Mirror Rattleback Pair

The amazing work of Emmanuel Péluchon can be purchased here:
From Boisselier.ca: BUY NOW: Fine Woodworked Rattleback

Note: this site contains affiliate links for which I may be compensated

Other rattlebacks variations found here- check them out: physicsfun rattlebacks

Enantiomorphic Rattlebacks: due to mirror reflection construction, one prefers to spin counter clockwise the other prefers clockwise. This behavior is related to an asymmetry in weight along the left/right symmetry axis of these beautifully crafted objects- the dark wood is Apple which has twice the density of the light colored Basswood(Linden). This asymmetry in weight induces an instability, quite like the vibrations that arise from an unbalanced tire, that transfers the rotational energy to the intermediate rocking vibrations. This amazing set was made by Emmanuel Péluchon, fine woodworker and artist. 

The DeltaCELT Rattleback 

Get one here: 

From Etsy: BUY NOW: The DeltaCELT

Note: this site contains affiliate links for which I may be compensated

The DeltaCELT: a new rattleback design where the indentations create an asymmetry in the distribution of mass that leads to rotation reversals when spun: 1) If spun clockwise, after about two full rotations, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into end-to-end rattling (energy of oscillations) and then into rotational energy in the opposite direction. 2) If spun counter-clockwise, after about 30 full rotations the rotational energy translates into side-to-side oscillations leading to a clockwise reversal (swipe to see- less dramatic but still amazing). The design is made of solid brass and has the shape of a bisected prolate ellipsoid in the proportion of the mathematical constant δ =4.669.. (Feigenbaum dynamical constant) giving the name to this new design by astrophysicist Kenneth Brecher. The DeltaCELT comes with the polished slate spinning surface for optimal performance. 

Woodwork Rattleback

The amazing work of Emmanuel Péluchon can be purchased here:
From Boisselier.ca: BUY NOW: Fine Woodworked Rattleback

Other rattlebacks variations found here- check them out: physicsfun rattlebacks

Note: this site contains affiliate links for which I may be compensated

Woodwork Rattleback: prefers to spin counter clockwise- If spun clockwise, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into rattling (energy of oscillations) and then into rotational energy in the opposite direction. This behavior is related to an asymmetry in weight along the left/right symmetry axis- the dark wood is Apple which has twice the density of the light colored Basswood(Linden). This asymmetry in weight induces an instability, quite like the vibrations that arise from an unbalanced tire, that transfers the rotational energy to the intermediate rocking vibrations. This beautiful physics toy was produced by Emmanuel Péluchon.


Stainless Steel Rattleback

Metal version is available here: 
From Amazon: BUY NOW: Metal Rattleback 

These acrylic versions work great and are inexpensive: 
From Educational Innovations: BUY NOW Rattlebacks 
From Amazon: BUY NOW Rattlebacks 

Note: this site contains affiliate links for which I may be compensated

Stainless Steel Rattleback: prefers to spin counter clockwise. If spun clockwise, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into rattling (energy of oscillations) and then into rotational energy in the opposite direction! This behavior is related to the asymmetric shape of the bottom of this kind of rattleback, it's somewhat propeller shaped with an "S" curve along the bottom ridge.

Weighted Rattleback:

This beautiful weighted version is available from this shop in Germany: 
From experimentis-shop.de: BUY NOW Weighted Rattleback 

Note: this site contains affiliate links for which I may be compensated
See other rattleback designs in my collection here (and some links to the physics!) 

Weighted Rattleback: prefers to spin counter clockwise. If spun clockwise, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into rattling (energy of oscillations) and then into rotational energy in the opposite direction! For this rattleback design the wood bottom is symmetrical, and the preferred direction behavior is related to the asymmetric placement of weights near the ends which are slightly rotated off of the line of symmetry. 

Acrylic Rattleback

These acrylic versions work great and are inexpensive: 
From Educational Innovations: BUY NOW Rattlebacks 
From Amazon: BUY NOW Rattlebacks 

Note: this site contains affiliate links for which I may be compensated

Acrylic Rattleback: a favorite from my collection- prefers to spin counter clockwise. If spun clockwise, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into rattling (energy of oscillations) and then into rotational energy in the opposite direction! This behavior is related to the asymmetric shape of the bottom of this kind of rattleback, it's somewhat propeller shaped with an "S" curve along the bottom ridge