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MIL-T-82570A(OS)
condition, attempt to manually and electrically fire the tube.  The tube shall
not fire and there shall be no loss of pressure in the breech mechanism.
4.4.5.20.5 Pressure switch operation.  During the dry firing tests verify
that the pressure switch condition is in accordance with Schedule I when the
control valve operating lever is in the READY condition.
4.4.5.20.6 Breakaway plug mechanism.  The breakaway plug mechanism shall
permit firing when latched in the breechward position and shall remain in
the latched position at the completion of the firing.
4.4.5.20.7  Observation for damage.  At the completion of the dry firing
tests there shall be no damage sustained by the torpedo tube assembly.
4.4.5.21 Continuity.
Continuity shall be in accordance with the applicable
schematic diagram.
4.4..5.22 Lanyard retainer (breechward access opening location). The
lanyard retainer plunger shall be depressed by hand and a loop of 0.069
minimum diameter wire shall be assembled to the retainer.
4.4.5.22.1 The plungers shall depress easily by hand pressure.
4.4.5.22.2 The retainers shall accept and secure the loop of 0.069 minimum
diameter wire.
x
4.4.5.23 Torpedo exit velocity
The two photoelectric control units (4.4.4.21) shall be spaced three feet
apart alongside the track or ramp.  The first set of cells shall be located
the length of the torpedo plus or minus 0.5 foot from the muzzle end of the
barrel.  The photoelectric cells shall be attached to the electronic counter
(4.4.4.22) so that when the first beam is broken by the nose of the torpedo
the counter starts and when the second beam is broken by the nose of the
torpedo, the counter stops.  The average velocity shall then be calculated
by the formula V =d/t where d = distance in feet, V= average velocity, and
t = time in seconds.  Each breech mechanism shall be charged at a rate not
exceeding 250 psig per minute.  The breech mechanism shall be charged to a
pressure of 200 psi greater than those pressures specified in Schedule 11
and allowed to cool for at least 5 minutes prior to being bled and readied
for a firing in accordance with Schedule II.  The minimum exit velocity shall
be met in all firings.
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