MILITARY CYPRES USER'S GUIDE
Page 4
Airtec GmbH
1.
Function
1.1
Design philosophy
The name "CYPRES" is an abbreviation of "Cybernetic Parachute Release System".
It is designed to open the reserve container five seconds before impact, after
everything else has failed. Once installed in a rig, it neither takes up much space, nor
is its weight worth mentioning. It is invisible and inaudible. Handling CYPRES does not
require any time-wasting motions at all, and verifying its function is quickly done and
simple.
The Military CYPRES family has the same basic function of the civilian versions, but
with an easier method to set altitude adjustments to accomodate the specific
needs of special application parachutes such as smoke jumpers, pilots, and military.
Switching the Military CYPRES on and doing an altitude adjustment, i.e. entering the
air pressure difference between setting point and drop zone manually, makes the unit
change to the special mode which provides extended operation possibilities for special
applications. The altitude adjustment is explained in one of the following chapters.
CYPRES is an invisible guardian for days, weeks and years. It is designed to open
your reserve container if your rate of descent is higher than 78 miles per hour (35
meters per second) at sea level as you pass through an altitude of approx. 1000 feet
above ground level. Also, if you are lower and descending at a rate of more than 78
mph (e.g. because of a low cutaway) or if CYPRES is working in special mode, if your
rate of descent is higher than two third of freefallspeed. CYPRES is designed to open
your reserve container down to 130 feet above ground level.
An activation speed of 78 mph (35 m/sec) at sea level or higher was chosen to ensure
that CYPRES does not restrict your possibilities under canopy. A fully open canopy,
even in a downplane, will not exceed a vertical descent speed of 78 mph. During
extensive test jumping in CYPRES' development, we never observed a vertical
descent speed higher than 69 mph (31 m/sec) once the canopy was fully open.