Product Specifications

How to Calculate the Braking Distances for the Brake System

Calculating Zipline Braking Distances with The ZipStop Braking System

To calculate braking distances for the zipSTOP Brake Assembly follow the steps in the ‘Configuration Worksheet’ along with the information contained in the ‘Braking Distance Charts’. Refer Section 11.

Always carry out unmanned testing to determine actual braking distance! The information contained in this manual is intended for guidance only. Calculated braking distances for the zipSTOP Brake Assembly are estimates only and may differ from actual braking distances achieved on individual zip lines.

Before starting the zipSTOP configuration you will need to determine the rider weight range, rider arrival speed range and preferred Reduction Ratio for the zipSTOP installation.

Information required for calculating zipSTOP braking distances:

  • Rider weight range
  • Arrival speed range
  • zipSTOP Reduction Line ratio

A number of other variables will affect the final performance of the system and must be taken into consideration when designing the complete zip line braking system. These include, but are not limited to:

  • Line slope
  • Emergency brake design
  • Friction
  • Weather Conditions (e.g. wind, rain, humidity, temperature)
  • Environmental factors

Braking Distance Charts

CAUTION Always complete unmanned testing is to determine actual braking distances and points of dismount.

Calculated braking distances shown on charts are for guidance use only. Actual braking distances will vary due to site conditions, weather conditions and final configuration of zip line set-up.

Braking distances shown on charts refer to installations where zipSTOP Braking Line is fully retracted when Brake Trolley is positioned at the start of the Arrest Zone (Reset Position). If zipSTOP Braking Line is not fully retracted, or if static line extension is present when Brake Trolley is reset, then actual braking distance will be different to that that shown on the chart.

Braking distances that fall below the ‘BDmin’ line will result in high level of braking force being felt by the rider, and may cause severe swinging up of the rider’s body during braking. ZipStop should not be installed in these ranges - it is possible a 3:1 or 4:1 reduction system may be needed and you should contact a qualified installer before proceeding.

 

Configuration Notes

  • BDmin Line (BD): BDmin line indicates the rate of deceleration that may be considered uncomfortable and result in severe rider swing up when stopping. It is not recommended to operate the zipSTOP with combinations of rider weights and arrival speeds that fall below the BDmin line.
  • Line Extension (LEX) – Line extension is the distance the Braking Line extends out of the zipSTOP brake Unit. If LEX is greater than 12.0m then reduce max. permissible approach speed (ASmax), Permissible rider weight (RWmax) or increase Reduction Ratio (RR).
  • Buffer Zone (BZ) – Buffer zone is the area after the Arrest Zone in which riders are safe from impacting the terminal end or any other object in the event they overshoot the landing zone. The buffer zone must include the maximum distance required for the emergency brake to arrest a wayward rider.

 

 

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