Why not a cylindrical observatory?
Posted 10 February 2013 - 08:05 AM
The Clark dome houses the Clark refactor that Percival Lowell used in founding the Lowell Observatory.
And Clyde Tombaugh used the telescope in this building to discover Pluto.
I would say that there are a few pretty famous cylindrical observatories around.
Posted 10 February 2013 - 09:48 AM
I like your second link...
Here is a simple solution for the track... Using an octagon of 2X12 or similar pieces, you can inscribe a circular track.... Instead of trying to make a perfectly circular piece.
I would use two courses rotated a bit so that their seams are not inline - to give additional strength.. Then put rollers on the bottom of the octagon shaped "cylinder" to rotate it...
I built mine almost as by your sketch. Click the first image and you see how I built it. The "dome" is made of aluminium sheets which are fixed and sealed on a wooden sceleton. The Cityobservatory has resisted wind, rain and snow few yeas. Inside there is a 10" TAL250K or a 10" Newton astrograph.