Product Specifications

Brake Assembly Configurations

Zip Line Brake Assembly Configurations

The zipSTOP Brake Assembly is designed to be utilized as part of a complete zip line braking system, and can be used for a wide range of zip line installations. The zipSTOP Brake Assembly is suitable for use in both existing and new zip line installations. Setup information contained within this manual relates only to the zipSTOP Brake Assembly – The design, installation and set up of other components comprising the complete braking system is the responsibility of the installer and/or operator.


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.


As there are infinite possibilities regarding participant weights and arrival speeds, line slopes and environmental conditions, a safe and functional installation can only be achieved after careful consideration of all factors in advance of the zipSTOP installation.


6.2 Setup Variables
A number of variables will influence the final braking distance and level of rider comfort, these include:


  • Rider arrival speed
  • Rider weight
  • Reduction Line Ratio
  • Zip line slope in the landing area
  • System friction
  • Environmental conditions (wind, rain, temperature)


6.3 Rider Arrival Speed
Rider arrival speed is unique to each zip line installation and is a factor of line slope, zip line length, rider weight, rider descent position, wind and friction. It is necessary to know the acceptable minimum and maximum rider velocities prior to configuring the zipSTOP.


6.4 Rider Weight
Suitable rider weight ranges will need to be determined by individual zip line operators. The zipSTOP Brake unit will accommodate riders between 15 and 150 kg (33 and 330 lbs). It is necessary to know the acceptable rider weight range before configuring the zipSTOP.


6.5 Reduction Line Ratio
The Reduction Ratio is the most influential factor in the braking characteristics of the zipSTOP The Reduction Ratio is the difference between zipSTOP Braking Line extension and the Brake Trolley travel. The Reduction Ratio is achieved by passing the Reduction Line around a series of pulleys. This alters the ratio of Brake Trolley travel to Braking Line extension, allowing the installer to tailor the braking distances and deceleration rates, to accommodate a wide range of arrival speeds and rider weights.


Various Reduction Ratios are possible:
        • 1:1 Ratio
        • 2:1 Ratio
        • 3:1 and higher ratios  – contact us at (877) 206-8967 for more information


Systems shown are based on a single line zip line. Dual zip lines and side-by-side systems may also be accommodated. Please contact us directly  on alternate set-ups. When higher Reduction Ratios are employed retraction force is reduced and a manual reset of the Brake Trolley may be necessary.


1:1 Zipline Brake Ratio Sample Installation

The 1:1 Reduction Ratio directly connects the zipSTOP Brake Unit to the zipSTOP Brake Trolley via a single Type I Redirection Pulley. For every unit of Brake Trolley travel, the Braking Line extends an equal distance.


Characteristics of the 1:1 ratio are:


  • Suitable for low speeds
  • Strongest braking force
  • Short braking distances
  • Higher rate of rider deceleration
  • Maximum rider approach speed of 36 kph (22 mph)


A 1:1 Reduction Ratio is used for zip line installations where low arrival speeds are common. Although suitable for speeds up to 36 kph (22 mph), typically a 1:1 ratio would be employed when approach speeds are less than 20 kph (12 mph).




2:1 Zipline Brake Ratio Sample Installation


The 2:1 Reduction Ratio connects the zipSTOP Brake Unit to the ZipSTOP Brake Trolley via both Type I and Type II pulleys. With a 2:1 ratio the Brake Trolley travels twice the distance that the zipSTOP Braking Line extends.

Characteristics of the 2:1 ratio are:

  • Suitable for medium to high speeds
  • Best combination of stopping distance and braking force
  • Optimum rider comfort
  • Longer braking distances than a 1:1 setup
  • Overhead support line recommended
  • Maximum approach speed of 60 kph (36 mph)

A 2:1 Ratio is used on zip line installations where medium to high approach speeds are common but a soft stop for the rider is desired. Although suitable for approach speeds up to 60 kph (36 mph), typically a 2:1 ratio is employed when approach speeds are less than 40 kph (24 mph).



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