Erle-Rover is a Linux-based Unmanned Ground Vehicle (UGV) that uses the Robot Operating System (ROS) and the APM:Rover autopilot. It is ideal for outdoor operations.

Feature Description
Dimensions 53X19.3X29.7 cm
Wheel base 33.4 cm
Diameter of the wheels 112 mm
Width of the wheel 45 mm
Drive System 2WD Rear
Gearing 48dp

Go to ardupilot web page.