Air TEc Expert CYPRES 2 User manual
User‘s Guide
CYPRES 2
Reliability made in Germany
Aircrew CYPRES 2
- Aircrew CYPRES 2 User’s Guide - page 1
Aircrew CYPRES 2
User’s Guide
- English version -
Congratulations on choosing CYPRES 2, without
doubt the safest and most accurate AAD ever
produced.
Like most airmen, you probably assume that you
will always have time to deploy your canopy
yourself and that situations requiring the use of an
automatic activation device will always happen
to others. We do hope you can avoid such trouble
and that your CYPRES 2 will never have to take
action to save your life. Nevertheless, situations
requiring the activation of CYPRES 2 can hap-
pen to any parachutist, no matter how careful and
experienced. Should CYPRES 2 ever decide to
initiate your reserve opening, you will know that
you have not left your safety to chance.
Airtec GmbH & Co. KG Safety Systems
Dieses Handbuch ist in Deutsch erhältlich.
Este manual está disponible en español.
CYPRES 2 User’s Guide
- english version -
CYPRES 2
Reliability made in Germany
This English user‘s guide is the original us-
er‘s guide. It will not be further processed. The ac-
tual version of the manual can be downloaded at
www.militarycypres.cc The latest revision is applicable
for all herein mentioned CYPRES 2 models only and
replaces and supercedes all previous applicable revi-
sions*. See www.militarycypres.cc to verify / obtain
the latest revision. Subject to change without notice.
Aircrew CYPRES 2 User Guide as revised 11/2021 Art.
No. 991013.
*If your CYPRES does not have the latest upgrades / updates
installed it is possible that your unit does not have all options
available, which are stated in the newest English user’s guide.
page 2 - Aircrew CYPRES 2 User’s Guide -
Contents
1. Function .........................................................4
1.1 How the Aircrew CYPRES 2 works .............4
1.2 Components ..................................................6
1.3 Power supply.................................................7
2. How to handle the Aircrew CYPRES 2 .......8
2.1 How to use it .................................................8
2.1.1 Selectable activation altitude ...................10
2.2 How to check the operativeness..................12
2.3 Access to unit information ..........................13
2.4 Water contact...............................................14
3. Installation .................................................15
4. Error display .............................................17
5. Changing the release unit(s) .....................18
6. Technical servicing/maintenance .............20
6.1 Maintenance reminder ...........................21
6.2 Timing of maintenance ...............................22
7. Important notes for users...........................23
8. Rigging/Parachute Issues ...........................24
9. Air travel ....................................................26
10. Technical Data ...........................................27
11. Warranty ..................................................28
12. Disclaimer ................................................29
13. Index...........................................................30
14. Packing List ...............................................31
Trademarks ..................................................31
- Aircrew CYPRES 2 User’s Guide - page 3
What an Aircrew CYPRES 2 is
The Aircrew CYPRES 2 is an Automatic Activation Device for the needs of the sta
of an aircraft.
It initiates the opening of the emergency parachute, if an airman has bailed out from
his aircraft, is below activation altitude (see chapter 2.1.1) and has a vertical speed
of more than 35 meters per second (that equivalents approx. 6.900 feet per minute).
The Aircrew CYPRES 2 does its job by severing the closing loop allowing the spring
loaded pilotchute to push away the aps of the container and to jump out into the
airstream and initiate the canopy opening.
CYPRES is truly the most reliable piece of skydiving equipment ever produced.
CYPRES is not able to open your parachute container. 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.
page 4 - Aircrew CYPRES 2 User’s Guide -
1. Function
1.1 How the Aircrew CYPRES 2 works
The processing unit contains a factory-pro-
grammed microprocessor that is capable of real-
time calculations of the airman‘s altitude and rate
of descent based on barometric pressure.
By monitoring this data, certain criteria are gener-
ated from which conclusions are drawn. Should
the conclusion be that the airman is lower than
activation altitude and in freefall, the processing
unit triggers the release unit to initiate the opening
of the reserve parachute container.
The release unit (cutter) system for the canopy
container is completely independent of the rig‘s
primary system. It does not pull the ripcord pin out
of the closing loop, but rather cuts the loop inside
the canopy container to release the pilot chute.
Opening a canopy container by severing the clos-
ing loop is a method invented and patented by the
founder of Airtec, Helmut Cloth, in 1987.
The CYPRES‘ canopy activation system has these
advantages:
• The canopy container can be opened in two dif-
ferent ways. One method is used by the airman
pulling the ripcord handle. The other method is
used by CYPRES when it cuts the closing loop.
• Mechanical components are reduced to a single
movable piston in the release unit.
• The activation system is located inside the
canopy container where it is not exposed to
excessive shock or other adverse inuences.
• The system is unobtrusive and can be installed
so that it is undetectable from the outside.
- Aircrew CYPRES 2 User’s Guide - page 5
The distance which the piston moves in case of an
activation is approx. 5 mm.
The release unit (cutter) is completely self-con-
tained and specically developed for CYPRES.
In the event of activation, nothing escapes or is
expelled.
During an 18 month long investigation by BAM
(Bundesanstalt für Materialprüfung), Berlin, 99
release units were tested. The result is that BAM
and the U.S. DOT have classied the CYPRES as
being non-hazardous.
Due to its high reliability and other properties, the
CYPRES release unit is currently being used in
aerospace applications (satellites).
Release unit (cutter) with elastic keeper
Functional diagram:
container
closing
loop
blade plastic guide
stainless
steel body
page 6 - Aircrew CYPRES 2 User’s Guide -
1.2 Components
The Aircrew CYPRES 2 consists of a control unit,
a processing unit with the attached release handle
cable housing and one release unit (cutter) for a
1-pin canopy container or two release units (cut-
ters) for a 2-pin canopy container.
release unit
(cutter)
processing unit
control unit
arming by static line
manual arming
by slider
Do not pull, lift, carry or throw CYPRES by the cables
SAFETY INSTRUCTIONS
- Aircrew CYPRES 2 User’s Guide - page 7
1.3 Power supply
No user attention should be needed for the power supply of CYPRES 2.
The unit should function from the date of manufacture (DOM) until the end of its service life.
If CYPRES 2 ceases to function or displays an error code during the self-test please contact
Airtec or SSK.
No CYPRES 2 user has
ever had to pay for a
battery since 2003, pro-
vided that the mainte-
nance intervals have
been adhered to.
page 8 - Aircrew CYPRES 2 User’s Guide -
level. These two parameters have to be fullled
to make the unit activate. After arming, the unit
stays on for 14 hours or until the cable is pushed
back in again.
When the arming cable is inserted, the unit is
off (disarmed). In this condition the Aircrew
CYPRES 2 will not interfere with all possible ight
scenarios or pressure chamber situations.
2. How to handle the Aircrew CYPRES 2
2.1 How to use it
The Aircrew CYPRES 2 is dedicated to assist an
airman in the emergency situation after a bail out
from his aircraft or an unintentional fall out of the
aircraft (working at open tailgate etc). The primary
action for the airman is to pull the ripcord handle of
the emergency parachute. If this should not be pos-
sible for whatever reason, the Aircrew CYPRES 2
can step in and help.
The operation method of the Aircrew CYPRES 2
is very safe and simple. It‘s only armed when the
arming cable is pulled out. In this condition it will
permanently monitor the situation and initiate the
canopy opening in case it detects a vertical speed
higher than 35m/s (6.900 ft/min) below the selected
activation altitude (see chapter 2.1.1) above sea
arming by static line
manual arming by slider
ON OFF
Always check the operativeness of the Aircrew
CYPRES2 prior to the rst action of the day:
Perform a self-test. Do it on the ground before
boarding.
SAFETY INSTRUCTIONS
- Aircrew CYPRES 2 User’s Guide - page 9
2. static line (for pilots or airmen who are perma-
nently seated).
The emergency parachute is equipped with a static
line at the end of the arming cable. The static line
is connected by a shackle with the seat (or other
suitable spots). It has to be connected when the
pilot takes seat. The arming cable stays inserted
completely and the static line stays connected all
times during ight. In case of an emergency bail
out, the static line will automatically arm the Air-
crew CYPRES 2 by pulling out the arming cable.
The Aircrew CYPRES 2 can be operated in two
dierent ways:
1. manual arming by handle (airmen working in the
plane at the door or open tailgate etc).
The emergency parachute is equipped with a
manual handle at the end of the arming cable. When
the situation requires an arming of the Aircrew
CYPRES 2 (tailgate opening, upcoming work at
open door), this handle has to be pulled at least 5
centimeters out of the
cable housing. Now
the unit is armed. This
is indicated by a „0“
in the display. When
the work is finished
(no further protection
needed) the arming
cable has to be pushed
back into the housing
to switch the unit o
(display goes blank).
The unit is now dis-
armed again.
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