Here is my six-wheeled amphibious tank-design with some improvements for the rig.  * [Demo-Video](https://youtu.be/uxxHDwhHRLs) I tried to create a simple rig animation control with ground detection for the wheels and the suspension. Also I added some animation-constraints for the steering wheels in the front and the rear, the guns and the outboards. The animation happens on bone-layer 1. Just for fun I created a driving through a wall physics animation by using cell fracture.  Feel free to use it for non-commercial projects. Modeled and textured in [3D-Coat](http://3dcoat.com/de/home/) for rigging and animating I used [Blender](https://www.blender.org/download/).