1、MIL-G-82938C 13 m 7777706 0360770 1 m MIL-G-82438C(OS) 13 Septepnber 1984 SUPERSEDING 26 SEPTEMBER 1975 MIL-G-82438B (OS) MILITRY SPECIFICATION GRAIN, IGNITER, PROPELLANT This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all
2、Depart- ments and Agencies of the Department of Defense. I SCOPE 1.1 Scope. This specification covers one type of propellant assembly containing pyrotechnic materials, carbon graphite spacer, and rubber pads. The propellant assembly is referenced herein as the “grain“. 2. APPLICABLF, DOCUMENTS 2.1 G
3、overnment documents. 2.1 I Specifications and standards. Unless otherwise Specified (see 6.2), the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation, form a part of this s
4、pecification to the extent specified herein. SPECIFICATIONS Federal QQ-s-763 Steel Bars, Shapes, and Forgings - Corrosion Resisting Military MILI - 82 437 Igniter STANDARDS . Military MIL-STD-.? o5 Sampling Procedures and Tables for Inspection by At tribut es Beneficial comments (recommendations, ad
5、ditions, deletions) and any pertinent data which may be of use in improving this document should by addressed to: Commanding Officer, Naval Ordnance Station, (524), Indian Head, MD 20640 by using the self-addressed Standardization/ Documentation Improvement Proposal (DD Form 1426) appearing at .fhee
6、nd of .ths documen?s or by let?er. , . I THIS .DOCUMENT CONTAINS - PAGES : FSC 1355 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-G-82438C 13 79797Ob O360771 3 W MIL-STD-I 29 MIL-STD-147 Marking for Shipment and Storage Palletized and Containe
7、rized Unit Wads 40 inch X 48 inch Pallets, Skids, Runners or Pallet Type Base Fuze and Fuze Components, Environmental and Perfor- mance Tests for MIL-STD-331 m 565 Set screw-Hexagon and Fluted Socket, Headless MS 16625 Ring, Retaining, Internal, Basic (Tapered Section Type) 2.1.2 Other Government do
8、cuments, drawings and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. DRAWINGS Naval Ordnance Systems Command DL 2541708 DL 2541709 Propellant Can Assembly Dwg 3209534 Propellant Assembly Dwg 2571090
9、 Combustion Chamber Shipping (Packing) Condition (For Eight Propellant As s ablies ) PWLICATIONS Naval Ordnce Systems Conimtixid (Code Ident. I O001 WD 30369 Preparation and Calibration, Proofing Configuration, Torpedo Mk 46 Mod 1 WS 4842 Torpedo Mk 46 Mod I Proof Procedure Requirwents and Acceptanc
10、e Criteria ( Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a par
11、t of this specif- ication to the extent specified herein. indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. The issues of the documents which are National Aerospace staadards NAS 1352-83 Screw, Cap, Socket Head - Undrilled and Drilled
12、, Plain and Self-Locking, Alloy Steel and Corrosion-Resisting Steel, UNRC-3A Thread NAS I593 Packing, Preformed - MIL-R-25897 Rubber, 75 Shore, O-Ring / 2, . :. - .- ,-. - ,. . -. . -. . . . : - . . . . I . -. i : . . Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
13、se from IHS-,-,-MIL-G-293C 13 977970b 0360772 5 U MIL-G-82438 (OS) (Application for copies should be addressed to Aerospace Industries Association of America, Inc., 1775 Desales Street, Washington, DC able for reference from libraries. groups and using Federal agencies.) 20036. ) (industry associati
14、on specifications and standards are generally avail- They are also distributed among technical e 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS “3 3.1 Cl
15、assification of requirements. The requirements for the grain are - “ classified as follows: _- REQUIREMENTS General Requirements Performance Requirements and Product Characteristics Environmental Requirements Operations1 Service Life 3.2 General requirements PARAGRAPH 3.2 3.3 3.4 3.5 3.2.1 First art
16、icle. When specified, a sample shall be subjected to first article inspection (see 6.2.1). a 3.2.2 Materials. Unless othersie specified in the contract or purchase order, all materials and treatments of materials used in the manufacture of the grain shall be in accordance wi.th the requirements list
17、ed in Dwg 3209534. 3.2.3 Definitions. Definitions of terms are listed in Section 6.3. 3.2.4 Formulation, process, or manufacturing equipment change. No changes of the formulation or manufacturing equipment shall be made without approval of the procuring activity after approval of the first article g
18、rains. 3.2.5 Conflicting requirements. In the event of conflict between the documents referenced herein and this specification, the requirements of this specification shall apply. 3.3 Performance requirements and product characteristics. Unless otherwise specified, the grain shall satisfy the follow
19、ing performance requirements and product characteristics when tested as specified in Section 4. 3.3. I Dimensions and weight 3.3.1.1 Dwg 3209534. Dimensions. Dimensions of the grain shall be in accordance with 3.3. I. 2 Weight. The weight of the grain shall not exceed 300 grams. a -. 3- Provided by
20、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-82438C 13 W 777770b 0360773 7 MIL-G-82438C (OS) 3.3.2 Auto-ignition 3.3.2.1 Low tem erature. The grain shall be capable of withstanding a temper- The grain is required, thereafter, to meet all ature of 170F +
21、 77OC at a relative humidity of less than 30 percent for a period of 2 hours without self-igniting. performance requirements and product characterics of this specification. 3.3.2.2 High temperature. The grain shall be capable of withstanding a temper- ature of 200F(930C) at a relative humidity of le
22、ss than 30 percent for a period of 8 hours without self-igniting. 3.3*3 Operational requirements 3.3.3.1 Pressure.response. The pressure response of the grain shall lie within the curves illustrated in FIGURES I, 2, and 3 when testing in accordance with 4.5.4.6, low temperature operating parameters;
23、 4.5.4.7, high temperature operating parameters; and 4.5.4.8, operational test parameters. 3.3.3.2 Low pressure operation. The pressure response of the grain shall lie within the curve illustrated in FIGURE 4 when tested in accordance with 4.4.6.18. 3.3.3.3 Combustion chamber temperatwe. The anticip
24、ated flame temperature in the combustion chamber should be approximately 2350OF. C* (characteristic velocity) equivalent to the 235O0F flpe temperature may be calculated in accordance with 3.3.3.3.1. mance data shall be determined in accordance with 4.4.6.17f and this value shall not exceed a maximu
25、m value of 3950 ft/sec. The maximum allowable The COmpUted C, based on actual perfor- 3.3.3. I Calculation of makimm allowable C*. The maximum allowable C* shall be calculated using the following equation. value based on the thermodynamic characteristics of the basis-propellant. This value of C* is
26、a theoretical c* = Where: (FT/SEC) Gc = 32.174 lbm-ft/lbfSEC2 (dimensional constant) (lbm = pound mass, lbf = pound-force) h = 1543.7 FT-lbf/MOLE - Ro (Gas constant) Tc = 28100R (235OOF gas temperature in OR) 6 = Theoretical specific heat ratio M = Theoretical average molecular weight in lbm/mole e
27、- NOTE: The manufacturer shall provide the theoretical value of 6 and E for the propellant as part of the preproduction and batch date package. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-82438C 13 m 7777706 0360774 7 MIL-G-82438C (OS) 3.
28、4 Environmental requirements. Unless otherwise specified, the grain shall be capable of conforming to the performance requirements and product character- istics of this specification after being exposed to the environmental conditions specified in this section. 3.4.1 Vibration 3.4. I .I Vibration, r
29、eady condition. The grain, mounted as shown in FIGURE 6, shall be capable of meeting performance requirements after being subjected, in the ready condition, to the vibrations defjned in TABLE I. The grain shall perpendicular transverse axes at any temperature within the range of -45F to +14F (-42.8“
30、C to +60c). B be vibrated for I80 minutes each in its logitudinal axis and in two mutually 3.4.1.2 Vibration, packaged condition. The grah shall be capable of meeting performance requirements after being subjected, in the packaged condition, to the vibrations shown in TABLE I. . TABLE I. Vibration s
31、chedule Condit ion Double amplitude Acceleration Frequency (in. 2 .?O%) (gis 10%) (Ha) . Packaged - 1.0 5 (minimum) Ready 3.4.2 Acceleration, ready condition. The grain, mounted as shown in FIGURE 6, shali be capable of meeting performance requirements after being subjected, in the ready condition,
32、to the accelerations defined in TABLE II for a duration of one minute for each magnitude. TABLE II. Acceleration schedule Magnitude (gs -I: 10% Acceleration direction (See FIGURE 6) 25 35 Longitudinal axis, fwd hngitudinal axis, aft -3 5 Provided by IHSNot for ResaleNo reproduction or networking per
33、mitted without license from IHS-,-,-I MIL-G-82438C(OS) I 3.4.3 Shock, ready condition. The grain, mounted as shown in F1GR.E 6, shall be capable of meeting performance requirements after being subjected, in the reaqv condition, to the shock loads defined in TABLE III. TABU III. Shock schedule Peak D
34、uration Impact Direction of Number Magnikude (ms) axis deceleration of (gis 2 10%) force impacts 300 85 85 45 60 60 60 60 0.5 to 1.5 0.5 to 1.5 8.0 to 1O.Q 0.5 to 1.5 18.0 to 20.0 8.0 to 10.0 8.0 to 10.0 8.0 to 10.0 Longitudinal Transverse A Transverse B Longitudinal Longitudinal Longitudinal Transv
35、erse A Transverse B Aft Optional Gy tional Fwd Aft Fwd Optional Optional 3.4.4 Temperatwe and iiiumidity 3.4.4.1 Nonoperating a. Temperature. The grain -shall be capble of meeting performance require- ments subsequent to withstanding, in the nonoperating condition, environmental temperatures between
36、 -45F and +I 40F (-42.8“C and +60C). b. Humidity. The grain shall be capable of meeting performance require- ments subsequent to withstanding, in the nonoperating condition, an environment of at least 95 percent relative humidity at (90F) 32.2OC for a minimum period of 12 hours. 3.4.4.2 Readz, r ope
37、 rating. The grain after being conditimed for 3 hours at any tem2erature between 0F and +140F (17.8“C and +60c) shall be capable of meeting performance requirements at any temperature between 0F and +lhOF (-17.9“C and +60c). 3.4.5 Jolt. The grain, mounted as shown in FIGW 6, shall be capable of with
38、stmaythe jolt test requirements of Test No. I01 of MIL-STD-331. is not required that the grain be operable after testing. the samples are judged to have withstood the testing are that (I) no explosive elements shall explode and (2) no parts shall be broken, be deformed, be displaced, come apart, or
39、arm, in such a manner as to make the assembly unsafe e0 handle or dangerous to use, as determined by examination. withstanding the jumble test requirements of Test No. 102 of MIL-STD-331. is not required that the grain be operable after testing. the samples are judged to have withstood the testing a
40、re that (I) no explosive elements shall explode and (2) no parts shall be broken, be deformed, be displaced, come apart, or arm in such a manner as to make the assembly unsafe to handle or dangerous to use, as determined by examination. It The criteria by which 3.4.6 Jumble. The.grain, in the nonope
41、rating condition, shall be capable of It The criteria by which Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-Z43C 13 7999906 0360776 2 W MIL-G- 82438C ( CH ) 3.4.7 Droe. The grain, in the nonoperating condition, shall be capable of The criter
42、ia by which withstanding the drop test requirements of Test No. IO3 of MIL-STD-331. It is not required that the grain be operable after testing. the samples are judged to have withstood the testing are that (I) no explosive elements shall explode and (2) no parts shall be broken, by deformed, be dis
43、placed, come apart, or arm, in such a manner as to make the assembly unsafe to handle-or dangerous to use, as determined by examination. a 3.4.8 Accelerated storage life 3.4.8.1 Packed and packaged condition. The grain, when packed with cushions and spacer that have been exposed to a minimum of 95 p
44、ercent relative humidity at IIOF (43OC) for 24 hours, shall be capable of withstanding an environmental temperature of 140F (60“) for a period of 30 days. be capable of meeting the requirem 3 Periodic production sample. Periodic production sampes shall be selected from units that have satisfactorily
45、 passed the quality conformance inspections of 4.5.4.1. at an activity designated by the procuring activity. sampling shall be as follows: These samples shall be subjected to the tests of 4.6 Periodic production a. Upon initiation of production, randomly select six units from each batch of grains. t
46、hree consecutive batches, proceed to 4.3.3. b, Upon satisfactory compliance of samples selected from b. Randomly select six units from every fifth batch of grains. Continue When a defective unit is found in my batch, acceptance of testing in accordance with 4.6 for the balance of the contract or unt
47、il a defect- ive unit is found. all units in that batch shall be withheld (see 6.2.1). 4.4 First article inspection 4.4.1 Tests and examinations. The Group A first article sample of five grains shall be subjected to the tests delineated in 4.4.2, sample of 25 grafns shall be subjected to the tests d
48、elineated in 4.4.3. The Group B first article 4.4.2 Grop A first article tests. The five grains shall be installed in a Mk 46 Mod I exercise configuration torpedo in accordance with WD 30369, and the launching plan, Appendix D, of WS 4842. Acceptance of the grain shall be based on the condition that
49、, after being ignited, the grain shall initiate the propul- sion system operation, and ignite the Otto Fuel, as evidenced by the torpedo exercise section data recording system. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-G-82Y3BC 13 W 7777706 0360777 B E MIL-G- 82 438C 4.4.3 Group B first article tests. shall be inspected in accord
