Here's some photo's of a 1/12 scale Challenger logging truck. The origional full size trucks were manufactured here in Port Alberni and I machined a number of parts for each one. As well as fabricating the rear ends with functional diffs for the model. My father built everything else from scratch.
The truck is 32" bumper to bumper and weighs roughly 75 pounds. The preload is functional and is run via screw drive from a 3/8" cordless drill. The main drive is also a drill motor with high and low gears. Currently it is tethered to a remote box but plans are in the works for Radio control.
loader 008.jpg
loader 003.jpg
loader 007.jpg