1、MIL-I-103 13 U 9999906 0359771 b U - - _- , I -. -. c t -b MIL-141803 (AS) .4 December 1970 Superseding AS-i075 20 September i968 ; .(- MIUTARY SPECIFICATION IGNITION ELEMENT, ELECTRICAL, MARK i4 MOD O This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1.
2、SCOPE 1.1 This document governs the manufacture, assembly and preparation for delivery of the Ignition Element, Electrical, MARK lk MOD O, and the methods of inspection and tests upon which product acceptance will be based. . 2. APPLICABLE DOCXJMEXPS 2.1 The following specifications, standards, draw
3、ings, and publications, of the issue in effect on date of invitation for bids, form a part of this document to the extent specified herein. SPECIFICATIONS Military MIL-P-U Preservation, Methods of MIL1 -2 36 59 STAMIARDS Initiators, Electric, Design and Evaluation of Military MILSTD-O MIL-STD-I2g Sa
4、mpling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Licensed by Information Handling ServicesMIL181803 (AS) MIL-STD-414 Sampling Procedures and Tables for Inspection by Variables for Percent Defective DRAWINGS Kaval Air Systems Command (Code Ident 30003) Igniti
5、on Element, Electrical, EIAIIK i4 MOD. O Composition, Primer 878 (Formerly Code Ident lml) ignition Element, Electrical, MARK i4 MOD O, Assembly Electrode Assembly 2520058 Ignition Composition PUBJJCATIONS Bureau of Naval Weapons (Code Ident 1OOO1) WR- 43 Ammunition Ashore (This publication is not f
6、urnished to bidders and contractors by the procuring activity. Contractors should contact the Government Inspector for use of the publication.) Preparation of Quality Assurance Provisions ( Copies of specifications, standards, drawings, and publications required by contractors in connection with spe
7、cific procurement functions should be obtained fmm the procuring activity or as directed by the Contracting Officer. ) 2.2 Other publications. The following document forms a part of this specification. Unless otherwise indicated, the issue in effect on date of invitation for bids shall apply. 2 Lice
8、nsed by Information Handling ServicesMILI- 81803(AS ) . CODE OF FEDERAL REGUIATIONS . 4 CFR 171-178 Transportation, Explosives and Other Dangerous Articles of Documents, Government Printing Office, Washington, D. C. Orders for the above publication should request the latest edition and supplements t
9、hereto ) (Application for copies should be addressed to the Superintendent 20402. 3. RE however, one primary component production lot may be used in more than one ignition element production lot. 4.4 - Gages, The contractor shall provide gages as necessary to insure that the material to which this s
10、pecification applies will meet the dimensional requirements shown on the applicable drawings. 4.5 Classification of characteristics. The characteristics .verified bv the tests and examinations herein are classified as Critical, Major o; Minor in accordance with WR-43. critical characteristics are id
11、entified by the symbol (C) and major cheracteristics by the symbol (M). cation symbol indicates the serial number of test or examination. and examinations which are not annotated with a classification code are classified minor. Tests and examinations that verify The number following the classifi- Te
12、sts 4.6 Quality conformance inspection. Quality conformance inspection shall consist of verification of the characteristics classified on the drawings of DL 2520046 and verification of the following requirements and tests : 7 Licensed by Information Handling ServicesNature of Clac si fi - Requiremen
13、t Applicable cation Item Verification Paragraphs (XR-43) - Priouory Component Ignition and Primer Coapositions Elect rode As s embl y Electmde Assembly Ignition and Primer Booster and Smokeless Powder Ignition Eement Ignition Element Compositions Ignition Charges Ignition Element Ignition Element Ig
14、nition Element Ignition Element Ignition Element Ignition Element Single lot or batch Moisture content Insulation resistance Bridgewire welding Compounding and Type and weight loading Condi tion Visual inspection Bridge circuit res is tance Leakage x-ray Electric sensitivity Ballistic requirements a
15、.istics (change in propellant lot ) Packaging, packing and container markings . 3.3, 3.5, 3 06, 3 -7 3 *e 3.9 -1 3.9.2.1, 3-10.1, 3 e10 *2, 4.3.3 4.7.1 4.7.3 4.7.2 4.7.6 4.7*5 4.7.7 4.7.4 4.7.8 c.7.9 4-10 4.15.1 4.6.1 Packing, packaging and marking. Quality conformance inspection shall be conducted
16、to verify that the packaging, packing and the container mrkings are in accordance with Section 5. 4.7 Tests. 4.7.1 Deteming moisture content. Transfer approximately two grams of the ignition composition to be used in loading to a tared weighing; dish, - - weigh to the nearest 0.1 milligram, calculat
17、e the weight of the sample, transfer weighing dish and sample to a vacuum 6rying oven, dry at +160 f 5OF and 28 k 2 inches of mercury vacuum until constant weight is obtained. loss of weight represents the percentage of moisture in the original sample. Use the same procedure for the primer compositi
18、on. The 4.7*2 Smokeless powder, condition. Smokeless powder shall be inspected in accordance with the applicable paragraphs of OP 5. decomposition shall be cause for rejection, Evidence of 8 Licensed by Information Handling Services- - MIL-I-L03 23 797970b 0357977 O = MIL-I -81803 (AS ) 4.7.3 InsuLa
19、tion resistance. Prior to assembly of the bridgewire in the Electrode Assembly, Drawing 25200j3, the insulation resistance between the netal parts of the assembly shall be checked with an applied voitage of 500 k 25 volts DC. Units which fail to meet the requirements of 3.6 shall be rejected. 4.7.1;
20、 x-ray of ignition element. fiamine ail ignition elements by X-ray and reject those having any of the defects of 3.10.4. Ignition elements shall be mounted in suitable racks or-frames and laid on their side so that the most revealing exposure can be obtained. Pressure-sensitive tape may be used as a
21、n aid in positioning the ignition elements. 4.7.5 Bridge circuit resistance. Confomnce with the bridge circuit resistance cf 3.10.2 shall be ascertained by means of a test circuit which limits the bridge current to 25 milliamperes, maximum. shall be connected to the ignition element through suitable
22、 test leads. A safety chamber with an interlock switch shall be used to protect the operator during the application of current. A suitable bridge which is known to be accurate within one percent in the range of resistance specified shall be used to determine whether or not the requirement is bein6 m
23、et. Units which fail to meet the requirements of 3.10.2 shall be rejected. The results of bridge circuit resistance measurements shall not be affected by resistance of the test circuit and leads. The test circuit 4.7.6 visuai inspection. Examine all ignition elements visuay k.7.7 kakage. Ehch igniti
24、on eleaent in the preproduction sample and reject those having any of the defects of 3.10.1. or production sample shall be leak tested in a dry gas or dry air lea tester. Ignition elements which exhibit a leak rate in excess of laF cc/sec gas or air at a pressure differential of 1.0 4 0.1 atmosphere
25、 shall be considered defective. which exhibit a leakage defect shall be rejected. If one or more ignition elements of the production sample exhibit a leakage defect, then a 100 percent leak test of the lot being tested shall be required at no additional expense to the govehent. a leak rate in excess
26、 of that specified above shall be rejected. Ignition elements of the preproduction sample Ignition elements which exhibit 4.7 .$ Rectric sensitivity tests. . 4.7.8.1 No-fire test. Each ignition element of the preproduction sample and the production lot sample shall be conditioned at i70 4 ?OF for a
27、minimum of six hours and then tested. the ignition element is sufficiently shielded to prevent personnel injury or material damage in the event an ignition element fires. During the test insure that The firing 9 Licensed by Information Handling Servicescircuit shall contain a suitable resistor in se
28、ries to regulate the current to 1.0 +Oe10 amperes measured to an accuracy of one percent. This current shall be applied to the ignition element for a period of not less than 5 ninutes nor more than 5i minutes. An ignition element which fires shall be considered defective and shall cause rejection of
29、 the lot represented. -0 .o0 4.7.9 !alistic tests. 4.7.9.1 The number of ignition elements selected from each production lot for the ballistic tests shall be in accordance with the requirements of Tables A-2 and B-1 of MIL-STD-414, Inspection Level IV and an AQ,L of 0.10. After all ignition elements
30、 of the sample under test have met the no-fire requirements of 4.7.8, the elements shall be conditioned for a minimum of six hours at +TO k 5OF and fired in a closed chamber having an internal volume, exclusive of ignition element volume, of ten cubic centimeters and adapted for measurement of time
31、from application of current to start of pressure rise and maximum pressure. diameter of the closed chamber shall be approximately 1:l. The firing current shall be 4.0 -co-lo amperes. elements for the above test, ten additional ignition elements shall be furnished from the production lot for investig
32、ative purposes. The ratio of length to In addition to the sample of ignition -0.00 4.7.9 2 Criteria of acceptabilitx. 4.7.9.2.1 Chamber pressure. The lower limit of maximum pressure shall be as specified in 3.ll.2,l. (x-L)/S is equal to or greater than the appropriate value of K, at an AQL of 0.10,
33、when computed in accordance with Section B, Part I of The lot shall be acceptable if the quantity MIL-STD-414. 4.7.9.2.2 Response time. The failure of any ignition element to meet the response time requirement of 3.11.2.2 shall cause rejection of the lot represented. 4.7.9.2.3 Misfire. The failure o
34、f any ignition element to fire shall result in rejection of the lot represented, unless such failure is plainly attributable to faulty test equipment or procedure. 4.8 Retest. There shall be no retests. 4.9 Test failure. If test failure is attributable to an assignable cause, excluding the test igni
35、tion element, original test results should be discarded and that part of the test reconducted. 10 Licensed by Information Handling ServicesMIL-1-81803 13 W 33337Ob 035771 7 W - MIL-1-81803 (AS ) 4.10 Change in propellant lot. Whenever a change in propellant lot occurs, the charge shall be verified b
36、y firing 36 ignition elements which have been tenperature conditioned for a minimum of six hours (12 at -80 f 5OF, 12 at 170 f 5OF and 12 at 4-225 P 5F). Results of these firings shall meet the requirements of 3.11.3. 5. PREPARATION FOR DEXJVERY 5.1 Preservation and packaging. 5 .L.1 Level A. Not ap
37、plicable. 5.1.2 Level B. Not applicable. 5.1.3 Level C. When directed by the procuring activity, elements intended for expenditure in preproduction sample testing and for pro- duction lot acceptance tests or shipment to point of assembly into cartridges, shall be packaged in accordance trith Method
38、III of m-p-116 and with the Code of Federal Regulations 49 CFR 171-178. For definition of Level C packaging, see 6.4. 5.2 Packing. 5.2.1 Level A. Not applicable. 5.2.2 Level B. Not applicable. 5.2.3 Level C. When directed by the procuring acitivity, elements intended for-expenditure in preproduction
39、 sample testing and for pro- duction lot acceptance tests or shipment to point of assembly into cartridges, and are packaged in accordance with 5.1.3, shall be packed to afford protection against damage during direct shipment from the supply source to the first receiving activity for immediate use.
40、Shipping container shall be in accordance with the Code of Federal Regulations 49 CFR 171-178. For definition of Level C packing, see 6.4. 5.3 Markings. 5.3.1 Special markings. Marking of exterior containers shall be in accordance with the Code of Federal Regulations 49 CFR 171-178. 5.3.2 Normal mar
41、kings. Unit packages and shipping containers shall be marked in accordance with the requirements of MIL-STD-1s. 11 Licensed by Information Handling ServicesMI L-I - 81805 AS ) 6 .l Intended use. This ignition element was originally designed 6.2 Ordering information. Procurement documents should spec
42、ify to be used in MARK 124 and MARK 125 impulse cartridges. the follcwing: a. title, number and date of this specification; b. whether preproduction inspection is required, and if so, specify the test activity; production lot size and test activity (see 4.3.3); items of data required for each prepro
43、duction and production lot (see 6.3). c . d. offi (b). 6.3 Data. For the information of contractors and contracti% .cers, any of the data specified in (a) subparagraphs below, applicable documents listed in Section 2 of this specification or (c) referenced lower-tier documents need not be prepared f
44、or the Government and shall not be furnished to the Government unless specified in the contract or order. - 6.3.1 Test report. Results of ballistic tests shall be forwarded to the Naval Air Systems Comnd (AIR-53222) and the procuring activity. 6.3.2 Data cards. The contract or order choul state the
45、format, quantity and destination of data cards, 6.4 Definitions. For the purposes of this specification, the 6.4.1 Level C packaging;. The degree of preservation and packaging which will afford adequate protection a nst corrosion, deterioration and physical damage during shipment from supply source
46、to the first receiving activity for immediate use. This level r,ey cnform to suppliers comercial practice when such mzetc the require- ments of this level. following definitions apply. 6 .).i .2 Level C packing. The degree of packing which will afford pmtection against damage during direct domestic
47、shipment from the supply source to the first receiving activity for immediate use. This level in general will conform to applicable carrier niles and regulations and may be the suppliers commercial practice when such meets the requirements of this level. 12 *. _. I . . - , _ . - .- . Licensed by Inf
48、ormation Handling Services_ MIL-I-8LO3 L3 999790b 0359983 2 EEL-161803 (AS) 6.5 Explosives safeky precautions. Safety precautions for explosive-loaded items are contained in MCL-SW-l3l4. 6.5 .I Applicability. The loading, assembly and handling of tine explosives, explosive-loaded subassemblies and t
49、he finished items covered by this specification involve hazardous operations and there- fore require suitable explosives safety precautions. the Naval Air Systems Command, Department of the Navy, and other Governent plants where the Government is responsible for safety, the precautions listed in MIL-STD-1314 are mandatory. These same minimum provisions are recommended for observance by a contractor or manufacturer that explosively loads or assembles the item covered in this specification in order to fulfill his om? safety responsibility. At plants of
