1、c t. -ir MIL-C-70784 13 797770b 0357580 3 m soici t a t ion. SPECIFICATIONS MIL I TARY NIL-C-70784 (AR) 1 April 1989 MILITARY SPECIFICATION CARTRIDGE, 25MM, ARMOR PIERCING DISCARDING SABOT TRACER (APDS-T) 4791, REFERENCE This specification is approved for use within the US Army Armament, Munitions a
2、nd Chemical- Command, and is available for use by all Departments and Agencies of the Departinent of Defense. 1. SCOPE 1.1 Scope. This specification covers requirements and quality assurance provisions for one type of percussion primed reference cartridge, designated as Cartridge, 25mm, APDS-T, M791
3、 to be used for calibrating acceptance testing equipment (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents 2.1.1 Specifications, standards and handbooks. The following specifications, standards and handbooks form a part of this specification to the extent specified herein. Unless otherwise
4、 specified, the issue of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISSI and su2plement thereto, cited in the MIL-A-2550 MIL-A-48078 STANDARDS MIL I TARY MIL-STD-105 - Ammunition, General Specification for - Ammunition, S
5、tandard Qualtiy Assurance Provisions, General Specification for - Sampling Procedures and Tables for Inspect ion by Attributes Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addrd to: Commander, U.S. Amy Arm
6、ament, Munitions, and Chemical Command, Attn. AMSMGQA, Picatinny Arsenal, New Jersey 07806-5000 by using the self-addrcsxd Standardization Document Improvement Prop4 (DD Form FSC 1305 IBUTIONST-T pL-Appr6Ta.i forpublic Elemi5 disfibution is unlimited. AMSC NIA Licensed by Information Handling Servic
7、es1 MIL-C-70784 33 7977706 0357583 5 m %-, 4 MII,-C-70784 (AR) MIL-STD-109 - Qual-ity Assurance Teims and Definitions i5T-Sn-129 - Yilitary Standard Marking for Shipment and MJ2-SmD-54 - Visual Inspection Standards and Inspecti-on Storage Procedures for Inspection of Packaging, Packing and Marking o
8、f Small Arms Ammunition Anmunit:on and Components MJL-STD-651 - Visual Inspection Standards for 20mm MIL-STD-1168 - Lot Numbering of Ammunition (TJnI.ess otherwise indicated, copies of federal- and military specifications, standars and handbooks are available from the Nave! PubJ-lcations an2 Forms C
9、enter, (ATTN: NPODS) , 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.1.2 Other Government documents, drawings and publications. - -I_ -_I_ The following other Government documents, drawings, and publications form a part o thi-s specification to the extent specified herein. UnTess otherwise spec
10、ified, the issues shall- be those in effect on the date of the solicitation. DRAWINGS US ARMY ARMAMENT RESEARCH, DEVELOPMENT, AND ENGINEERING CENTER (ARDEC) 9391393 - Interface Control Drawing, Maximum Profile and Alignment, Cartridge M791 12QlOOO!? - Reference Cartridge, 25mm, APDS-T, MY91 12013674
11、 - Shipping Container-Unlinked 25mm Ammunition 12 9 7- O 12 6 - Barrel, Yann, Transducer Location, 25mm 12910? 27 - Transducer, Piezoelectrj.c, Kristler 617C ASL201-3566 - 25mm Ammunition Ballistic Test Methods AS12013734 - Ammunition, 25mm, Packaging, Packing and (80 Rds) (Metric! Marking PUBLICATI
12、ONS Coile of Fefiera?. Regulations Title 49 - Interstate Commerce Commision Rules and Regulations for the Transportation of Explosives ans other Dangerous Articles (Copies of specifications, standards, drawings and publ.ications requtred by contractors in connection with specific procurement functio
13、ns should be obtained from the procuring activity or as directed 5y the contracting officer.) 2 Licensed by Information Handling Services- ir MIL-C-70784 13 = 7777706 0357582 7 (Code of Federal Regulation Title 49, Transportation Parts 100 through 199 are available from the superintendant of documen
14、ts, U.S. Government Printing Office, Washington, D.C. 20402. Orders should specify “49 CFR 100-199 (Latest Rev ision) ) 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, (except for associated detail specifications, specificat
15、ion sheets or MS standards) the text of this specification, take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless specific exemption has been obtained o 3. IIEQUIREMENTS 3.1 General. The cartxidge shall be in accordance with 7 Drawing 1291000
16、9, referenced specifications, publications and other requirements specified herein. a. Material. Materials shall be in accordance with applicable drawings and specifications., b. Manufacturing process. All parts and assemblies shall be manufactured by a process approved by the contracting officer, a
17、na no deviation from that process shall be made without prior approval of the contracting officer (see 6.7). 3.2 Projectile extraction The tensile force necessary to extract the projectile from the cartridge case shall be between 2000 and 3500 lbs. inclusive (see 4.4.1) o minimum of 30 in-lbs torque
18、 without rotational movement (see 3.3 Projectile - torque. The projectile shall withstand a 4.4.3). 3.4 Velocity. The average muzzle velocity of the sample cartridges shall be 1345 + 15 meters per second (mps) when conditioned at 210C + 3OC: The sample standard deviation shall not exceed 10 ZS (see
19、4.4.4). 3.5 Pressure, The average peak chamber pressure of the sample cartridges, conditioned at 210 + 3OC, plus three standard deviations of peak chamber pressure shall not exceed 454 megapascals (MPa). . No individual sample cartridge shall exceed 496 MPa. Pressure shall be measured with a piezoel
20、ectric type pressure transducer dwg. 12910127, located as specified on dwg. 12910126 (see 4.4.4) . 3 Licensed by Information Handling ServicesMIL-C-7078q 13 - 0b 0357583 9 m. 3.6 Waterproofness. The average velocity (wet) of projectil-es of the cartridges, conditioned at 210 f. 3OC, shall not vary f
21、rom the average velocity (dry) by more than 30.5 mps. The action time of the (wet) cartridges shall not exceed 6.0 milliseconds (ms) (see 4.4.4). 3.7 Dispersion. The standard deviation of impacts in both the horizontal and-vertical directions of the sample cartridge projectiles shall not exceed 0.38
22、 milliradians when the cartridges are conditioned at 210 30C (see 4.4.5). For this test, the test barrel will be fitted and fired with a muzzle brake. 3.8 Action time. The action time of the cartridges shall not exceed 6.0 ms at any cartridge temperature when conditioned at 210C - + 30C (see 4.4.6).
23、 visible tracewhen viewed against a dark background, for the minimum time of 1.4 seconds (sec) from the gun muzzle when conditioned at 210 2 30C (see 4.4.8). 3.9 Projectile trace. The sample projectile shall exhibit a 3.10 Function and casualty. The sample cartridges, conditioned at 210 + 3OC, shall
24、 function without firing defects and casualties (see 4.4.7) 3.11 Workmanship. All parts and assemblies shall be fabricated, 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, a
25、nd other foreign matter. The cleaning method used shall not be injurious to any parts, nor shall the parts be contaminated 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 sh
26、all be neat and clearly defined. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specifiedin the contract, the contractor is responsible for the performance of all inspection as specified herein. Except as otherwise specified in the contract, the contractor may us
27、e 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 the specification where such inspections are deemed necessary to assu
28、re supplies and services conform to prescribed requirements. Quality assurance terms and definitions shall be in accordance with MIL-STD-109 and the provisions of MIL-A-2550 and MIL-A-48078 apply. I 4 Licensed by Information Handling Services- MIL-C-70784 13 m 7977706 0357584 O m 4.1.1 Responsiblity
29、 Sor compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. inspection requirements in the specification shall not relieve the contractor of the responsi
30、bility of assuring that all products or supplies submitted to the Government of acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accepta
31、nce of defective material. The absence of any 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: Quality conformance inspection (see 4.3) 4-3 Quality conforinance inspection. - 4.3.1 Inspection lot formation. Inspection lots shall comply with t
32、he lot formation provisions of MIL-A-48078. 4.3.1.1 Component parts. Unless otherwise specified, component pacts shall be homogeneous and of a quantity convenient ta the contractor, except that each cartridge lot shall contain: . a. Cartridge cases from one unchanged process, from one lot interfix n
33、umber, and one manufacturer. b. Penetrators and sabots from one unchanged process, from one lot interfix number, and from one manufacturer. and one manufacturer. c. Primers from one lot, from one lot interfix number, d. Propellant from one lot and one manufacturer. 4.3.1.2. Assenibled cartridge lot.
34、 AL1 component parts shall meet the requirements-sfied in-2013566. Each lot of ammunition shall be identified as to type, caliber, and model, as well as a lot number in accordance with MIL-STD-1168, supplemented as directed by the procuring activity. Each packed lot of ammunition shall further be id
35、entified by a national stock number assigned by the procuring activity. The entire lot of reference cartridges shall be assembled and charged on a single loading machine 5 Licensed by Information Handling ServicesMIL-C-70784 13 B 977770b 0357585 2 t 4.3.2 Examination for defects. See MIL-A-48078. MI
36、L-STD-651 shall apply in defining and evaluating cartridge visual defects as applicable. vi- - a. -I- Critical defects. Unless otherwise specified, one hundred percent examination shall be performed for all critical defects If a visual critical defects is found in a sample either just pr or to a fir
37、ing test or after a firing test (and the defects is not due to the firing), the lot shall be rejected. The lot sha 1 then be rescreened and resubmitted for visual inspection of critical defects. If a critical defects is found during packing, the portion of the lot remaining to be packed shall be rej
38、ected. The lot shall then be rescreened and resubmitted for visual inspection of critical defects. 5. Major and minor defects. Major and minor defects shall be performed on a class basis in accordance with classification of defects using applicable sampling plans and acce2tance criteria of MIL-STD-1
39、05. All nonconforming car tridcjes shall be rejected. The following AQLs are assigned to major and minor defects: -_-I- Major . 0.25% Minor . 0.40% 4.3.3 -. Classification of .I_- defects. The classification of defects shall be as follows: 6 Licensed by Information Handling Services8 0, rl rl w 5 to
40、 -4 3 ti wa Bto 3; rl rl rlrl rlrl m mm mm . *. LI O CI -4 c tn .4 LI O LI R -4 LI pi tn c .4 tn to -4 R LI O Tj al +J LI .al 3 c H LI -4 LI 24 Tj c tn 3 c O -4 E O LL 7 Licensed by Information Handling Servicesa, u c a, Li a, Cl-l 2 rl a r- zl B I cn c n 2 z 4 In c1 4 a, tn a .d Li U LI a U MIL-C-7
41、074 13 m 777770b 0357587 b W rlrlrl rl a *A c 3m 33 NI dl rl rlrl rlrlrlrl mmmm mm mmmmmmmmm mm 0. rlrl rlrlrlrlrlrlrlrlrl . . rlrlrlrl a a, JJ !.4 a, 3 c .d LI O tn c rn rn -d .I4 E a, rn O O rl 4 I a, rn a u rn +J c a, CI O 2 E r I U C I- 3 e v) XI e 3 3 - E L O L v) a, 4 8 Licensed by Information
42、 Handling Servicesz O - H E; u w k v1 z H 2 O u N 2i t rl ic al u c al Li al W 2 rl o I- C i3 I cn . n 2 L E E rn N 4 al tn a .Pi Li U Li Id u x 4 a MIL-C-70784 13 8 9999906 0357588 8 M hlrlm m CHFW-CO o mmm m mmmm m . o. N rl4 III 400 rlm II ON 000. o 0000 N “N. w ww*w m (II (II al u Id Li P al d -
43、rl U u al *n O k LI Licensed by Information Handling Servicesa, u r: a, Li a, w 2 li cn P 4 E-1 I IA cl 2 L E E Ln cv 4 a, tn 5 .d Li U Li m u MIL-C-70784 13 W 777770b 0357587 T m 33 d( cy . . 6 5 n U I d d 10 U W ln 3 o 2, E c (d XE: o c .I- 3 * m Co c 3 3 Lo 33 L =c n Licensed by Information Handl
44、ing ServicesI -I MIL-C-70784 13 m 77777Ob 0357570 b m a a Cartridge: MIL-C-70 784 (AR) TABLE I. Firing defects - Misfire Failure to chamber Failure to extract Projectile remaining inbore Inbore sabot separation Primer : Primer leak Primer perforation Loose primer Blown primer Case: Longitudinal spli
45、t - i/ H or S G or J K, L or M Circumferential rupturet partial 1/ -2 Sr J or K G or L Ci r cumf er ent ia 1 rupture (complete) IJ Detached metal 2/ - Pro jecti1.e: Acc - 10 4 O 4 1 O O 25 6 1 1 31 11 1 11 4 1 1 Failure of the sabot, base, and nose Metal parts separation - penetrator cover to separa
46、te 3/ 2 and windscreen - 4/ 2 7 7 - 1/ cartridge cases. If a longitudinal split or circumferential rupture (partial) extends into two or more defined areas, only the most severe defect criterion of Table I for the areas involved shall apply. If a rupture results in separation of the cartridge case i
47、nto two or more portions, the defect shall be classified as a complete circumferential rupture. See Figure 1 for classifying splits and ruptures in fired- 11 Licensed by Information Handling Services MIL-C-707B4 33 9979906 0357593 B m. MIL-C-70784 (AR) - 2/ exterior, such as rim or neck shears, shal
48、l be classed as a defect. The lot shall not be penalized for shavings of inetal from the interior wall of the case neck in the crimped area. Metal sheared or missing rom the fired cartridge case 3/ Failure of the projectile(s) to separate, as evidenced by penetration of the target screen, shall be c
49、lassified as a defect. - 4/ Separation or breakup of penetrator and windscreen, as evidenced by recovering of part(s) or fragment(s) or hole(s) in the target: screen, shall be classed as a defect. 12 Licensed by Information Handling ServicesM flIL-C-707B9 13 I 977990b 0357592 T a I MIL-C-70784 Splits Ruptures 5 i J i- K L -i G-IN LINK GROOVE SECTION . G-IN LINK GROOVE SECTION H-IN MOUTH OR NECK S-IN NECK AND SHOULDER. J-IN MAIN BODY SECTION, NO J-IN UPPER 3/4 BODY SECTION K-IN LOWER 1/4 BODY SECTION CLOSER THAN 1/4
