1、MIL-D-82687 13 777770b 0362596 T S-37-19 -, M IL-D-8 2 6 8 7 (OS) 23 January 1980 MILITAR Y SPEC IF IC AT10 N DEVICE, ARMING-FIRING, ROCKET MOTOR MARK 298 MOD 0 This specification is approved for use by the Naval Sea Systems Commarid, Department of the Navy, and is available for use by all Departmen
2、ts and Agen- cies of the Department of Defense. 1. SCOPE . 1.1 Scope. This specification establishes the perfomnce, design, developmnt, and test requirements for the EMK 298 MOD O Ebcket Motor Arming-Firing Device critical item, referred to herein as the A-F device. 2. APPLICABLE DOCUMENTS 2.1 Issue
3、s of documents, The following documents, of the exact issue shown and, where not shown, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. Beneficial conrnents (recomndations, additions, deletions) and any
4、pertinent data which may be of use in inproving this doemnt should be addressed to: Comnanding Officer, Naval Ordnance Station, Standardization/Documentation Division (591), Indian Head, hlD 20640, by using the self-addressed Standardization Document Proposal (DD Fomi 1426) appearing at the end of t
5、his document, or by letter. I I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-82687 13 W 7777706 0362577 I -. 5 . MIL-D-8 26 87( OS) c. . . SPECIFICATIONS MIL-F-7179 * M IL-B-7 8 8 3 M IL-E-8 18 9 MIL-W-8611 M 111-2 3 6 5 9 MU,-C-4 5 66 2 MIL
6、ITAR Y Naval Air Systems Command (Code Ident 30003) AS-5 503 W S-3 8 5 3 A WS-6536 Naval Sea Systems Command (Code Ident 53711) W S-18 84 6 Soldering Process, General Specifi- cation for. Finishes and Coatings: Protection of Aerospace Weapons Systems, Struc- tures and Parts; General Specification fo
7、r. Brazing of Steels, Copper, Copper Alloys, Nickel Alloys, Aluminum and Aluminum Alloys. Electronic Equipment, Missiles, Roosters and Allied Vehicles, General Specifi- cation for. Welding, Metal Arc and Gas, Steels and Corrosion and Heat Resistant Alloys, Processes for. Initiators, Electric, Genera
8、l Design Specification for. Cali bration Syste in Require in ents. Reliability Program Requirements for Weapon Systems Development, General Specification for. Igniter, Rocket Motor, MARK 264 MOD 1. Procedures and Requirements for Preparation and Soldering of Electrical Connect ions. Squib, Eelectric
9、, Dual Bridgewire, MARK 18 MOD O. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-OD-30393 STANDARDS FEDERAL FED-STD-H28 FED-STD-102 F ED-STD- 5 9 5 MILITARY MI JA-STD-12 9 MIL-STD-130 MI,-STD-143 MIL-STD-16 7-1 MIL-STD-3 3 1 MIL-STD-45 3 MIL-STD-4
10、54 NIIL-STD-7 8 5 Screw-Thread Standards for Federal Services. Preservation, Packaging, and Packing Levels. Federal Standard Colors. Marking for Shipment and Storage. Identification Marking of U.S. Military Property. Standards and Specifications, Order of Precedence for the Selection of. Mechanical
11、Vibrations of Shipboard Equipment (Type I-Envir onm en tal and Type II-Internally Excited). Fuze and Fuze Components, Environ- mental and Performance Tests for, Inspec tion, Radiographic. Standard General Requirements for Electronic Equipmen t. Reliability Program for Systems and Equipment Developme
12、nt and Production. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-III IL-D-8 2 U 8 7(0S) DRA WINGS Naval Air Systems Command . (Code Ident 30003) DL 1568376 DL 3300561 ,. DL 642AS6053 Environmental Tesi M ethods. Dissimilar Metals. Environments, Wor
13、king, Minim um Standards for. .- Asse in bly , Igni t er. Rocket Motor, Arming-Firiiig Device, MARK 298 MOD O. Assembly, Solenoid. (Copies of specifications, standards, drawings, and publications required by coiitractors in connection with specific procurement furictions should be obtained frotn .th
14、e procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following document forms 8 part of this speci- fication to the extent specified herein. Unless otherwise indicated, the issue in effect ondate of invitation for bids or request for proposal shall apply. CODE
15、 OF FEDERAL REGULATIONS 49 CFR 171-178 Transportation, (Application for copies should be addressed to the Superintendent of Docu- ments, Government Printing Office, Washington, D.C. 20402.) 3. REQUIKEMENTS 3.1 Item definition. The A-F device remotely arins and initiates a rocket motor, and consists
16、of a housing assembly and an igniter assembly, defined as f oll0 ws: .- 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-82687 33 7777706 O362603
17、 T W . MIL-D-8 268 7( OS) 3.2.1.1.1 Mechanical seal. When the A-F device is intentionally modified and fired in the safe condition, the A-F device housing assembly shall not exhibit a leak rate greater than 1 x standard atmospheric cubic centimeters per second (std aIm crn 3/s). 3.2.1.1.2 Electrical
18、. While in the safe condition, the fire and return lines to each squib bridgewire shall be shorted together, which will eliminate spurious electrical signals from initiating the squib. While in the safe condition, the monitor circuit shall present a continuous electrical path. 3.2.1.2 Armed conditio
19、n (see 6.4.2). Arming shall be initiated by the arm coininand which shall energize the solenoid. The solenoid shall then rotate the mechanical barrier so the barrier pins are aligned with the holes in the mechanical barrier. 3.2.1.2.1 Mechanical, armed condition. The A-F device shall arm within . 10
20、0 milliseconds (ins) maximum from the arm command, and shall be considered armed whenever the initiator assernbly is capable of translating past the rotor portion of the mechanical barrier. Upon removal of the arm command, the A-F device shall return to the safe condition. 3.2.1.2.2 Electrical, arme
21、d condition. The rotary motion of the solenoid shall simultaneously operate the switch. The switch shall complete the firing circuit to the squib after, or at the same lime as, the A-F device arms mechanically. 3.2.1.3 Firing, The A-F device shall have a separate firing circuit that is isolated from
22、 the missile system ground. The electrical circuit shall be capable of supplying 5 amperes (A) minimum to each of the squib bridgewires. 3.2.1.3.1 Squib. Upon squib initiation in the armed condition, the initiator assernbly shall translate forward and open the poppet valve, allowing the squib output
23、 gases to reach the igniter booster charge. 3.2.1.3.2 Igniter booster. The squib shall initiate the igniter booster pyrotechnic material which shall produce a pressure of 500 pounds per square inch (lb/in2 ) minimum when fired into a fixture that simulates the igniter tube. 3.2.1.3.3 Igniter grain.
24、The igniter booster charge shall initiate the igniter grain. The output of the A-F device shall produce an output equivalent to the MARK 264 MOD 1 Igniter when fired into the test fixture specified in WS-3853A. 3.2.1.4 Life expectancy. The A-F device shall be designed to have a life expectancy of 5
25、years minimum. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-82687(OS) . - 3.2.1.5 Radiographic. The A-F device shall show no evidence of cracks, voids or fissures, and shall meet the workmanship requirements specified herein. 3.2.2 Physica
26、l characteristics. The design concept of the A-F device is shown on Drawing 3300561. 3.2.2.1 Dimensions and weight. The dimensions and weight of the A-F device shall be as follows: (a) Length: 13 inches maximum. (b) Diameter: 4,385 incnes maximum ai. motor closure. (c) Weight: To be determined (TLID
27、). 3.2.2.2 Mechanical. The mechanical design shall be as follows. 3.2.2.2.1 Initiator assembly. The initiator assembly shall include a free volune so that squib pressure is limited to a safe value in the event of firing in the safe condition. The initiator assembly shall be secured to maintain the p
28、roper angular relationship between the rotating arid nonrotating components of the mechanical barrier. The initiator assembly shall be secured to prevciit axial translation before squib firing. 3,2.2.2.2 Mechanical barrier. The mechanical barrier shall withstand a squib generated pressure of 10,000
29、lb/in2 when the A-F device is intentionally mod- ified and fired in the safe condition. The resulting deformations shall not allow the initiator assembly to move Inore than 0.050 inch. The rotor portion of the mechanical barrier shall be keyed and secured io the solenoid assembly to ensure proper al
30、ignment. 3.2.2.2.3 Solenoid assembly. The solenoid assembly (DL 642886053 shall meet the following requirements: (a) Rotation: 45 k3 degrees at applied voltage. (b) Net torque; 1.0 ounce-inch (oz-in) ininirnum at minimum applied voltage. (c) Return-spring torque: 1.5 oz-in miniinum. 3.2.2.2.4 Housin
31、g asseinbly. The housing asse:nbly shall withstand, without perinanent deformation, an internal pressure of 10,000 lb/in2 resulting from squib initiation, The housing assembly shall maintain structural integrity throughout the flight of the missile. The housirig assembly and the igniter tube shall n
32、ot touch the motor grain or inhibitor coating. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _. :MIL-D-82887(OS) I A be in accordance with Drawing SK 3300570 containing the solenoid assembly, switch, and mechanical barrier, shall be pro- tected
33、by environmental seals with a leak rate which shall not exceed 1 x std atm cm3/s. I the pyrotechnic components specified on DL 1568376. I and circuitry. The design shall not require any wire connections to be made after the A-F device is installed in the rocket motor, and shall provide electro- magn
34、etic shielding, as specified in 3.3.2. 3.2.2.3.2 Electrical interface characteristics. The A-F device electrical (1) 28.0 k2.5 ohms. (2) Solenoid case insulation resistance: 100 megohms (Mohms) mini- I mum at 500 volts direct current (Vdc). (3) Input voltage: 26 f4 Vdc. (4) Minimum resultant current
35、 handling capability: 1.2 A continuous, (5) Back-to-back zener diode for inductive kick suppression. I (1) Resistance: 0.65 k0.20 ohm. I I (2) Input voltage: 26 f4 Vdc. (3) Current handling capability: 10 A minimum. I (1) Resistance: 0.5 ohm maximum, (2) Current handling capability: 0.5 A continuous
36、. / I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-82687 13 777790b 03bZb05 7 . ;YlIL-D-82687(OS) 3.3.1 Materials, processes, and parts, 3.3.1.
37、1 Moisture and fungus resistance. Materials shall be resistant to the corrosive ction of salt air and damage from moistiire and fungus in accordance with MIL-E-8.189. Protective coatings shall be acceptable as inoisture, fungus, arid corrosion preventatives on parts which will not lose a coating dur
38、ing the normal course of examination, operation, and periodic test. 3.3.1.2 Materials. Materials shall be in accordance with existing Government specifications wherever possible. For materials not covered by Government specifications, the requirements shall be as detailed on the applicable drawings.
39、 3.3.1.3 Dissiriiilar metals. The A-F device shall be designed for rnaxiinum corrosion resistance between dissimilar metals in accordance with NIIL-STD- 889, and shall be insulated in accordance with MII,-F-7179 wherever contact is unavoidable. 3.3.1.4 Castings. Castings shall not be used for parts
40、which are stressed more than 50 percent of the material yield strength. The applicable drawings specify where castings shall be irsed. 3.3.1.5 Plastics. The use of plastics within the A-F device shall be limited to those rnatsi*iala which will not outgas corrosively, creep under the applied load, no
41、r crack due to aging. 3.3.1.6 Threads. Threads and the go/no-go gaging practice shall be in accord- ance with FED-STD-H28. Ttie class or fit for threads shall be as specified on the drawings. 3.3.1.7 Soldering. Soldering of all electrical connections shall be in accord- ance with WS-6536. All mechan
42、ical soldering shall be in accordance with MIL- S-6872. 3.3.1.8 Wiring. Wiring aiid terininal design s!iall include protection against environmental and mechanical hazards to prevent corrosion or shorting of cir- cuits. Electrical connec tors shall be capable of being connected and disconnected arid
43、 the cables flexed without darnage within the storage temperature range from -80 to +167 degrees Fahrenheit (OF). 3.3.2 Electromagnetic radiation. Using OD-30393 as a guide, accepted design practices shall be followed when designing the A-F device to reduce susceptibility to electromagnetic radiatio
44、n. 3.3.3 Nameplates and product marking. Nameplates and product marking shall be in accordance with MIL-STD-130. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-82687 13 m 9799906 0362606 9 m 3.3.4 Workmanship. The A-F device shall be constr
45、ucted and finished in a thoroughly workmanlike manner. Particular attention shall be given to neat- ness and thoroughness of soldering, marking of parts, wiring, welding -and- brazing, plating, riveting, finishes, machine-screw assemblage, freedom from brrs, sharp edges, dirt, chips, or other foreig
46、r. matter and visible defects which are likely to affect or render the A-F device unsatisfactory and nonserviceable over the useful life for the operation or function intended. Workmanship.for electronic equipment shall be in accordance with MIL-STD-454, Requirement 9. 3.3.4.1 Screws, Screws shall b
47、e the self-locking type, wherever possible. 3.3.4.2 Welds, Welds shall be in accordance with MIL-W-8611. 3.3.4.3 Brazing. Brazing shall be in accordance with MIL-B-7883. 3.3.4.4 Cleanup. Prior to and after final assembly, all subassembly parts and the assembled A-F device shall be thoroughly cleaned
48、 of any foreign matter. 3.3.4.5 Facilities and working environment. The contractor.shal1 provide adequate f acilities for the fabrication, assembly, testing and examination of the A-F device. Unless otherwise specified in the contract or purchase order, as a minimum, the working environinent shall m
49、eet the levels and requirements specified in MIL-STD-1695 (see 6.2.1). 3.3.5 Interchangeability. Mechanical and electrical interchangeability shall exist between sirnilar assemblies or subassemblies of the A-F device, Interchange- ability requires the substitution of sirnilar parts without physical modification . . to any part of the component, including cabling, wiring,
