Decorative assembly: Tongue and groove
Dimensions: About 25 cm (10 inches)
Model for business gifts. Several colours available.
Also available in a larger size for museums and universities (from 23 inches up to 8 feet long).
This rattleback model is very spectacular. The inversion motion of the spinning direction is by far the fastest and the most confusing of any other kind you may find. I invented this type of rattleback with joinery to augment its atypical motion. The results have surpassed all my expectations. The behaviour of this object really seems to go against the laws of physics.