Make a Flip flop winch when stuck in the woods


All you need is 50’ of 3/4” thick/diameter 17,000 lb. test rope to make your own winch to pull your vehicle out of the mud.



To pull from a different direction if necessary, use the Super-Strength of Physics

You could get a second rope and pull on the center of the second rope connected to your flip flop winch:


The forces at the point of contact have to add up to the zero vector if it's in equilibrium.

Rope Physics

At this point, there are essentially three forces.

With the contact point in equilibrium, these forces have to add to zero. The only component of force that is interesting is that perpendicular to the rope. Assuming the magnitude of the two tensions is the same, then:

If the distance from the car to the tree has a value of L, then pulling perpendicular a distance of x would give the following for sinθ:

Calling the perpendicular distance "x"

Substitute this expression for sinθ, get the following relationship between tension in the rope and the force to pull with:

With the term in front of F as the "force multiplier".

An example with actual real numbers:

Have a rope that is 4 meters/13 feet 1.5 in long and I pull to the side with a force of 20 Newtons such that it is displaced 10 cm. Putting these values into the above expression= a tension force of 200 Newtons—or a force multiplier of 10! BUT BUT BUT use another 50’ rope to get even more power.

This is essentially a simple machine. You pull with a small force over some distance and get a much larger force out, but that larger force would only move the car a little bit (small distance). If you need to keep the car moving, re-tie the rope and repeat the process.