1、 - MIL-T-8257LA LO 7777906 O362067 5 MIL-T -8 25 7 1A (OS ) 31 January 1975 Superseding 8 January 1969 MIL -T -825 7 1 (OS ) MILITARY SPECIFICATION TORPEDO TUBE, SURFACE VESSEL, MARK 32 MOD 9 (For Torpedoes Mk 44 Mod 1 and 46 Mod 1) This specification is approved for use by all Depart- ments and Age
2、ncies of the Department of Defense. 1. SCOPE -.- Jn 1.1 This specification establishes the requirements for the procurement of Surface Vessel Torpedo Tube Mk 32 Mod 9 (NAVORD LD 621171). 2. APPLICABLE DOCUMENTS * 2.1 The following documents of the issue in effect on the date of invitation for bids o
3、r request for proposals form a part of this spec- ification to the extent specified herein. SPECIFICATIONS Mi 1 it ary MIL- C - 104 Crates, Wood; Lumber and Plywood Sheathed, Nailed and Bolted MIL-P-116 Preservation-Packaging Methods of MIL- s - 901 Shock Tests, H. I. (High-Impact); Shipboard Machin
4、ery, Equipment and Systems; Requirements for I. *b MIL- C - 16 173 Corrosion .Preventive Compound, Solvent Cutback, Cold Application I FSC 1045 TH IS DOC UM ENT CC NTA I N s,.-PAGEs / Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T -8 25 7 1A (
5、OS ) STANDARDS Military MIL-STD-129 Marking for Shipment and Storage MIL- STD - 167 Mechanical Vibrations of Shipboard Equipment MIL-STD-810 Environmental Test Methods DRAWINGS Naval Sea Systems Command (Code Ident 10001) NAVORD LD 621171 Torpedo Tube, Surface Vessel, Mk 32 Mod 9 (Assembly), Index t
6、o lists of Drawings NAVORD LJI 621172 Torpedo Tube, Surface Vessel, Mk 32 Mod 9 Assembly NAVORD Dwg 1448409 Torpedo Tube, Surface Vessel, Mk 32 Mod 9 Assembly NAVORD Dwg 1448418 Torpedo Tube, Surface Vessel, Mk 32 Mod 9, Electrical Schematic NAVORD Dwg 1448449 Torpedo Tube, Surface Vessel, Mk 32 Mod
7、 9, Electrical Schematic, External NAVORD Dwg 1623922 Pressure Gage a NAVORD Dwg 1984119 Dummy Torpedo Mk 44 Mod 1 NAVORD Dwg 2320787. “GO“ Gage, Barrel (Assembly) Torpedo Tube, Surface Vessel, Mk 32 Mods O through 9 NAVORD Dwg 2652289 Dumy Torpedo Mk 46 Mod 1 NAVORD Dwg 3245120 Pressure Fitting Ada
8、pter (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer . ) 2 Provided by IHSNot for ResaleNo reproduction or networking pe
9、rmitted without license from IHS-,-,-NIL-T-8257LA LO 7997906 0362069 9 H MIL-T-82571A( OS) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. the issue in effect on date of invitation for bids or request for proposals shall apply. Unless
10、 otherwise indicated, National Bureau of Standards Publications Handbook H28 Screw-niread Standards for the Federal Services (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, DC 20402.) 3, REQUIREMENTS 3.1 Description. Torpedo Tub
11、e Assembly Mk 32 Mod 9 is a stationary, pneumatic launching device capable of receiving, stowing, and launching Torpedoes Mk 44 and Mk 46. The tube assembly consists of two parallel bar- rels (Mk 10 Mods 10 and il), one mounted above the other; four interchange- able breech mechanisms (Mk 1 Mod 1);
12、and torpedo securing mechanisms. Each barrel iscapable of being made ready to fire, fired, and returned to the safe or standby condition electrically .from a remote location or manually at the tube. During manual firing a latch plate is swung open to provide automatic switching from normal to emerge
13、ncy gyro squib fire power and also to provide access to the firing solenoid plunger. nie tube is equipped withanelectrical junction box mounted on the left side of the barrel when viewed from the breech end. from the fire control system and transmits them via electrical cabling to each barrel-housed
14、 torpedo. It also transmits the remote, safe, readying, and firing commands to the tubes and connects the electrical circuitry to the muzzle door heating units. Each muzzle door is pneumatically operated by ships low pressure air and can be controlled remotely by electrical means or manually at the
15、tube. A flexible charging hose is also suppl-ied with the tube and is mounted on the deck house wall. The junction box receives presetting functions 3.2 General requirements 3.2.1 Preproduction samples. Unless otherwise specified in the contract or order, a preproduction sample of Torpedo Tube Assem
16、bly Mk 32 Mod 9 shall be manufactured using the methods and procedures proposed for production. The sample will be tested as specified in Section 4 herein and is for the purpose of determining, prior to production, that the contractors production methods are capable of producing an item that meets t
17、he requirements of this specification and the design . ,. (See 6.2) 3.2.2 Materials. Unless otherwise specified in the contract, requisition, or order, all materials and purchased parts entering into the final assembly of Torpedo TubeMk 32 Mod 9 shall conform strictly to the detailed require- ments
18、indicated on the drawings and specifications listed in NAVORD LD 621172. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-82571A 10 9 7777706 03b2070 5 MIL - T - 8 2 5 7 1A (OS ) _ i- . _C. - -. 3.2.3 Finishes, coatings, construction, and dime
19、nsions. Finishes, coat- ings, construction, and dimensions of Torpedo Tube Mk 32 Mod 9 shall be strictly in accordance with the applicable drawings, specifications, and publications listed in NAVORD LD 621172. * 3.2.4 Moisture, fungus, and corrosion. Torpedo Tube Mk 32 Mod 9 shall be rendered moistu
20、re, fungus, and corrosion resistant in accordance with detail requirements specified in the drawings and specifications listed in NAVORD LD 621172. 3.2.5 Marking. Marking of assemblies, subassemblies, and parts shall be in accordance with the applicable drawings listed in NAVORD LD 621172. * 3.2.6 T
21、hreads. Unless otherwise specified, all threads shall be in ac- cordance with National Bureau of Standards Handbook H28. The class or fit for threads shall be as specified on the applicable drawings. * 3.2.7 Conflicting requirements. In the event of conflict between the documents referenced herein a
22、nd the contents of this specification, the con- tents of this specification shall apply. 3.2.8 Safety precautlons. All standard safety precautions for high pres- sure air shall be strictly observed. No test shall be permitted to continue if in the opinion of the test engineer it is deemed unsafe. in
23、g any of the firings, personnel shall stand clear of the breechward access opening and breech mechanism. chains when high pressure air charging operations are in progress. While conduct- Charging lines should be secured with safety 3.3 Definitions. For the purpose of this specification the following
24、 definitions apply : 3.3.1 Torpedo tube assembly. The launching device in its assembled state. 3.3.2 Nonoperating condition. The condition of the tube when assembled, prepared, issued, transported, and handled. 3.3.3 Safe condition. The condition of the barrel assembly when the lever of the control
25、valve operating mechanism is in the muzzleward posi- tion,the latch over the manual fire button of the solenoid valve is up and locked in position, and the muzzle door is closed and the manual knob linkage handle above the safe-ready solenoid valves is in the REMOTE position, as indicated on the sup
26、port bracket. 3.3.4 Ready condition. That coridition when the charged breech is in- stalled and locked in position, the breakaway plug is mated to the torpedo, the breechward access cover is secured, and the muzzle door is open. lever of the control valve operating mechanism is in the breechward pos
27、ition. The 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-8257LA LO m 9779906 03b207L 7 I ci . :-e 3 i i MIL-T-82571A (OS) 3.3.5 Loaded condition. The condition of the tube when weapons are in- stalled in the barrels. 3.4 Performance requir
28、ements and product characteristics. Torpedo Tube Assembly Mk 32 Mod 9 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 failur
29、e of any part. * 3.4.2 High pressure pneumatic system pressure drop. The pneumatic system of each barrel of the torpedo tube, minus the breech mechanism, shall be at- tached to a 2000 psi air source through a 0.024 inch diameter orifice. With the securing mechanism removed and the manifold nipple bl
30、anked off, the pres- sure in the pneumatic system of each barrel shall stabilize at 1350 psig min- imum. With the securing mechanism installed, the pressure shall stabilize at 750 psig minimum. At the completion of this test there shall be no defor- mation or failure of any part of the pneumatic sys
31、tem. 3.4.3 Hydrostatic pressure, low pressure pneumatic.system. The low-pressure pneumatic system of each barrel shall withstand a hydrostatic pressure of 225 psig without failure of any part. 3.4.4 Breech mechanism air loss. When the four breech mechanisms are initially charged to 2000 psig, allowe
32、d to cool, and are then bled down to 1600 plus or minus 10 psig, the air loss shall, after 24 hours, not exceed 5 per- cent air pressure. ;k 3.4.5 Bore size of barrel. Each barrel shall pass a “GO“ gage (NAVORD Dwg 2320787) with an axial force not to exceed 150 pounds. 3.4.6 Electrical circuitry. Ci
33、rcuitry shall be in accordance with NAVOD Drawing 1448418. * 3.4.7 Dielectric strength. Electrical circuitry of the tube, with the exception of the muzzle door heater circuit, shall withstand the application of a 1000 volt ac potential between mutually insulated terminals and ground for one minute m
34、inimum without insulation breakdown. The applied rate shall not exceed 500 volts/second. The muzzle door heater circuit shall withstand the application of a 500 volt ac potential between input leads and ground for one minute minimum without insulation breakdown. * 3.4.8 Insulation resistance. Immedi
35、ately following the dielectric test, the insulationresistance between the hi-potted points in the muzzle door heater circuit shall be 1 megohm minimum at 500 volts dc, and in the remaining cir- cuitry it shall be 3 megohms minimum at 500 volts dc. * 3.4.9 Muzzle door heater operating current. The cu
36、rrent drawn by each muzzle door heater circuit shall not exceed 8.4 amperes. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-UIL-T-8257LA LO 7779906 Q362072 7 9 MIL-T-82571A (OS) * 3.4.10 Safe-ready solenoid operating current. The current drawn by
37、each safe-ready solenoid circuit shall not exceed 0.4 ampere continuous (0.52 ampere inrush). * 3.4.11 Firing solenoid operating current. The total current drawn by each firing solenoid shall not exceed 1.5 ampere continuous (1.95 inrush). * 3.4.12 Total operating current. When all electrical compon
38、ents of one barrel of the torpedo tube are operating (with the exception of torpedo squib firing), the total maximum current drain shall be 10.5 ampere at 115 plus or minus 0.5 volts ac input. * 3.4.13 Muzzle door heater resistance. The electrical resistance of each muzzle door heater circuit shall
39、be 14.4 plus 1.6 or minus 0.7 ohms. 3.4.14 Muzzle door seal test. With force applied axially from the lip of the door farthest removed from the hinge, the axial force required to open the muzzle door, when no air is supplied to the pneumatic system, shall be 20 plus or minus 12 pounds. 3.4.15 Squib
40、fire switch. When the,latch plate is lowered, the switch plunger moves out forcefully, opening the normal squib fire circuit and closing the emergency squib fire circuit. cuit automatically activates the course gyro in Torpedo Mk 46. Closing the emergency squib cir- 3.4.16 Ready light interlock circ
41、uits. The two ready light interlock circuits (one for each barrel, and each consisting of the muzzle door closed switch, ready light switch, and pressure switch) shall be given a continuity check during functional operation while the dry firing tests (4.4.5.22) and torpedo exit velocity tests (4.4.5
42、.23) are being performed. 3.4.16.1 Control box ready light switch. When the switch actuator plate on the control box is placed in the ON position, the ready light switch con- tacts for that individual circuit shall close. * 3.4.16.2 Pressure switch operation. The pressure switch contacts in each bar
43、rel shall close at 1275 plus or minus 75 psig and remain closed at pres- sures above this value. The pressure switch contacts shall open on falling pressure at 1275 plus or minus 75 psig and remain open at pressures below this value. * 3.4.16.3 Muzzle door ready light switch. When the muzzle door is
44、 fully open (3.4.18) under 95 plus or minus 5 psig pressure, the ready light switch in the muzzle door shall close. closes 6 degrees max from the fully open position. The switch shall open when the muzzle door 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
45、m IHS-,-,-MIL-T-8257LA LO W 7777906 0362073 O MIL-T -8 25 7 1A (OS) 3.4.17 Breakaway plug puller mechanism. The lever of the breakaway plug puller mechanism shall be capable of being latched and unlatched by hand. The mechanism shall permit dry firings when in the latched position and shall remain i
46、n the latched position at the completion of these firings. * 3.4.18 Muzzle door operation. With 95 plus or minus 5 psig supplied to the pneumatic circuit, and the doors operated manually and electrically, door closure shall be indicated by inability of a 0.030 feeler gage to pene- trate the joint be
47、tween the door face and the barrel ends. The full-open position of the door shall occur at 105 plus or minus 5 degrees. Door oper- ation of both barrels must be checked. 3.4.19 Lighting interlock. The lighting interlock circuit consists of two muzzle door interlocks, two breechward access cover inte
48、rlocks, and two breech mechanism locking handle interlocks. ation allow light leakage from the tube, the interior deck house lighting will shut off. Should any sequence of oper- 3.4.20 Electrical continuity. Continuity shall be in accordance with NAVORD Drawing 1448418. 3.4.21 Lanyard retainer. The
49、spring-loaded retainer shall be capable of accepting and securing a lanyard wire of 0.069 minimum diameter. 3.4.22 Dry firing. Each barrel of the torpedo tube assembly shall be capable of being fired without a torpedo by electrical and mechanical means, without damage, malfunction, or hindrance to subsequent firings with a torpedo. 3.4.23 Torpedo exit velocities. The exit velocities of each type of torpedo for various air flask pressures shall be in acc
