the imbalance.
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Outdoor Blog
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