1、e MIL-G-857L9 13 777770b 0365799 b = f s-37-/9 MIL-G-85719(AS) 29- November 1985 MILITARY SPECIF ICATION GRAIN, IGNITER This specification is approved for use within the Naval Air System Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of De
2、fense. 6 a, 1. SCOPE P 1.1 Scope. This specification establishes the requirements for manufac- 12 ture and acceptance of the igniter grain critical item, herein referred to as “grain. “ 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications
3、 and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation.
4、 S P E C IF I CAT IONS FEDERAL FED-STD-102 Preservation, Packaging, and Packing Leve Is. Beneficial comments (recommendations, additions, deletions) and any per- tinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Engineering Center, Syste
5、ms Engineering and standardization Department (SESD), Code 93, Lakehurst, NJ 08733, by using the self-addressed Standardization Document Improvemnt Proposal (DD Form 1426) appearing at the end of this docu- ment, or by letter. i PSC 1337 - DISTRIBUTION STATEMENT A. Approved for public release; distr
6、ibution is unlimited. THIS DOCUMENT CONTAINS /y PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-85717 13 U 7779906 0365800 7 MILITARY MIL-M-382 MIL-1-85326 Magnesium Powder (For Use in Ammunition) . Igniter, Rocket Motor, MARK 297 MOD O.
7、STANDARDS MILITARY E MIL-STD- 10 5 Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-129 Marking for Shipment and Storage. MIL-STD-286 Propellants, Solid: Sampling, Examination and Testing. MIL- S TD- 8 3 1 Test Reports, Preparation of. 2.1.2 Other Government documents, drawings,
8、and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. wise specified, the issues shall be those in effect on the date of solici- tation. Unless other- OTHER GOVERNMENT DOCUMENTS Code of Federal Regulat
9、ions (CFR) 49 CFR 171-178 Tr ans port at i on. (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington D.C 20402.) DRAWINGS Naval Air Systems Command (Code Ident 30003) 1555641 1568376 1204AS201 Grain. Igniter, Rocket Motor MJC 264 MOD 1
10、 Assembly . Igniter, Rocket Motor, MARK 297 MOD O. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PUBLICATIONS Naval Sea Systems Command (Code Ident 53711) WS 3853 Igniter, Rocket Motor, MARK 264 MOD 1. WS 7682 Copolymer, Vinylidene Difluoride and
11、 Hexaf 11-10 ropropylene. (Copies of specifications, standards, handbooks, drawings, publications, and other Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.
12、2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, th
13、e issues of documents not listed in the DODISS shall be the issue of the nongovernment documents which is current on the date of the solicitation. American Society for Testing and Materials (ASTM)- MIL-G-85739 33 M 9777906 0365803 O m O I ASTM D 792 Specific Gravity and Density of Plastics by Displa
14、cement. ASTM D 1457 PTFE Molding and Extrusion Mat er ia1 s. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19013.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the re
15、ferences cited herein, the text of this speci- fication shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has heen obtained. 3. REQUIREMENTS 3.1 Item description. The grain is a pyrotechnic component composed ma
16、inly of magnesium and polytetrafluoroethylene (PTFE) extruded under pressure into a cruciform shape. The grain is used in rocket motor igniters. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2 Characte ris t ics . 3.2.1 Function. 3.2.1.1 MARK 2
17、64 igniter. The grains, when installed in the MARK 264 igniter, shall meet the performance requirements of WS-3853. 3.2.1.2 MARK 297 igniter. The grains, when installed in the MARK 297 igniter, shall meet the performance requirements of MIL-1-85326. 3.2.2 - Densa. cubic centime ter. The density of t
18、he grain shall be 1.86 k0.02 grams per 3.2.3 Composition. The grain shall be composed of the ingredients in the amounts as specified in Table I. TABLE I. Composition. -_I- Ingredient s Magnesium powder, Type III, granulation No. 16 Magnesium powder, Type III, granulation 325 Plastic molding material
19、 PTFE Plastic molding material PTFE Copolymer, vinylidene fluoride and hexaf luoropropylene - - - . - - - -_- Ap pl i cable do cume nt i/ MIL-M-382- ASTM D 1457 Type IV See Table II- 2/ WS 7682 - Parts by weight Minimum 52 14 14 15 - Maximum 56 16 16 17 !L/ The ratio of magnesium powder granulation
20、No. 16 to granulation No. 325 mesh may be varied from a nominal ratio of 50:50 by weight in order to control the burning rate characteristics of the propellant. The plastic molding material PTFE shall conform to all the requirements of ASTM D 1457 except as shown in Table II. 2/ 4 Provided by IHSNot
21、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-G-85727 23 W 7777706 03b5803 LI W MIL-G-85719(AS) TABLE II. Plastic molding material composition. Requr eme nt s Minimum For resin: Bulk density, g/liter Particle size, average diameter, micrometer Water content, p
22、ercent Melting peak temperature, OC Extrusion pressure For molded specimens: Thermal instability index Standard specific gravity Tensile strength, MPa Elongation, percent 575 475 - 317 NIA - 213 13.8 140 Maximum 675 625 0.03 337 N/A 50 218 - 3.2.4 Heat of explosion. The heat of explosion shall be 1,
23、450 +lo0 calories per gram. 3.2.5 Burning rate. The grain burning rate shall be as specified on Figure 1. The burning rate curve, as determined by the method of least squares, shall fall within the acceptable range as specified on Figure 1. All burning rate data shall be used in determining the burn
24、ing rate curve. 3.3 Design and construction. 3.3.1 Production drawings. The grain shall be manufactured in accord- ance with Drawing 1555641 and as specified herein. 3.4 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.2
25、and 6.2.3). 3.5 Workmanship. The grain shall be manufactured in a manner to assure conformance with all the requirements of this specification and shall be uniform and free from all foreign materials or contaminants. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
26、nse from IHS-,-,-4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order (see 6.2.11, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the con
27、tract OK purchase order (see 6.2.11, the contractor may use his own or any other facilities suitable for the perform- ance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the speci
28、fication where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. - All items shall meet all require- ments of Sections 3 and 5. The inspection set forth in this specification shall become a part of the contr
29、actors overall inspection system of quality program. The absence of any inspection requirements in the speci- fication shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contr
30、act. mance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. Sampling in quality confor- 4.1.2 Classification of inspections. The inspection requirements speci- fied herein are classified as f
31、ollows7 a. First article inspection (see 4.2). b. Quality conformance inspection (see 4.3). 4.2 First article inspection. When specified in the contract or purchase order (see 6.2.31, a first article sample of 70 grains shall be delivered to the testing activity designated in the contract or purchas
32、e order. The first article sample shall be manufactured using the same methods, materials, processes, and procedures proposed for production. Any production prior to acceptance of the first article sample shall be at the risk of the contractor. 4.2.1 First article sample. The first article sample sh
33、all be subjected to the tests and inspections of Table III. a 4.2.1.1 First article acceptance criteria. Failure of any grain sample to meet the requirements specified herein, when subjected to the tests and inspections of Table III, shall cause rejection of the first article sample. 6 Provided by I
34、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I i i I I I I I I I I I I I l l I , i I l I I I I I i Inspect ions - F- Density MIL-G-85719(AS) TABLE III. First article inspections. Requirement Method 3.2.2 4.4.2 Inspections Compositlon Heat o explosion Burning r
35、ate MARK 264 igniter function or MARK 297 Igniter function Dens it y Composition He at o f explosion Burning rate Workmanship - 3.2.3 4.4.3 3.2.4 4.4.4 4.4.5 3.2.5 I Requirement Workmanship I 3.5 3.2.1.1 4.5 3.2.1.2 3.2.2 3.2.3 3.2.4 3.2.5 3.5 Nethod 4.4.1.1 4.4.1.2 4.4.2 4.4.3 4.4.4 4.4.5 4.5 . 4.2
36、.1.2 Test reports. When specified in the contract or purchase order (see 6.2.21, test reports, in accordance with MIL-STD-831, shall be pre- pared by the contractor for the contracting activity for all first article inspect ions. 4.3 Quality conformance inspection. Each production lot shall be sub-
37、iected to the tests and inspections o Table IV. 4.3.1 Production lot. A production lot shall consist of all grains from one batch of materials extruded in a continuous process, using the same procedures, equipment, and conditions. 7 Provided by IHSNot for ResaleNo reproduction or networking permitte
38、d without license from IHS-,-,-MIL-G-85719 13 H 9999906 0365806 T H MIL-G-85719(AS) . , 4.3.2 Sampling. Unless otherwise specified herein, sampling shall be in accordance with MIL-STD-105. 4.3.3 Quality conformance acceptance criteria. Failure of any produc- tion sample to meet the requirements as s
39、pecified herein, when subjected to the tests of Table IV, shall cause rejection of the production sample. 4.4 Test methods. Tests shall be performed using the test apparatus, ingredients, and procedures as specified herein. 4.4.1 Function tests. 4.4.1.1 MARK 264 igniter. Twenty-four grains shall be
40、loaded into ignit- ers in accordance with Drawing 1568376. The loaded igniters shall be tem- perature conditioned and fired in accordance with the function tests of WS-3853. The grains shall meet the requirements of 3.2.1.1. 4.4.1.2 MAIIK 297 igniter. Twenty-four grains shall be loaded into ignit- e
41、rs in accordance with Drawing 1204AS201. The loaded igniters shall be temperature conditioned and fired in accordance with the arm function tests of MIL-1-85326. The grains shall meet the requirements of 3.2.1.2. 4.4.2 Density. Ten grain samples shall be subjected to the density test of ASTM D 792,
42、except that the immersion agent shall be hexane. The den- sity of each grain sample shall meet the requirements of 3.2.2. 4.4.3 Composition. Composition of the grain shall be determined as follows : a. Weigh three 1-gram samples of the propellant to the nearest milligram. Digest each 1-gram sample i
43、n a 250-milliliter (mi) beaker with 75 ml reagent-grade acetone for not less than 16 hour s. b. Filter the sample through a weighed fine crucible. Acetone shall be used to transfer the sample from the beaker to the crucible. Dry the crucible with residue in an oven at 100 +3 degrees Celsius (“C) for
44、 not less than 30 minutes. C. Calculations: A = sample weight B = weight of crucible C = weight of crucible plus residue composed of PTFE and magnesium (irlg) 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-857L7 13 7779706 0365807 II E ! MIL
45、-G-85719(AS) I) = percent residue (PTFE and Hg) E = percent copolymer (C -B)/A X 100 = D 100 percent -D = E Percent copolymer shall meet the requirements of 3.2.3. d. Transfer the residue from the crucible with a stream of distilled water into a 250-ml glass joint flask. Add con- centrated hydrochlo
46、ric acid (HC1) to make a 2 to 3 normal (N) acid solution. Connect the flask to the condenser reflux apparatus and allow the sample to reflux until appearance of metal has been removed. e. Allow the original crucible to set with a solution of 2 to 3 N Wash the crucible HC1 in order to remove any rein
47、aining metal. well with distilled water and then wash with acetone to faci- litate drying. f. Transfer the sample of 4.4.3d into the original crucible. Dry the sample in an oven at 100 +3C for not less than 30 minutes. Cool the sample to room temperature in a desiccator and reweigh. Poly-TFE will be
48、 the final residue. g. Calculations : A = sample weight B = weight of crucible C = weight of crucible plus residue (PTFE and Mg) F = weight of crucible plus residue (PTFE) G = percent Mg H = percent residue PTFE (C -F)/A X 100 = G (F -B)/A X 100 = H Percent Mg (see G) and percent molding plastic (se
49、e H) shall meet the requirements of 3.2.3. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-85717 13 W 7777706 0365808 3 I 4.4.4 I-.- Heat of explosion. The grain shall be tested in accordance with HIL-STD-286. The grain heat of explosion shall meet the requirements of 3.2.4. 4.4.5 Burning rate. I- 4.4.5.1 - Test apparatus
