Some of the design parameters for this years chassis was to be lightweight, easy to maintain, simple to make. We used a CNC punch press to punch out our drive base. The material is .090" 5052. Note the simple round holes in a stagger for lighting the material.
The Cad team came up with a innovative way to incorporate the belly pan into the front and back panels. The side rails slide into the belly pan and are riveted together. We call it the clam shell design.
We use .250 high pressed in standoffs, a plastic isolator and nylon screws to attach electronics.
This chassis weighs in under 12 lbs and is very rigid and strong.
https://picasaweb.google.com/1045493...89068712771618
http://www.youtube.com/watch?v=znSKHoLEN5U