Re. the orrery: I've seen one made from Meccano (sold as "erector sets" in the US). It was a cylinder about a foot and a half wide and considerably taller than I was =^.^=. Getting the gear ratios right with only Meccano's stock gears made for big gearboxes.
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timeasmymeasure
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Date: 2014-08-09 06:06 am (UTC)