- CYPRES 2 User’s Guide -
page 3
1. Function
1.1 Design philosophy
CYPRES, which is the acronym of „CYbernetic
Parachute RElease System“, is an automatic activa-
tion device which meets all needs, requirements,
and desires of today‘s skydivers.
The operation is easy: If you jump from your DZ
into your DZ just switch it on prior to the first jump
of the day. It is not necessary to switch it off, be
-
cause CYPRES will do this itself. (See chapter 4.3)
The weather is constantly checked by CYPRES
over the day by measuring the air pressure twice
a minute. This means that the unit is always cali-
brated to the precise ground level.
The various CYPRES model parameters have been
chosen to cover the needs of the vast majority of
skydivers, and also not to restrict them during
common skydiving operations. More than 123
Million jumps since 1991 have proven the proper
design of these parameters. (Special activities may
require special consideration or CYPRES settings.)
High vertical speed at a low altitude causes
CYPRES to take action. (For Expert model 35
meter per second, which is approx. 70% of typical
freefall speed.)
The CYPRES family of AAD‘s work with remark
-
able reliability. To date CYPRES units have saved
the lives of more than 4000 skydivers, without a
single unit ever refusing to activate and cut through
the loop when the conditions were met.
CYPRES is surely the most reliable piece of sky-
diving equipment ever produced.
CYPRES is not able to open your reserve. It is only
intended to sever your reserve closing loop. CYPRES
is strictly a backup device and does not replace proper
training or timely execution of emergency procedures.
It may display a wrong status, fail whenever and for
whatever reason and may cause injury or death. If you
are not comfortable with these risks you must not use
CYPRES. You must make sure that the loop passes
through the cutter’s passing hole. If you loan, rent or
sell your CYPRES to somebody it is your responsibility
to inform him about the above circumstances.
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