Description:
This video demonstrates how to set up a simple 3:1 pulley with a Petzl Reverso. Note that the Reverso acts as a 'progress capturing device' as it allows slack to feed into the device but not back out, much like a one-way valve. However, it adds quite a bit of friction to the system. In most cases, anything but a short haul (to help someone get through a crux, back onto the route after falling off a traverse or roof, etc) will be very difficult with a 3:1 with a Reverso. For most other scenarios, you will need to use a 5:1 or 6:1 compound pulley system.
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Video length: 03:00