Editing Propulsion (section)

===Ground===
[[File:Opel Ampera (front quarter).jpg|thumb|Wheels are commonly used in ground propulsion]]
{{main|Ground propulsion}}
Ground propulsion is any mechanism for propelling solid bodies along the ground, usually for the purposes of [[transportation]]. The propulsion system often consists of a combination of an [[engine|engine or motor]], a [[gearbox]] and [[wheel and axle]]s in standard applications.