Cypress 2 - 2.3 How to Handle in Practical Use

- Smoke Jumper CYPRES 2 User’s Guide - page 11
2.3 How to handle in practical use
Aside the operativeness check prior to the rst
jump of the day the sole action required for the
Smoke Jumper CYPRES 2 is only necessary on
the jumprun. Prior to exit, a handle on the main lift
web must be separated from its velcro and pulled
downward for at least 10 centimetres. (To conrm
this action a “0” will be displayed in the control
unit window) The Smoke Jumper CYPRES 2
will now initiate the active mode and monitors
the situation. If it detects that the Smoke Jumper
has left the plane and has fallen to approximately
1.200 feet AGL with a vertical speed higher than
35 meters per second (that is 78 mph), then it will
cut the reserve containers closing loop to initiate
the deployment sequence. The Smoke Jumper
CYPRES 2 will initiate the deployment sequence
of the reserve container even lower, down to ap-
proximately 400 feet AGL, if the vertical speed
has not exceeded 35 meters per second at 1.200
feet AGL, but only later. These calculations as-
sume that the the arming handle was pulled at ap-
proximately 3.000 feet above ground.
Activation window
· Arm the unit on jumprun at approx.
3.000 feet AGL
· Activation window starts at approx.
minus 1.800 feet from jumprun
· Activation window ends at approx.
minus 2.600 feet from jumprun
If the arming handle is pulled at another height
above ground: the activation should happen at ap-
prox. 1.800 to approx. 2.600 feet below this spe-
cic arming altitude if the activation conditions
are given.
Once the handle has been pulled the unit is in ac-
tive mode right away.