4WD EXPEDITIONS · Elite Offroad Craft

MECHANICAL ADVANTAGE: RIGGING THE PULL YOU ACTUALLY NEED

14 min · Full library · written from fifteen years in the terrain

The point

After this lesson you can rig simple, compound and complex mechanical advantage with blocks and rings, choose between them on purpose, and use a raised redirect to change where the force goes and how hard your anchor works - including why an overhead block can load an anchor less, not more.

Half the answer, free

The Technique

  1. Mechanical advantage is a trade, not a gift. Every doubling of pulling power halves your line speed and doubles the amount of rigging that can fail. The question is never "how much advantage can I rig" - it is "how much do I actually need", and the honest answer usually comes from why the straight pull failed: not enough winch, not enough anchor, or the wrong direction. Each of those has a different rigging answer, and this lesson is those answers.
  2. The baseline: a single line from winch to load is 1 to 1. Line tension equals the pull on the load. Simple, fast, least gear in the danger zone, and correct for most recoveries. Start here and stay here unless something specific says otherwise.
  3. A double line is 2 to 1: run the winch line out to a block on the load and back to your own chassis. Now two parts of line share the load, so each carries half - which means the load sees twice your winch's line pull, and the winch works at half the tension for the same result. The costs: half the recovery speed, and a block whose own attachment now carries the full combined load.
Still under the glass
  • Simple, compound and complex rigging, and why an overhead skate block can load your anchor less, not more
  • 7 more technique steps
  • The 6 mistakes that undo it, with fixes
  • The drill that builds the reflex
  • The safety non-negotiables

It opens when you book a trip that runs 4wd expeditions - these are the exact drills you run with your coach out there. Your booking unlocks this whole library.

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The activities we run can kill you. That is not a figure of speech and it is not a formality on a form. People are killed and permanently injured doing every single one of these sports, every season, including people who are experienced, fit and well equipped.

The specific ways it happens on our trips: buried and asphyxiated by an avalanche. Crushed by a machine that rolls onto you. Head and spinal injuries from a fall or an impact. Drowning. Hypothermia. Being hit by a tree, a rock, or another rider.

We operate in remote country. On most of our trips a serious injury means hours before a helicopter reaches you, if weather allows a helicopter at all. On some of them it means longer. There is no version of this where help is close.

You will be asked to complete training before you ride with us. That training is there to give you a better chance and to make you useful to the people around you. It does not make you safe, it does not make you competent, and passing it is not a qualification. Nobody can make this safe. We are not offering to.

Every person on the trip, including us, is relying on everyone else being honest about what they can actually do. If you are not sure you want this, that is worth listening to.

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