1、MIL-S-48405 15 October 1973 MILITARY SPECIFICATION SHIELDED AND CONFINED MILD DETONATING CORD ASSEMBLIES This specificaton is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 General. This specification covers the general requirements for the design, develo
2、pment and preproduction testing of Shielded and Confined Mild Detonating Cord Assemblies to be utilized for aircrew escape systems. Shielded Mld Detonating Cord and Flexible Confined Detonating Cord here- after referred to SMDC and FCDC respectively. 2. APPLICABLE DOCUMENTS 2.1 The following or.requ
3、est for proposal, f ied herein SPECIFICATIONS Federal QQ-A-200 QQ-A-2 2 5 FED-STD-595 Military MIL-D-1000 MIL-C-5541 MIL- 1-6 866 MIL-1-6868 MIL-H-687 5 MIL-F-7179 MIL-S-7742 MIL- 1-85 O O MIL-A-8625 MIL-T-18303 documents of the issue in effect on the date for bids form a part of this specification
4、to the extent: speci- Aluminum Alloy, Bar, Rod, Shapes, Tube and Wire, Extruded and Structural Shapes, General Specification for Wire or Special Shapes; Rolled Drawn or Cold Finished, General Specification for Aluminum and Aluminum Alloy Bar, Rod, Colors Drawings, Engineering and Associated Lists Ch
5、emical Film and Chemical Film Material Inspection, Penetrant, Method of Inspection Process, Magnetic Particle Heat Treatment of Steels (Aircraft Prac- tice Process for) Finishes and Coatings: General Speci- fication for Protection of Aerospace Weapons Systems, Structrues and Parts Screw Threads, Sta
6、ndard Optimum Selected Series, General Specification for Interchangeab il it y and Replaceab il it y of Component Parts for Aircraft and Missiles for Aluminum and Aluminum Alloys Anodic Coatings, for Aluminum and Aluminum Test Procedures; Preproduction Acceptance and Life for Aircraft Electronic Equ
7、ip- ment, Format for Alloys A Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-4 8405 MIL-P-22808 MIL-P-23377 MIL-A-2 5 165 MIL-U-81055 MIL-L-81352 STANDARDS Military MIL-STD-143 MIL-STD-331 MIL-STD-453 MIL-STD-794 MIL-STD-810 MIL-STD-831 MIL-ST
8、D-882 MIL-STD-889 MIL- STD-1166 MIL-STD-1316 17983 MS20995 MS21919 MS33540 HANDBOOKS Military MIL-HDBK-5 ANA-438 Navy WR-62 WS 4660 WS-5003 . Paint, Epoxy, Hydraulic Fluid Resistant Primer Coating, Epoxy Polyamide, Chemical Aircraft Emergency Escape System Identi- Ultrasonic Inspection Lacquer: Acry
9、lic (for Navai Weapons) and Solvent Resistant fication of Specifications and Standards, Order of Fuze and Fuze Components, .Environmental In spec t ion, Radio graphic Parts and Equipment, Procedure for Packaging and Packing of Environmental Test Methods Test Reports, Preparation of System Safety Pro
10、gram Dissimilar Metals Radiographic Testing Requirements for Solid Propellant Fuses, Navy, Design Criteria for Compass, Magnetic, Pilots Standby Wire, Lock Clamp, Cushioned, Support, Loop-Type Air- craft ASG Safety Wiring, General Practices for Precedence for the Selection of and performance tests f
11、or Metallic Materials and Elements for Age Controls of Age Sensitive Elastomeric Aerospace Vehicle Structures Items Naval Weapons Requirements, Specifica- Dipam Fxplosive(U) Purchase Description HNS Explosive (U) Purchase Description tions and Standards: Use of 2 Provided by IHSNot for ResaleNo repr
12、oduction or networking permitted without license from IHS-,-,- MIL-S-q405 13 M 9799906 0319960 T MIL-S-4 8405 3. REQUIREMENTS 3.1 Preproduction.- This specification makes provision for prepro- duct ion testing , 3.2 Selection of Specification and Standards,- Specifications and Standards for necessar
13、y commodities and services not specified herein shall be selected in accordance with MIL-STD-143. 3.3 Materials.- Ail materials used in propellant formulation, hardware components, adhesives etc., should be in accordance with existing government specifications, tions shall require prior approval by
14、the cognizant design agency. Use of materials not covered by existing Government specifica- 3.3-1 Metals,- Metals shall be of the corrosion resisting type or shall be suitably protected to resist corrosion in all the environments required by this specification, when in storage or during normal servi
15、ce life. otherwise specified herein, physical properties of all metals shall meet the minimum requirements specified in MIL-HDBK-5 . Unless 3.3.1.1 Dissimilar Metals.- Dissimilar metals, as defined in MIL-STD- 889, shall not be used in contact with each other. Where such contact is una- voidable, th
16、e parts shall be protected in accordance with MIL-F-7179. 3.3.1.2 Heat treatment.- Heat treatment of steel parts shall be in accordance with Specification MIL-H-6875. 3.3.1,3 Aluminum.- Where a high strength aluminum alloy is required, 7075-T73 2024T3 or 6061T6 in accordance with Specification QQ-A-
17、225 (wrought) and QQ-A-200 (extruded) shall be used. 3.3.1.4 Magnesium and Magnesium Alloys,- Magnesium and magnesium alloys shall not be used. 3.3.1.5 Castings.- When used, castings for structural applications re- quire procuring activity approval prior to use. 3,3.2 Limited life items.- The use of
18、 materials and elements whose life is anticipated to be less than the required life of the assemblies shall not be used. 3.3.3 Reaction of materials.- Materials shall not be used which may pro- duce and emit toxic, nauseating, or corrosive products under the environmental conditions specified herein
19、. In addition, materials shall be capable of func- tioning in the fluids, vapors or gases specified herein, before, during and after exposure to all the environmental Conditions specified herein. 3.3.4 Non-metals.- When plastics, elastomeric and nonmetallic materials other than military approved art
20、icles are used, adequate proof of their suita- 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-484 5 biiity shall be submitted along with test articles submitted for evaluation testing. their resistance to air and hydraulic fluid (where appli
21、cable) including the special problems of dimensional stability, aging characteristics, moisture absorption, and thermal embrittlement. The use of these articles shall be with proper consideration of Liquids shall not be used in final assembly unless approved by the pro- Age controls for elastomers s
22、hall be in accordance with ANA curing activity. Bulletin No. 438. 3. , 3.3.5 Fungus-proof materials.- Materials which are not nutrients for fungi shall be used to the greatest extent practicable. that are nutrients for fungi must be used, such materials shall be treated with a fungicidal agent. Wher
23、e materials 3.3.6 Parts. 3.3.6.1 - Inspection of metal parts.- All highly stressed steel parts shall be subjected to magnetic particle inspection in accordance with Specification MIL-I-6868 or a similar method. Titanium, aluminum or nonmagnetic steel high stress parts shall be inspected in accordanc
24、e with Specification MIL-1-6866 penetrant inspection. 3.3.7 Protective treatment.- All materials used which are not inherently corrosive resistant, shall be treated in accordance with Specification MIL-F- 7179 to resist any corrosive effects resulting from the environmental conditions specified here
25、in. Any protective coatings used shall not crack, chip, erode, scale with age or degrade the structural integrity of the materials used in construction of the assemblies when exposed to conditions specified herein. 3.3.7.1 Aluminum.- All aluminum and aluminum alloys shall be anodized in accordance w
26、ith Specification MIL-A-8625 Type II coatings except that in the absence of-abrasive conditions, the anodize may be Type I coating where applicable, except for MDC sheath. of chemical film in accordance with Specification MIL-(2-5541, Grade B. Repair or touch up shall be by application 3,3.7.2 Primi
27、ng and painting.- In addition to the surface treatments herein, all external surfaces of the assemblies shall be primed and painted as follows,.except where such finish would impair proper function. (a) or MIL-P-22308. One coat of epoxy primer conforming to Specification MIL-P-23377 (b) One acrylic
28、or epoxy topcoat conforming to Specification MIL-L-81352. (c) Color in accordance with Specification FED-STD-595 and subject to procuring activity approval. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-48405 13 = 7777906 0337762 3 M MIL-S-
29、4 8405 3.4 Design and construction.- inert connectors shall be as shown in Figure 3. The configuration of the SMDC and the 3.4.1 Weight (Guaranteed).- The guaranteed weight of the assemblies and the inert connectors shall be kept to a minimum consistent with the re- quirements of this specification.
30、 3.4.2 Interchangeability.- All parts having the same manufacturers The drawing number requirements of MIL- part number shall be functionally and dimensionally interchangeable as de- fined in Specification MIL-1-8500, D-1000 shall govern the changes in manufacturers part numbers. 3.4.3 Workmanship.-
31、 Workmanship shall be in accordance with high grade aircraft practice and of a quality to assure safety, proper operation, and service life. tractor quality control. Workmanship shall be inspected and certified by the con- 3.4.4 Radiographic Inspection. 3.4.4.1 X-Ray inspection.- The assemblies shal
32、l be X-Ray inspected along their straight length and ends only after forming, in accordance with Standard MIL-STD-453. X-Ray film shall be retained, The accept/reject criteria to be used in the evaluation of the X-rays shall be coordinated between the contractor and the procuring activity and shall
33、be approved prior to qualifica- t ion. 3.4.5 Residual magnetism.- All parts made of materials that are capable of retaining residual magnetism shall be demagnitized sufficiently to prevent component malfunction due to accumulation of magnetic contaminants. 3.4.6 Installation requirements.- The produ
34、ction assembly configura- tions shall correspond to the inert masters furnished by the procuring acti- vity. All SMDC assemblies shall meet the following requirements. 3.4.6.1 SMDC 6 FCDC end fittings.- The SMDC assemblies when installed in the ports shall be capable of withstanding A70-TO90 IN-LBS
35、torque values: 3/8 - 24 UNF - 3A THD, 1/2 - 20 UNF-3A THD 7/16 - 20 UNF - 3A THD, 5/8 - 18 UNF - 3A THD FCDC End Fittings.- tion as shown in Figures 1 and 1A shall be torqued as installed prior to firing. The fitting shall be capable of withstanding 90 inch-pounds of torque. FCDCs shall remain intac
36、t in port areas after firing. of the FCDC when mounted into fittings indicated in Figure 3 shall be capable of withstanding a tensile load of 350 pounds minimum applied at a rate of 8 + 2 pounds per second. The FCDC assemblies when installed in the port configura- All The end fitting joint 5 Provide
37、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-48405 13 777970b 03177b3 5 W MIL-S-48405 3.4.6.2 Stainless steel tube segments.- The stainless steel tube segments of the SMDC after assembly shall be capable of being formed to a 3/4 inch radius helix o
38、n the centerline of the assembly without rupturing the tubing or detri- mentally affecting the performance requirements specified herein. 3.4.6.3 Flexibility. 3.4.6.3.1 Final assemblies.- The final assemblies of the FCDC shall be capable of being formed around a 2.50 inch diameter mandril without ru
39、pturing the plastic covering or detrimentally affecting the performance requirements speci- f ied herein. 3.4.6.3.2 The final assembly FCDC.- Units shall be capable of 20,000 flexure cycles of 40“ in one plane, tion and held firmly at one end on a surface, flex the unit 20“ in one direction; back to
40、 vertical then 20 in the opposite direction and back to vertical for one (11 complete cycle, With the FCDC assembly in a vertical posi- . 3.4.7 Sealing requirements,- The assemblies shall be sealed to prevent , penetration by water, moisture, and dust with a maximum leakage rate of 1 x lom5 std cc/s
41、ec of e.g., oscillograph, oscilloscope, or magnetic tape, Transducers may be any state-of-the-art type; e,g, piezo-electric, strain gage, variable reluctance, capacitive, or potentiometer. However, accuracy 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
42、IHS-,-,-MIL-S-48405 13 W 3499706 03L44b4 b W MIL-S-48405 of all test apparatus shall conform to the requirements of MIL-STD-810. Do- cumented calibration records will be maintained and be available for inspec- tion by the cognizant design agency. 4.4 Test Methods. 4.4.1 Component inspection.- Each p
43、art of the assembly shall be i00 per- cent inspected for conformance in the applicable drawing. 4.4.2 Examination of product.- Examination of the assemblies shall be made to detect visible defects and to determine that the assemblies meet the finish, and marking requirements and that they conform to
44、 the applicable draw- ing. 4.4.3 Leak detection,- All assemblies shall pass a dry gas leak test. per second of air at Assemblies which exhibit a leak rate in excess of a pressure differential of 15 0.1 atmosphere shall be considered defective. 4.4.4 Demagnetization test.- The assembly shall be check
45、ed for residual magnetism in an area free of local magnetic effects by placing the device 6 inches from a pilots standby compass, type MS17983 or equivalent, in a north- sourh horizontal position with the compass placed in an east-west heading as shown in Figure 9. as the compass in a longitudinal d
46、irection along its entire length. cedure shall be repeated for every 90 degrees rotation of the device. assembly shall not deflect the compass more than three degrees. The device shall be placed at the same height from the floor This pro- The 4.4.5 X-Ray inspection,- The assemblies shall be X-ray in
47、spected along their straight length and ends only after forming, in accordance with Standard MIL-STD-453. The accept/reject criteria to be used in the evaluation of the X-ray shall be coordinated between the contractor and the procuring activity prior to commencement of production. 4.5 Preproduction
48、 tests.- Preproduction tests shall be made on equip- ments representative of the production equipments to be supplied under the contract. procedure of 4.7, Preproduction tests shall be accomplished under the approved test - NOTE: When preproduction tests are to be made on equipments manu- factured i
49、n the first production run, the equipments to be tested shall be selected by a representative of the procuring activity with the con- currence of the Government Inspector. 4.5.1 Scope of preproduction tests.- The specimen configuration shall be defined in detail spec. Preproduction tests shall include all tests speci- fied herein and shall be conducted in accordance with the requirements of this specification. Test values and parameters shall be as desi
