pic: CB234 Miniature Robot at Math Alive - Smithsonian

[Chris Fultz]

It is about 1/3 scale, but not actually 1/3 tall. We had to be under 18" total height.

It is mostly aluminum. The frame and structure is aluminum bar - 1/2" x 1/2" or 1/2" x 1". Most other pieces are made out of solid aluminum material. There is some delrin, some lexan, some plastic, some plastic tubing, and some electrical wire. We tried to use stainless steel connectors everywhere since it will be "on tour" for about 7 years. All of the aluminum material is anodized for protection. The "tube" is a foam craft wreath painted with plastic paint to keep it sealed.

Everything was machined on our mill, lathe or with hand tools and the main structure is welded.