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http://sploid.gizmodo.com/this-mind-bending-machine-completes-one-turn-every-2-3-1457516789
So I read the article above and it gave me an idea, I want to find out if it is possible to build this machine, but with a reverse gear set on the other side of the concrete that makes it spin back up to the original or close to the original speed. Obviously with the gear ratios he has used the losses and slack in the drive train would never work however I propose a this alternate design:
200rpm motor like he has only the block of concrete is on a gear that turns maybe every 8 hours, to the human eye this would look like it is not moving, then put the reverse gears back up to get it spinning on the other end eg:
5 * 10:1 gear reductions, then 5 * 1:10 gear step ups so rpm would be:
200, 20, 2, 0.2, 0.02, 0.002 (8.3 hours for 1 rpm) then step back up to 200 rpm.
How much torque would the middle gearset need to be able to take and hence would it be physically possible to build this machine and have it fit in your room? Even if you require an extra 6 or 7 gears on the reverse side to get the speed visible to the eye due to the torque losses.
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