There are multiple factors that must be taken into account such as weight, strength and thickness.
With our prototype we used a card base however it was instantly clear that card was not strong enough to support the circuitry. It did however give us some idea of what size was needed and what shape was best.
With card ruled out as a usable material the realistic choices were down to acrylic, wood (such as plywood) and metal (such as thin aluminium)
In the end it was decided that thhe chassis would be built from a thin aluminium due to the advantage in strength whilst not comprimising on the weight. A hole was added where a brass runner was placed that would mean the buggy is held up at the front.
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