VERY rough sketches. Our original design was based on the middle left design with six holes. Our final design is more similar in structure to the design on the right.
Detailed sketch of the final design produced by my team.
This is the spinner that failed. It was too heavy and it broke during an attempt to optimize its weight.
This is our final spinner, it worked, and it spun longer than the failing design despite weighing less.
This piece tested the fit of the nickels and the later unused steel precision balls.
The breaking point: failure of the original design.
This video represents about one minute of spin time.
The successful design had the following results.
Tier 1: 35.92 s, 42.76 s, 48.66 s.
Tier 2: 1:01.99, 1:01.78, 1:07.94.
Tier 3: 1:06.63, 1:07.54, 1:03.10
Along with these results, we discovered that more weight does not equate to a better performing spinner. The heavy spinner performed poorly. It would slow itself down, rather than carry itself like we imagined it would. A better solution is to distribute weight on outstretched arms or spokes of a spinner. Some other groups did this very well.
A Bit about My Personal Spinner
I designed my spinner before learning about the engineering design process, so the detailed steps are missing. I had a simple idea to make a spinner that looked like Rutherford's model of the atom.
A detailed sketch of my idea.
I don't have any pictures of the final model because I haven't seen it since the art show. You've all seen it anyway.