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|  MIL-T-18404(NOrd)
4.4.2 Shock test procedures.
4.4.2.1 Mountin - The torpedo shall be mounted on the shock testing
table to simulate as realistically as possible the service installation in-
cluding vibration isolators or mounting devices, if any, as specified in the
individual specification.
4.4.2.2 Direction of tests. - The shock tests shall be conducted along
the axes defined in 3.1.14 and in the following directions:
a, inertia load forward: transportation water entry after
(a) axis
deck
launching, and water entry after air launching.
(b) Axis
a, inertia load aft: transportation, and water entry after
deck
launching.
b and C, both directions: transportation, water entry after
(c) Axes
deck
launching, and water entry after air launching.
4.4.2.3 Torpe do non-operating, ready non-operating, ready or operating.
The torpedo shall be subject to 3 shock pulses in each of the applicable
direction specified in 4.4.2.2 (total of 18 shock pulses). The shock pulse
will be as follows:
(a) Transposition and water entry after deck launching: 60g 6g peak
magnitude not les than 8 ms pulse duration, and approximating a
one-half sine wave, or the test procedures defined in MIL-S-901 for
medium-weight equipment.
(b) Water entry after air launching with external attachments; 150g + 15g
peak magnitude, not less than 8 ms pulse duration, and approximating
a one-half sine wave.
(c) Water entry after air launching without external attachments; 250g
25g peak magnitude, not less than 8 ms pulse duration, and approxi-
mating a one-half sine wave.
4.4.3 Acceleration
steady state
test procedure.
4.4.3.1 Mounting. - The torpedo shall be mounted on the testing device
to simulate as realistically as possible the service installation Including
shock isolators or mounting devices, if any, as specified in the individual
specification.
4.4.3.2 Direction of test. - Acceleration (steady state) tests shall be
conducted along the axes specified in 3.1.14 and in the following directions:
(a) Axis a, inertia load forward: arrested landing and parachute opening.
(b) Axis a, inertia load aft: catapult launched, tube launched, and
booster launched.
(c) Axes b and c, inertia load both directions: rack launched, catapult
launched, arrested landing, and parachute opening.
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