MILITARY CYPRES USER'S GUIDE
Airtec GmbH
Page 43
8.
Repacking of Reserves
General information:
At every repack the loops must be checked carefully and be replaced if necessary.
Grommets
Grommets with rough edges ultimately will destroy any loop. Replace damaged
grommets immediately.
Reserve loops
The reserve loop must be placed under a tension factor of at least 5 kg once the
reserve has been packed. The loop material has a maximum extensibility of 7.5 percent.
Maximum extensibility is the length to which the material can be stretched before it
will break.
By contrast, the maximum extensibility of Kevlar material, which is considered to be
quite rigid, is 5.2 percent.
We recommend that you pull on the loop twice, as firmly as possible, prior to installation.
The elongation of the loop after installation should not exceed 3 millimeters in the
case of a one-pin container, and 6.5 millimeters in the case of a two-pin container.
The loop material has a diameter of approx. 1.6 millimeters and a tensile strength of
approx. 180 kp. The threaded area (where the loop is pulled through itself) has a
higher tensile strength.
Because both the loop and the pull-up material consist of polyethylene, all actions
which might build up excessive heat by friction should be avoided. Otherwise, the
material will loose some tensile strength at temperatures above 100 degrees Centigrade
(C°), and might even melt in extreme cases. Such stress can be put on the loop when
the pull-up is passed through the loop or pulled out after packing is completed.
! Therefore, be sure to extract the pull-up only
from below
the ripcord pins !
and only
very slowly
.
The looped end of the CYPRES loop should be impregnated with silicone except
for 1/2" next to the disc.
Ready-made loops provided by Airtec have already been
treated with silicone the first 2".
Running loops should be impregnated completely.
Generous treatment of CYPRES loops with silicone
is improving the reserve container opening considerably.
