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Your average non-rolling load is a perfect example of Newton's Law of Inertia, i.e., a load at rest (=non-rolling) will stay at rest until somebody in a big truck comes along with a winch and drags it away. The thing about non-rolling loads is that you have to take into consideration the surface and grade that they are at rest on. You have the weight of the load and surface friction working against you, so you need a lot more pulling power. To calculate the minimum capacity of the winch you will need, take the gross weight of the load and multiply it by 1.5.
|Jennifer Mathes, Ph.D.|