1、MIL-C-71138 = 999990b 1971775 O14 MIL-C-71138 (AR) 04 January 1994 MILITARY SPECIFICATION CARTRIDGE, 25MM, ARMOR PIERCING DISCARDING SABOT TRACER, M791 This specification is approved for use by the U.S. Army Armament, Munitions and Chemical Command, and is available for use by all Departments and Ag
2、encies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements, examinations and tests for one type of percussion primed cartridge for use in 25mm guns (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. Th
3、e following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto
4、, cited in the solicitation (see 6.2). SPECIFICATIONS MILITARY MIL-A-2550 - Ammunition, General Specification for MIL-A-12560 - Armor Plate, Steel, Wrouqht, Homoqeneous MIL-A-48078 - Ammunition, Standard Quaiity AssuGance MIL-P-71136 - Process Specification Ammunition, 25m, Provisions, General Speci
5、fication for Packaging, Packing and Marking Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document, should be addressed to: Commander, U.S. Army ARDEC, ATTN: SMCAR-BAC-S, Picatinny Arsenal, New Jersey 07806-5000 by using the
6、Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 1305 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. O Licensed by Information Handling ServicesMIL-C-71138 9999906 1971776 T50 MIL-C-71138
7、(AR) c STANDARDS MI LI TARY MIL-STD-109 - Quality Assurance Terms and Definitions MIL-STD-414 - Sampling Procedures and Tables for Inspections by Variables for Percent Defectives Inspection Procedures for Inspection of Packaging, Packing and Marking of Small Arms Ammunition Ammunition and Components
8、 MIL-STD-644 - Visual Inspection Standards and MIL-STD-651 - Visual Inspection Standards for 20mm MIL-STD-1168 - Lot Number of Ammunition (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the DODSSP - Customer Service, Standardiza
9、tion Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawinqs, and publi- cations. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise sp
10、ecified, the issues are those cited in the solicitation. DRAWINGS (see 6.5) U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (ARDEC) 5167214 9391399 12013533 12013668 12013671 12013674 12013688 12929427 Shipping and Storage Container, 25mm, Ammo, Belted with M28 Links Assembly Interfa
11、ce Control Drawing, Max. Profile and Alignment, Cartridge, M791 Cartridge, 25mm, APDS-T, M791 Container, Shipping and Storage, Plastic, Linked 25mm Ammunition Shipping Container-Linked 25mm Ammunition (50 Rds) Shipping Container, Unlinked 25mm Ammunition (80 Rds) Interface control Drawing for Cartri
12、dge, Packing and Marking for Container, Ammo PA125, for Linked 25mm Ammunition APDS-T, M791 2 Licensed by Information Handling ServicesMIL-C-JB W 9999906 1971777 977 MIL-C-71138 (AR) PUBLICATIONS FIGHTING VEHICLE SYSTEMS AS12013566 - 25mm Ammunition Ballistic Test Methods (Copies of other Government
13、 documents, drawings, and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Order of precedence. In the event of a conflict between the text of this document and the
14、 references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. (See contract provisions for additional precedence criteria.) 3. REQUIREMENTS 3.1 General. The cartridge
15、shall be in accordance with Drawing (Dwg.) 12013533, referenced specifications, publications, and other requirements specified herein. 3.2 Manufacturinq process. All parts and assemblies shall be manufactured by a process approved by the contracting officer, and no deviations from that process shall
16、 be made without his prior approval (see 6.10). 3.3 First article. When specified in the contract or O purchase order (see 6.21, a sample shall be subjected to first article inspection in accordance with the technical provisions herein (see 4.3) . 3.4 Projectile extraction. The tensile force necessa
17、ry to extract the projectile from the cartridge case shall be as specified by Dwg. 12013533 (see 4.6.1). 3.5 Projectile torque. The projectile shall withstand the minimum torque as specified by Dwg. 12013533 (see 4.6.3). 3.6 Velocity. The average muzzle velocity of the sample cartridges, conditioned
18、 at 18C to 24“C, shall be 1345 k 20 meters per second (mps). The sample standard deviation shall not exceed 13 mps (see 4.6.4). 3 Licensed by Information Handling ServicesMIL-C-7LL38 m 9999906 1971778 823 MIL-C-71138 (AR) 3.7 Pressure. The average peak chamber pressure of the sample cartridges condi
19、tioned at 18“ to 24“C, plus three standard deviation of peak chamber pressure, shall not exceed 454 mega- pascals (MPa). The average peak chamber pressure of the cartridges, when functioning at any individual temperature from - 54“ to 62“C, plus two standard deviations of peak chamber pressure, shal
20、l not exceed 496 MPa, and no individual sample cartridge shall exceed 496 MPa. (Pressure shall be measured with a piezoelectric type pressure transducer or equivalent (see 4.6.4) .) 3.8 Waterproofness. The average velocity (wet) of projectiles of the sample cartridges, conditioned at 18“ to 24“C, sh
21、all not vary from the average velocity (dry) by more than 30.5 meters per second. The action time of the (wet) cartridges shall not exceed 6.0 milliseconds (ms) (see 4.6.4). 3.9 Accuracy. The standard deviation of impacts in both the horizontal and the vertical directions of the sample cartridge pro
22、jectiles shall not exceed 0.44 milliradians when the sample cartridges are conditioned at 18“ to 24C (see 4.6.5). 3.10 Action time. The action time of the sample cartridges shall not exceed 6.0 milliseconds at any cartridge temperature from -54“ to 62C (see 4.6.6). 3.11 Projectile trace. The project
23、ile shall exhibit a visible trace when viewed against a dark background, for a minimum time of 1.4 seconds (sec) from the gun muzzle at any cartridge temperature from -32“ to 52C (see 4.6.7). 3.12 Function and casualty. The cartridge, at 20“ f 10C shall function without firing defects and casualties
24、 (see 4.6.8). 3.13 Penetration. Subprojectiles of sample cartridges shall exhibit a V, of 1180 mps maximum against 1.000 inch armor plate at an obliquity of 60“. The armor plate shall be in accordance with MIL-A-12560 Class 3 (see 4.6.9). 3.14 Workmanship. All parts and assemblies shall be fabricate
25、d, loaded, and assembled in a thorough workmanship manner. They shall be free of burrs, sharp edges, cracks, scratches, dents, folds, wrinkles, buckles, dirt, grease, oil, rust, and other foreign matter. The cleaning method used shall not be injurious to any parts, nor shall the parts be con- tamina
26、ted by the cleaning agents. Exterior surface coatings shall be continuous; however, light scratches not exposing base material may be permitted. All required marking and stamping shall be neat and clearly defined. 4 Licensed by Information Handling ServicesMIL-C-LL38 W Ob LL779 bT W MIL-C-71138 (AR)
27、 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contra
28、ct or purchase order, the contractor may use his own or any other facilities suitable for the performance 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 this specification where s
29、uch inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requirements of Sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspe
30、ction system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspecti
31、on, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.1.2 General Drovisions.
32、Unless otherwise specified herein, the provisions of MIL-A-48078 apply and form a part of this specification. Reference shall be made to MIL-STD-109 to define quality assurance terms used herein. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follow
33、s: a. First article inspection (see 4.3). b. Quality conformance inspection (see 4.4). 4.3 First article inspection. 4.3.1 Submission. Prior to production, a sample shall be submitted in accordance with contract requirements and shall consist of 650 cartridges, 125 primed cases and 125 traced projec
34、tiles (see 6.3). The sample shall be manufactured using similar equipment, processes and procedures as will be used in production. Identification shall be in accordance with MIL-STD- 1168. 5 Licensed by Information Handling Services4.3.2 Inspections to be performed. The tests listed in Table I shall
35、 be performed on the first article sample in accordance with the test methods prescribed in 4.6. Except as otherwise specified, tests shall be conducted with samples at 20 k 10C. Approval will be based upon examination of the complete sample for visual and dimensional characteristics listed in 4.4.2
36、 and tests listed in Table I. 4.3.3 Rejection. If any assembly, component or test specimen fails to comply with any of the applicable requirements, the first article sample shall be rejected. The Government reserves the right to terminate inspection upon any failure of an assembly, component or test
37、 specimen to comply with any of the requirements. In the event of rejection, the Government reserves the right to require the contractor to take corrective action and submit a new First Article quantity. 6 Licensed by Information Handling ServicesMIL-C-7LL38 b L7L7BL 3LB I Cu 8 rl t w I ul rl CI1 Cu
38、 CJ * di * d m CJrinimddiWdln diWWWWWWWW dd*cdd*didi . . d rl m m * O rl*rilnL?uJrimcn mmmmmmmmm . Ln Ln Cu Cu rl d m JJ u a, Cu a, a k O w C O *ri JJ a C -ri E a X w *I *I JJ uc O w -ri a,JJ au (d kk OJJ wx a, C oa, -d 4 JJ -rl aJJ CU .rl a, E -n ao Xk wP( 2 C O m O0 a, c ii k 0 +I W JJ CJ xa, + oc
39、 a,. ea u tn.2 k cri4 L; U JJ UV) a,JJ wu a, au a, a,a c O0 3 cJJ O 7 Licensed by Information Handling ServicesI- V) W t U O Z U F W MIL-C-71138 i999Ob 1971782 254 r- u) Tr d d r) nim dd mn oooou) mmmo N r-l r-l u tn a, a m u tn a, a O d u 0 a, a m O c x E c u -4 c 3 Ln u) b.4 a A. rl Id O P Ln 4 k
40、O Ir, 8 Licensed by Information Handling ServicesMIL-C-7L138 9999906 1971783 190 D MIL-C-71138 (AR) 4.4 pualitv conformance insDection. 4.4.1 InsDection lot formation. The term “inspection lot“ is defined as a homogeneous collection of units of product from which a representative sample is drawn or
41、which is inspected 100 percent to determine conformance with applicable requirements. Units of product selected for inspection shall represent only the inspection lot from which they are drawn and shall not be con- strued to represent any prior or subsequent quantities presented for inspection. Homo
42、geneity shall be considered to exist pro- vided the inspection lot has been produced by one manufacturer, in one unchanged process, using the same materials and methods, in accordance with the same drawings, same drawing revisions, same specifications and same specification revisions. All material s
43、ubmitted for inspection in accordance with this speci- fication shall comply with the homogeneity criteria specified herein, regardless of the type of inspection procedure which is being applied to determine conformance with requirements. 4.4.1.2 m. A lot shall consist of: a. Cartridges loaded by on
44、e manufacturer, in one unchanged process, in accordance with the same drawings and drawing revisions, and the same specification and specification revision. b. Like parts and assemblies (cases; primers; projectiles; tracer and ignition systems) having one manufacturers symbol and one interfix number
45、. c. Propellant from one lot. 4.4.1.3 Lot identification. Each cartridge and each packed ammunition lot shall be identified in accordance with applicable drawings and MIL-STD-1168, supplemented as directed by the procuring activity. Each packed lot shall further be identified by a national stock num
46、ber assigned by the procuring activity. 4.4.2 Examinations and tests. a. Classification of characteristics. Quality conformance examinations and tests are specified in the following Classifi- cation of Characteristics paragraphs. The contractors quality program or detailed inspection system shall pr
47、ovide assurance of compliance of all characteristics with the applicable drawing and specification requirements utilizing as a minimum the conformance criteria specified. When cited herein, attributes sampling inspection shall be conducted in accordance with Table II, using the inspection levels sta
48、ted in the Classification of Characteristics paragraphs. 9 Licensed by Information Handling ServicesMIL-C-7LL38 77799Ob 1771784 O27 W MIL-C-71138 (AR) TABLE II. Attributes sample inspection. Lot Size 2 to 8 9 to 15 16 to 25 26 to 50 51 to 90 91 to 150 151 to 280 281 to 500 501 to 1200 1201 to 3200 3
49、201 to 10000 10001 to 35000 35001 to 150000 150001 to 500000 500001 and over inspection Levels II - * * * * 50 50 50 50 75 116 116 135 170 200 244 V - IV - 5 8 5 8 5 8 5 8 7 12 11 19 13 21 16 27 19 35 23 38 29 46 35 56 40 64 40 64 40 * Numbers under inspection levels indicate sample size; asterisks (*) indicate one hundred percent inspection If sample size exceeds lot size, perform one hundred percent inspection. Accept on zero and reject on one or more for all insDection levels. b. Alternative Quality conformance provisions. Unless otherwise spec
