TM 9-1375-213-12
wide tape (e.g. 2 inch wide PPP-T-60
e. Additional Priming Procedures for the new 40
tape) to secure cord/fuse to top of
pound cratering charges.
charge. This will prevent kinking of
the fuse/cord where it exits the priming
NOTE
tunnel.
Priming is DIFFERENT for each genera-
(b) Detonating cord priming of this
tion charge.
charge requiresuse of a Uli knot
(see fig. 2-25) secured tightly to
(1) FIRST GENERATION (NSN 1375-
the top (flat) surface of the
01-250-6029). Because the booster is placed at
charge and bent so it is close to
the top of the charge in the first generation
the internal A-5 booster. Pass
cratering charges, the priming tunnels are now
the free end of the detonating
located there (see fig. 1-7.2).
cord through the smaller prim-
ing tunnel (see fig. 2-25.1) from
(a) Blasting cap priming is basically
the outside edge and pull about
the same as done with the older
two feet of cord through the tun-
version charge. To prime: Place
nel. Tie a Uli knot with at least
the cap in the longer, closed-end
ten turns in this end of the cord
tunnel and secure it by wrapping
and pull the cord back through
the wires (electric cap) around
the tunnel to secure the knot
the wire-securing post or taping
against the clip. Bend the knot
down the detonating cord or fuse
so it curves with the 3-1/2 inch
(nonelectric cap). If tape is not
available or will not adhere
diameter round shape of the
booster centered beneath the sur-
because the charge is damp or
face and position it flat against
cold, wrap a piece of twine
the top surface of the charge (see
wrapped around the fuse/cord
and the wire-securing post, but
the surface of the charge with
do NOT tie it too tightly around
tape (e.g. PPP-T-60). Some other
time fuse - it could snuff out the
method such as use of a piece of
burning of the fuse. Use several
twine or wire is required at tem-
wraps o f twine around the
peratures below 40F or if the sur-
core/fuse to get a secure grip with-
face of the charge is damp.
out squeezing it too tightly.
Securely tie the twine, etc.
between the far end of the han-
dle bracket (beneath the bent
CAUTION
end of the lifting handle) and the
securing post and the loop in the
AN OVERHAND KNOT IN A SINGLE
P A S S OF DETONATING CORD
end of the Uli knot to hold the
knot in place (see fig. 2-25.2).
THE
DETONATING
THROUGH
The knot MUST be kept in tight
CORD TUNNEL WILL NOT GIVE
contact with the charge to func-
ASSURED DETONATION OF THE
tion properly.
FIRST
GENERATION
40-POUND
CRATERING CHARGE. A ULI KNOT
(WITH A MINIMUM OF TEN TURNS)
NOTE
MUST BE TIED TIGHTLY IN THE
The booster end of a detonating cord
END OF DETONATING CORD USED
priming assembly f r o m an M183
FOR PRIMING THE CHARGE AND
Charge Assembly (Satchel Charge) may
THE KNOT MUST BE BENT TO
be used in place of the Uli knot in both
CONFORM WITH THE SHAPE OF
the above and following procedures.
THE BOOSTER AND KEPT IN
The booster is simply secured in the
TIGHT CONTACT WITH SURFACE
blasting cap tunnel. Cutting the prim-
OF THE CHARGE OVER THE
ing assembly in half will give two
BOOSTER.
lengths of detonating cord with an
attached booster which may be easily
NOTE
spliced to the lead-in detonating cords
with square knots in the standard man-
Where detonating cord or time fuse is
being used with a cratering charge to
ner (see fig. 2-14).
be lowered into a hole, use a piece of
2-24 Change 16
