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Soul Cycle Mothership, a molded fiberglass speaker cabinet for bicycles.

Step 2Create a rough version of the shape, in foam.

Create a rough version of the shape, in foam.
In order to create your foam shape, you'll either have to sculpt it freeform like Michelangelo, or carve it from a block of foam with CNC tools, or use routers and templates to help you make it. I chose to use templates and routers.

In the series of photos you see that I stacked the templates (which are made by 'tracing' a master template with a router) with threaded rod. Then I shot expanding foam into the form (inside a garbage bag.)

Then I used a hot knife to slice away the excess foam. The masonite templates stop the knife from cutting too far.
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1 comment
Aug 17, 2010. 7:38 AMDuke Luke says:
What kind of foam do you use? And where can I get it (as well as these other materials)?

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Author:fossilfool
Fossil Fool, the Bike Rapper, a San Francisco street performer and bicycle entrepreneur. Invented the Down Low Glow, a neon safety light for bicycles. Develop high-end sound systems for bicycles used ...
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