The general concept for this cantilever was to include corregations. I believed this would give strength without adding a lot of weight.
Two panels on either side held the corregations and gave a side profile. Hot glue held everything together. I added a lot of hot glue for strength.
Each hot glue bead was strategically placed along the cardboard.
Side profile- with slots to fit into the jig and add scale.
Testing / Failure
As you can see just in front of the bar, there is some creasing and bending of the cardboard. The failure is due to the corregations being vertical when the force is running horizontal through the cantilever.
Class comparison
The cantilever weighed 125 grams and supported 2400 grams of weight. This gave a strength to weight ratio of 19.2, placing me 1st in the class. I was surprised by how well it worked.
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