22. 1943 Sd.Kfz 2 NSU HK101 Kettenkrad
Source: www.airbornegarage.com
Is it a bike or a tank? Hard to say. The Kettenkrad HK 101 started out as a light tractor for use by airborne troops. It had the advantage of being a gun tractor small enough to fit inside a Junkers U 52 aircraft cargo hold. To steer the beast you simply turned the handlebars. The trick lay in how hard you turned them. For instance, if you turned the handlebars slightly then the front wheel would provide all of the steering. However, a sharp turn of the handlebars would engage the tracks to make turning on a dime possible whenever the situation called for it. Also, since it had tracked wheels it could climb high hills and steep terrain, so long as the driver had courage for the task.