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12.5" f/6 Alt-Azimuth Mount Newtonian Reflector
Prototype History |
Progress Report5/18/03The images below show the completed base assembly of the first 12.5" scope. It weighs only 23 lbs. We were able to take about 11 lbs out of the baseline weight by strategically removing weight. You can see a simulated 14" trunnion on one side.
Progress Report6/1/03One of the new 1" thick, 14" diameter trunnions is shown below. We took out about two pounds with the material removal, and the openings will also be used as the carrying handles.
Progress Report6/9/03The images below show the completed G-frame Rockerbox assembly. On this model, the trunnions are used for handles. In the second image, you can see the three cam levers used to release the tube for rotation or rebalancing.
The first image below shows the way the cage opens to accept the tube. The second gives an idea of the overall scale of the scope.
Below, from left to right, 10" f/5, 12.5" f/6, 8" f/6. An old 6" mount is used to support the large tube since, without the components installed, it is not yet balanced.
Progress Report6/14/03The images below show the installed ring frames and primary mirror cell. The inside of the tube has been painted flat black and the end trim has been installed.
Progress Report6/15/03Today we covered the tube with Metallic Plum Monokote.
Progress Report6/22/03Success! The completed scope is shown below as it will appear at Shingletown. Based on the final balance measurements, a couple of minor tweaks will be made to the production units, but they will be visually indistinguishable from the prototype. The clouds rolled in within moments of finishing.
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