1、MIL-D-8 1980 (AS) 24. September 1974 MILITARY SPECIFICATION DESIGN AND EVALUATION OF SIGNAL TRANSMISSION SUBSYSTEMS: GENERAL SPECIFICATION FOR This specification has been approved by the Naval Air Systems Command, Department of the Navy. . 1. SCOPE- 1.1 This specification covers the general requirem
2、ents for design and establishes uniform methods for testing signal transmission subsystems. For purposes of this specification, a signal transmission subsystem (STS) includes the energy source(s) and output control function devices, and is composed of the following components : cartridges, electric
3、initiators, cartridge actuated devices (CADS), transmission lines, and other associated equipment (see 6.3.2). The transmission lines (hose/tubing, detonating cord, electrical, deflagrating cord, optical, etc,) provide the means for routing a signal(s) between STS components. STS examples and system
4、 applications are ejection seat/interseat sequencing subsystems, canopy removal subsystems, etc., for aircrew automated escape systems, guillotine severance subsystems for air-to-air refueling systems, sequencing subsystems for missile and target drone systems, etc. The purpose of the STS testing pr
5、ogram is to determine performance, safety, soundness of design, and resistance to environments encountered during service use. 2. APPLICABLE DOCUMENTS 2.1 The following-documents of the issues in effect on date of invitation for bids or request for proposals form a part of this specification to the
6、extent specified herein. SPECIFICATIONS Military MIL-P- 1 1 6 Preservation-Packaging, Methods of 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-1
7、780 13 m 777730b 0360286 7 m - MIL-D-8 1980 (AS) STANDARDS Military MIL-STD-129 MIL-STD-130 MIL-STD- 143 MIL-STD-794 MIL-STD-8 1 O MIL-STD-83 1 MIL-STD-87 5 MIL-STD-889 Navy Department wR-43 PUBLICATIONS Department of Defense DSM 4120.3-M National Bureau of Standards Handbook H-28 Code of Federal Re
8、gulations 49CFR 171-178 Marking for Shipment and Storage Identification Marking of U. S. Military Property Standards and Specifications, Order of Precedence for the Selection of Part and Equipment, Procedures for Packaging and Packing of Environmental Test Methods Test Reports, Preparation of Type D
9、esignation System for Aeronautical and Aeronautical Support Equipment Dissimilar Metals Preparation of Quality Assurance Provisions Standardization Policies, Procedures and Instructions Screw-Thread Standards for Federal Service Transportation (Copies of specifications, standards, and publications r
10、equired by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3. REQUIREMENTS 3.1 Selection of speci
11、fications and standards. Specifications and standards for necessary commodities and services not .specified herein shall be selected in accordance with MIL-STD- 1 43. t 3.2 Special requirements. Special requirements for specific applications shall take precedence over those listed herein, provided s
12、uch special requirements are more stringent. Other conflicting requirements are subject to the approval of the cognizant design agency for the specific application involved. 3.3 Materials. Materials for the individual STS components, shall be compatible with all other STS components/parts, i.e., exp
13、losive, propellant, delay composition, pyrotechnic, combustion products, buffering fluid (if used), etc.; and shall withstand environmental, functional, service, and storage conditions to which the STS will be exposed. Acceptance or approval of materials for design or use during the course of manufa
14、cture shall in no case be construed as a guarantee of acceptance of the finished item. Materials which are nutrients c for fungi shall not be used. 3.3.1 Metals. Exposed metals shall be of the corrosion-resisting type or suitably treated to resist the corrosive effects of fuels, salt spray, or atmos
15、pheric conditions to which the STS may be subjected in storage or normal service use. 3.3.1.1 Dissimilar metals. Dissimilar metals shall not be used in intimate contact with each other unless suitably protected against electrolytic corrosion. Dissimilar metals. are defined in MIL-STD-889. 3.3.2 Plas
16、tic parts. The use of plastic parts shall be subject to the approval of the cognizant design agency for the specific application involved. 3.4 Finishes. Protective coatings and finishes shall be used which will not crack, chip, or scale during normal service life or when subjected to environmental c
17、onditions specified herein. Surface treatments, coatings, and finishes shall conform to MIL-S-5002 except that aluminum and aluminum alloy parts shall be anodized in accordance with 3.4.1. 3.4.1 Anodizing. Aluminum and aluminum alloy parts subject to wear, abrasion, and erosion or exposed to corrosi
18、ve environmental elements shall be anodized in accordance with MIL-A-8625 , types II or III. Chemical conversion coatings conforming to MIL-C-5541 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-8 1980 (AS) may be used to repair mechanically
19、damaged areas from which the anodic coating has been removed, or to retain electrical conductive properties. 3.5 Color coding. Color coding of the STS transmission lines and associated equipment for identification purposes shall be subject to the approval of the cognizant design agency. 3.6 Design a
20、nd construction. The STS shall ensure reliable, repeatable transmission, without loss of subsystem/component integrity, and sufficient signal propagation from the energy source(s) to ensure reliable actuation of all STS components, as applicable. The design shall ensure minimum size and weight, resi
21、stance to deleterious environments, maintainability (see 3.6.9), and safety of operation. All STS components, Le., cartridges, electric initiators, CADs, transmission lines, and other associated equipment, submitted for or subjected to the requirements of 3.18 shall be of final design configuration,
22、 identical in design, manufactured by the same process, and shall be from the same lot. 3.6.1 Cartridges and cartridge actuated devices. Prior to commencing STS accepfance/inspection, environmental, and functional testing specified herein, cartridges and CADS shall have successfully met all the requ
23、irements and completed all tests required by MIL-D-21625 and MIL-D-23615, respectively, and shall be from an acceptable lot which has been tested in accordance with the applicable production acceptance specification. Unless otherwise Specified by the cognizant design agency, cartridges and CADs shal
24、l be government furnished equipment (GFE). 3.6.2 Electric initiators. Prior to commencing STS acceptance/inspection, environmental, and functional testing specified herein, electric initiators shall have successfully met all the requirements and completed all tests required by MIL-1-23659, and shall
25、 be from an acceptable lot which has been tested in accordance with the applicable production acceptance specification. Unless otherwise specified by the cognizant design agency, electric initiators shall be GFE. 3.6.3 Associated equipment. The contractor shall submit to the cognizant design agency,
26、 for approval, detailed specifications (see 3.9.3.4) for all other STS components (see 6.3.2) including follow-on production acceptance testing and nondestructive testing in accordance with MIL-1-6870. Prior to commencing STS acceptance/inspection, environmental, and functional testing specified her
27、ein, each component shall have successfully met all the requirements and completed all tests required by the approved detailed design specification and shall be from an acceptable lot which has been tested in accordance with the applicable production acceptance specification. Provided by IHSNot for
28、ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.6.8 Screw threads. Ali screw threads shall be specified in accordance with National Bureau of Standards Handbook H-28. 3.6.9
29、Disassembly and reassembly. Unless otherwise approved by the cognizant design agency, the STS shall be designed in such a manner that it can be disassembled for inspection or installation of cartridges, CADs, and associated equipment as applicable and reassembled. Disassembly and reassembly of the S
30、TS shall be accomplished by the use of standard tools. (See 3.6.1 1). 3.6.10 Installation. The STS components i.e. cartridges, CADs, transmission lines, and other associated equipment shall be selected, designed, routed, and mounted, as applicable, to withstand system operational loads, relative mot
31、ion between STS components, other subsystem(s) interfaces, etc., without degradation sufficient to cause loss of STS/component integrity during operation. Other considerations shall be ease of accessibility to maintenance personnel for periodic replacement of age limited components, resistance to de
32、leterious environments, and maintenance personnel safety during removal/installation operations. 3.6.10.1 Routing. The STS component location and routing and/or shielding shall be selected to provide maximum protection against (1) injuryldamage resulting in STS failure during operation and (2) damag
33、e encountered during service and/or maintenance operations. 3.6.10.2 Mounting connections. Installation provisions, e.g., mounting holes, flanges, and brackets, for STS components shall be so arranged that the possibility of incorrect installation or connection of fittings is minimized. Utilization
34、of female end fittings for transmission lines is preferred. Use of transmission line end fittings of different thread diameters is mandatory. End fittings, tightened to torques required by the system, shall withstand system operational loads and contain internal gas pressures produced by the STS. 3.
35、6.11 Locking of components/parts. All STS components/parts not required to have relative motion prior to or during STS initiation/operation shall be securely locked by a method that will not damage components or interfere with ease of assembly/disassembly. Safety wiring is the preferred method. (See
36、 3.6.9). 3.6.12 Service life. STS components excluding cartridges, CADs, and electric initiators when packaged in containers shall have a service life of not less than 5 years from the date of manufacture and shall be capable of being rendered serviceable after this period. Cartridge, CAD, and elect
37、ric initiator service life requirements are defined in MIL-D-21625, MIL-D-236 15, and MIL-1-23659 respectively. Service life assignments must be approved by the Naval Air Systems Command prior to application in service. Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
38、ense from IHS-,-,-MIL-D-1980 13 7979906 03b027L O MIL-D-8 1980 (AS) 3.6.13 Signal transmission subsystems for capsules and ejection seat types. A STS for escape and survival cockpit capsules or ejection seat types shall meet all additional requirements specified in MIL-A-23 121 or MIL-S-1847 1 , res
39、pectively, and all additional testing required by MIL-E-9426. 3.7 Nomenclature. The contractor shall follow the procedure outlined in MIL-N-18307 and MIL-STD-875 when submitting the DD Form 6 1 for nomenclature. The nomenclature requested by the contractor on DD Form 6 1 shall be concurred in by the
40、 Naval Air Systems Command prior to use. 3 -8 Marking. Identification marking foi each STS component excluding cartridges and CADS shall be clearly and permanently (nondefaceable through normal storage and service handling) marked in accordance with MIL-STD-130 with the STS component nomenclature (s
41、ee 3.7), manufacturer part number/serial number, contract number, lot number, manufacturers symbol or federal stock numberlfederal supply code number, and date of manufacture, as applicable. Name plates shall conform to MIL-P-5 14 requirements for composition A, Class 2 or composition C identificati
42、on plates, or MIL-P-19834. Cartridge and CAD marking requirements are defined in MIL-D-21625 and MIL-D-23615, respectively. No other markings shall be placed on the STS component except those required by 3.8.1. 3.8.1 Inlet/outlet ports. STS component ports shall be labeled “inlet” or “outlet”, as ap
43、plicable, and the direction of flow indicated with permanent red arrows. In addition, all STS ports/fitting ends shall be covered with suitable and effective shipping caps or plugs in accordance with MIL-C-5501, type and/or class as applicable, when the STS component is not installed. 3.9 Contractua
44、l documentation and data requirements. The cognizant government contracting agency when preparing a contract which includes STS development shall include, as a minimum, on the DD Form 1423 the following data requirements : 3.9.1 Comprehensive test plans outlining all proposed test procedures and sch
45、edules. The test plans shall include test objectives and descriptions of each planned test, equipment and facilities to be used, performance characteristics/accuracy of test instrumentation and recording devices to be used, and data to be recorded. 8 Provided by IHSNot for ResaleNo reproduction or n
46、etworking permitted without license from IHS-,-,-MIL-D-BLSBO 13 7997906 0360292 2 -_ MIL-D-8 1980 (AS) 3.9.2 Reports in accordance with MILSTD-831 of a tests performed by the prime or subcontractor during development (see 3.17) and service release of the STS. Copies of instrumentation and photograph
47、y records shall be submitted with the reports. Motion picture films shall be furnished on standard reels. 3.9.3 For transmission lines and associated equipment (see 6.3.2), requirements shall be as follows : 3.9.3.1 Drawings including special tooling required in accordance with MIL-D-1000 Category E
48、, Form 1. Also packaging and packing drawings to supplement 3.9.3.4.1 of this specification. 3.9.3.2 If full disclosure cannot be obtained for Category E, Form 1 drawings in accordance with MIL-D-1000 then a source control drawing, as defmed by MIL-D-1000 Category F, Form 3 shall be submitted. Also
49、the source control drawing shall include packaging and packing information in sufficient detail to meet the requirements of section 5 of this specification. If Category F, Form 3 drawings are submitted, complete drawings containing restrictive use notation shall be supplied to facilitate in-service support/malfunction investigation. 3.9.3.3 Detail and assembly drawings of test sets, including spec
