Rattleback Twins

thingiverse

These mirror-image rattleback models are inspired by Jasay's original design. When spun clockwise, the "cw" model reverses direction to spin counterclockwise, while the "ccw" model does the reverse when spun counterclockwise. A demonstration video is available at http://mysd300.blogspot.com/2010/12/rattleback-twins.html. Distinguishing features of these models include a 45% reduction in Z-axis height compared to Jasay's mesh and base alignment at Z=0 for easier use with skeinforge. Additionally, the flat side faces down, eliminating the need for reorientation or raft usage among Makerbot users. For smoother contours, consider building the part sideways if your build process allows it, as demonstrated in the video.