ATR2-b2

Whereas ATR2-b1's structure was held together with bolts, ATR2-b2 is secured via the JB-Weld cold weld compound.  Eliminating the bolts allows for easier expansion into a 3-dimensional cubical frame, which multiples the horizontal surface area available for mounting components.   Pictured is the framework disassembled from the wheel mounts.  Note that the original shock absorbers are still in place, although stiffer springs have been installed to support additional weight.

ATR2-b1 (Rover #2 build 1)

ATR2 is based on a stock Stampede Traxxas VXL.  The plastic central chassis has been replaced with an aluminum framework.  ATR2-b1 (build 1) is pictured with the original electronics in place, as high speed mobility testing helped to verify that the modified Ackermann geometry (lengthened chassis) would not cause steering problems. The framework, built by Andy J. Mullen, is composed of hollow square aluminum tubing, 1/2" on a side, 1/16" thick wall. 8-32 machine bolts of various lengths ...