10:42
At one point I took inspiration from a transformer toy. T2 Dinobot front the old Beastwars show had a toy tail that was a base mechanism with all the gearing in it, the out from there were 2 belts that came out and had "ribs" attached to it to makeup the bulk of the tail, then the tail-tip was solid so-as to connect the belts. As the mechanism turns one way or the other it tugs on one belt or the other effectively shortening the free length of the tail on that side and making it appear as tho the tail swings or moves in that direction.