This remote-controlled wagon is silly but so very useful - The Verge

Automated excerpt

But the DuneRover also proved very capable, with enough torque to flatten hills even when carrying over 200 pounds of gear. Walk faster and the wagon will roll faster. When I stopped, so did the wagon, even on that 10 percent grade with a 200-plus pound load. The motors aren’t powerful enough to haul that same load through soft sand, however.

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