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|  MIL-T-82570A(OS)
be permitted to continue if in the opinion of the test engineer it is deemed
unsafe. While conducting any of the firings, personnel shall stand clear of
the breechward access opening and breech mechanism. Charging lines should
be secured with safety chains when high pressure air charging operations are
in progress.
For the purpose of this specification the following
3.3 Definitions.
definitions are applicable:
The launching device in its assembled state.
3.3.1 Torpedo tube assembly.
3.3.2 Nonoperating condition. The condition of the tube when assembled,
prepared, issued, transported, and handled.
3.3.3 Loaded condition. That condition when a torpedo or dummy is
installed in the tube barrel, secured in place by the securing mechanism,
and the breech mechanism and muzzle covers are installed.
3.3.4 Latched position of the breakaway plug puller mechanism. The break-
away plug puller mechanism is latched when the latch is in the breechward
position.
3.4 Performance requirements and product characteristics. Torpedo Tubes
MK 32 Mod 5 and Mk 32 Mod 7 shall meet the following performance requirements
and product characteristics:
3.4.1 Hydrostatic pressure (breech mechanisms). The breech mechanisms
shall withstand a hydrostatic pressure of 4500 plus 20 minus O psig without
.
failure of any part.
3.4.2 Pneumatic system pressure drop. The pneumatic system of each barrel
of the torpedo tube, minus the breech mechanism, shall be attached to a
2000 psi air source through a 0.024 inch diameter orifice. With the securing
mechanism removed and the manifold nipple blanked off, the pressure in the
pneumatic system of each barrel shall stabilize at 1350 psig minimum. With
the securing mechanism installed, the pressure shall stabilize at 750 psig
minimum. At the completion of this test there shall be no deformation or
failure of any part of the pneumatic system.
3.4.3 Breech mechanism air loss. After being initially charged to a pres-
sure of 2000 plus or minus 50 psig, allowed to cool for 2 hours, and then
bled down to 1600 plus or minus 10 psig, none of the three breech mechanisms
shall lose more than 5 percent air pressure, due to leakage, over a 24-hour
period.
3.4.4 Bore size of barrel. Each barrel shall pass a "GO" gage (NAVSEA
Dwg 2320787) with an axial force not to exceed 150 pounds.
5
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