The interlock drive system drive greatly increases field mobility, especially for light weight machines. The youtube videos below demonstrate the climb and descend on loose soil at an inclination of 30 degrees. The maximum inclination we tried was 40 degree and the result was similar. It is difficult to find loose soil of an even steeper inclination. Recently we have been issued US patent 9,144,188 and US patent 9,945,832 for this new and useful invention.

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Utopus climbs a hill at 30 degree inclination
Utopus climbs a hill at 30 degree inclination )
Utopus climbs a hill )