The magnetic zipline brake uses a reaction between a non-conductive metal and magnets called Eddy Current. The principles itself is very reliable as it is a law of physics.
It allows us to gently bring to a stop rider from speeds of up to 70 km/hour regardless of the rider’s weight. In other words, this zipline brake system will apply more brake force as the landing speed increases so lighter people arriving slower will not be affected too much by an adjustment made for heavy people.
Such zipline brakes can be adapted to existing zip lines, but due to the space needed for controlled braking, it will perform at its peak efficacy on a specially designed zip line.