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8.5.2 2:1 RATIO
Attach zipSTOP braking line to
redirection line with a quicklink and
recommended swivel, support pulley
The 2:1 Redirection 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:
ƒ Suitable for medium to high speeds
ƒ Optimal combination of stopping distance, braking force and reliability in reset
ƒ Optimum rider comfort
ƒ Longer braking distances than a 1:1 setup
ƒ Overhead support line (redirection point) recommended
ƒ Maximum approach speed of 60 km/h (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 km/h (36 mph), typically a 2:1
ratio is employed when approach speeds are less than 40 km/h (24 mph).
A 2:1 Ratio is specifically PROHIBITED in any installation of the ZSIR150-20A. Utilizing an external redirection
will lead to potentially dangerous and harmful braking dynamics.
ZSIR150-20A - THIS PRODUCT CAN ONLY BE USED WITH 1:1 REDIRECTION SETUPS
The zipSTOP IR (ZSIR150-20A) is NOT compatible with external redirection setups in any way. Installing
a redirection setup with the zipSTOP IR can create a very dangerous set of braking conditions that could
result in abnormally abrupt late braking.
www.headrushtech.com
and sling
Brake Trolley
*EAD not shown but it is mandated*
Overhead Cable – 2:1 Redirection Ratio
|
+1-720-565-6885
Attach redirection pulley
to overhead line
25
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