Scientific explanation of those maddening washboard roads!
- Thread starter cboyd
- Start date
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Someone is bored while waiting at the dealership 
The tests all used uniformly shaped and sized sand. I wonder how the results would differ if they mixed sands of different grain sizes and shapes, such as a gravel road.
The tests all used uniformly shaped and sized sand. I wonder how the results would differ if they mixed sands of different grain sizes and shapes, such as a gravel road.
Any motocrosser/desert racer/mountain biker will tell you how they are made. The we can consider skiers who enjoy moguls, made essentially the same way...