1、3-37-03 WIL-C-85764 (AS ) 12 AUGUST 1986 MI LI TARY SPECIFICATION CARTRIDGE, 20 MILLIMETER TARGET FRACTICE, PGU-27/B and CARTRIDGE, 20 MILLIMETER TARGET PRACTICE-TRACER, PGU-30/B This specification is approved for use within the Maval Air Systems Command, Department of the Navy and is available for
2、use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for manufac- ture and acceptance of the Cartridge, 20 millimeter (mm) , Target Practice, PGU-27/B and the Cartridge, 20 Millimeter, Target Practice-Tracer, PGU-30/B.
3、1.2 Classification. The classification of the cartridges referred to herein are as follows: a. Ty-peI Cartridge, 20 Millimeter Target Practice, PGU-27/B. b. !Lype II Cartridge , 20 Millimeter , Target Practice, PGU-30/B. Beneficial comments (recommendations , additions , deletions and any pertinent
4、data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Engineering Center, Systems Engineering and Standardization Department (SBSD) , Code 93, Lakehurst , NJ 08733-5100 , by using the self-addressed Standardization Document Improvement Proposal (DD
5、 Form 1426) appearing at the end of this document, or by letter. AMSC N3933 FSC 1305 DISTRIBUTION STATESIENT A. Approved for public release; distribution is unlimited. f THIS DOCUMENT CONTAINS 85 PAGES. -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
6、,-,-2. 2. MIL-C-85764 (AS) APPLICABLE DOCUMENTS Government documents. 2.1.1 Specifications and standards. The following specifications 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 th
7、e issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. SPECLFICATIONS Military MIL-P-85766 MIL-P-85767 STANDARDS Mil it ary MIL-STD-105 MIL-STD-I29 M IL-S T - 6 4 4 MIL-STD-651 MIL-STD-810 MI L-S TD-8 8 2 NXL-STD-1167 MI
8、L-STD-1168 Projectile, 20m, Target Practice- Tracer PGU-30/Be Projectile, 20mm, Target Practice PGU-2 7 /B . Sampling Procedures and ables for Inspection by Attributes. Marking for Shipment and Storage. Visual Inspection Standards and Inspection Procedures for Inspection of Packaging, Packing and Ma
9、rking of Small Arms Ammunition. Visual Inspection Standards for 2Dmm Ammunition and Components. Environmental Test Methode and Engineering Guidelines. System Safety Program Requirements. Ammuni t on Da ta Cards . Lot Numbering of Ammunition. 2. Provided by IHSNot for ResaleNo reproduction or network
10、ing permitted without license from IHS-,-,-MIL-C-57bq 13 9797906 03b57b5 I MIL-STD-1235 Single and Multilevel Continuous Sampling Procedures and Tables for Inspection by Attributes. 2.1.2 Cither Government documents, drawings, and publications. The following other Government documento, drawings, and
11、 publications form a part of this specification to the extent specified herein. Unless other- wise specified, the issues shall be those in effect on the date of the solicitation. DOCUMENTS Naval Air Systems Command (Code Ident 30003) AR-68/47 AR-6 8 /4 8 DRAW1 NGS Naval Air Systeme Command (Code Ide
12、nt 30003) 1575AS300 1 5 7 5AS3 O1 1575AS400 I575AS401 Department of the Army (Code Ident 19201) C7258801. 7259023 7553815 20mm Ammunition, M50 Series (Belted with Links) MK 7 MOD O or MK 7 MOD 1, in Container M548. 2Omm Ammunition, M50 Series (Loose), in Container M548. Cartridge, 20mm, Target Pract
13、ice, PGU-2 7 /B . Proj ec t ile. Cartridge, 20mm Target Practice- Tracer, PGU-30/B6 Projectile. Classifications of Defects, for Caee, Cartridge, 20mm, M103, M103Al and M103B1. Cartridge, 20m, High Explosive Incendiary, M56A3. Case, Cartridge, 2Om, M103, M103A1, and M103Bl. 3 Provided by IHSNot for R
14、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-85764 13 M 79777Ob 03b57bb T L P PUBLICATIONS Code of Federal Regulations 49 CFR 100-199 US Army Material Command AMCR 715-505 Hazardous Materials Regulations, Department of Transportation. Ammunition Ballistic Acceptanc
15、e Test Methods, Volume 8, Test Procedure for 20mm Cartridges. (Copies of specifications, standards, 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
16、contracting activity.) 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this speci- fication shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a
17、specific exemption has been obtained. 3. REQUIREMENTS 3.1 Item description. The cartridges, PGU-i7/B and PGU-30/B shall be all-up-rounds consisting of: a 20mm target practice or 20mm target prac- tice tracer projectile, a M103 cartridge case with a M52A3B1 electric primer and WC867 ball propelient .
18、 3.2 Characteristics. 3 . 2 . 1 Perf ormance . 3.2.1.1 Ghamber pressure. The average chamber pressure (x) plus 0.84 times the average range (R) shall not exceed 60,500 pounds per square inch (psi) 3.2.1.2 Action time. The action time of the cartridge shall be not greater f.han 4.0 milliseconds (ms)
19、. 3.2.1.3 Velocity. The average velocity of the cartridges conditioned at 68 to 72 degrees Fahrenheit (OF) shall be 3410 *50 feet per second (fps), at 78 feet t3 inches from the muzzle. The sample standard deviation shall be not greater than 40 fps. 4 Provided by IHSNot for ResaleNo reproduction or
20、networking permitted without license from IHS-,-,-MIL-C-857bLI I3 7997906 03b5967 I 3.2.1.4 Accuracy. The average mean radius of all target impacts resulting from sample cartridges conditioned at 68 to 72F shall be not greater than 15 inches at a range of 500 yards. 3.2.1.5 Projectile extraction. Th
21、e force necessary to extract Che pro- jectile from the cartridge case shall be not greater than 2,800 pounds nor less than 1,100 pounds. 3.2.1.6 Projectile torque. The projectile shall withstand a torque of not less than 10 inch-pounds without rotational movement in the cace. 3.2.1.7 Electrical resi
22、stance. The electrical resistance of the primed case shall be not greater than 1.2 Megohms nor less than 1000 ohms. 3.2.1.8 Projectile trace. (Type II only) The projectile shall exhibit a visible trace, when viewed against a dark background, upon ignition of the trace mixture in the barrel and conti
23、nue to trace for not less than 2.5 seconds nor more than 4.5 seconds after cartridge ignition. 3.2.1.9 Function and casualty. .The cartridge shall function at 68 to 72F without firing defects and casualties. 3.2.2 Environmental conditions. The cartridge shall meet the perfor- mance requirements of t
24、his specification after having been subjected to the environments specified in 3.2.2.1 and 3.2.2.2. 3.2.2.1 Waterproofness. After conditioning at 68 to 72“F, the average velocity of projectiles from cartridges previously submitted to the - waterproofness test shall not vary from the average velocity
25、 of projectiles from unexposed cartridges by more than 100 fps. 3.2.2.2 Salt fog. The cartridge shall show no evidence of rust or corrosion that will cause pitting or damage to the cartridge case or pro- jectile after exposure to salt fog. Discoloration of the cartridge case or projectile shall not
26、constitute failure. 3.3 Design and construction. 3.3.1 Production drawings. The cartridge shell be fabricated and assembled in accordance with Drawing 1575AS300 (Type I) or 1575AS400 3.3.2 Standards of manufacture. 3.3.2.1 Propellant contamination. The propellant shall be free from all contamination
27、. 3.4 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.4 and 6.3). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-C-857b4 13 77777Ob 03b57b 3 3.5 System safety. Sy
28、stem safety shall assure safety for all personnel and equipment during all phases of test and operations, including storage, packaging, handling and transportation. System safety engineering and management activities shall be in accordance with MIL-STD-882 (see 6.2.2) 3.6 Reliability. The cartridge
29、shall have a performance reliability of not greater than one failure per 250,000 rounds. The cartridge shall be considered to have failed for the purpose of cartridge reliability if any of the following occurs during any test or examination: a. A premature ignition, hangfire or misfire. b. A project
30、ile structural failure. C. A failure that causes an armament system failure. 3.7 Workmanship. All parts and assemblies shall be fabricated, loaded, and assembled in a manner that will assure compliance with all requirements of this specification. They shall be free of burrs, sharp edges, cracks, scr
31、atches, 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 contaminated by the cleaning agents. Exterior surface coatings shall be continuous. Light scratches shall not exceed the de
32、fect criteria specified in 4.8.2. All required marking and stamping shall be neat and clearly defined. 40 QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order (see 6.2.1), the contractor is responsible for the performance of all
33、 inspection requirements as specified herein. Except as otherwise specified in the contract 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 res
34、erves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements . 4.1.1 Responsibility for compliance. All items must meet all require- ments of Sections 3 and 5. The
35、inspection set forth in this specification shall become a part of the contractors overall inspection system or 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
36、 to the Government for acceptance comply with all requirements of the contract. 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- 6 Provided by IHSNot for Res
37、aleNo reproduction or networking permitted without license from IHS-,-,-L VIL-C-85764 13 E 977770b 03b.5767 5 a B a 4.2 Classification of inspections. The inspection requirements speci- fied herein are classified as follows: a. First article inspection (see 4.4). b. Quality conformance inspection (s
38、ee 4.5). 4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with the test conditions speci- fied in 4.3.1 through 4.3.4.2 as follows. 4.3.1 Calibration of instrumentation. To establish a reference baseline for testing the multipurpose cartr
39、idge specified herein, PGU-27/B 20mm target practice cartridges shall be used. Twenty cartridges from the reference lot shall be fired from the standard barrel and test stand and the data recorded. Holes shall be drilled in accordance with AMCR 715-505 to obtain the chamber pressure. The velocity an
40、d action time shall also be recorded. The data shall be compared with the original lot acceptance test data of the reference lot. A baseline (X ) pressure and velocity shall be established. This baseline shall require consultation and acceptance by the Government (see 6.2.2). of ten b55 cartridges p
41、er day are fired to establish a daily reference (X ) pressure and velocity. B 4.3.2 Daily reference. During the testing of the cartridge, a minimum D 4.3.3 Ballistic variation. Ballistic variation “X“ for pressure and velocity between the reference baseline and the daily reference is calcu- lated as
42、 follows: Where: X = Reference baseline x=xB-% B XD = Daily reference The computed ballistic variation “X“ for pressure and velocity is utilized in 4.6.1.1 and 4.6.1.3 to establish corrected performance. 4.3.4 Computations. 4.3.4.1 Standard deviation. Where computation of a sample standard deviation
43、 is specified for determination of lot acceptance, the method of computation shall be: C(Xi -X)2 s= or equal Where: Xi = each individual value X = sample arithmetic mean I n = sample size 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-C-57bL1
44、 13 99799Ob 0365970 L W 4.3.4.2 - Range. Where computation of the average Range (E) is specified, the individual values shall be recorded in subgroups of 5 in the order in which they are observed. The ranges for the subgroups shall be added and the sum of the ranges shall be divided by the number of
45、 subgroups to deter- mine the R. 4.4 First article inspection. Unless otherwise specified in the contract or purchase order, the contractor. shall furnish a first article sample of 600 cartridges to the testing activity designated in the contract or purchase order for first article inspection and ap
46、proval (see 6.3). First article approval is valid only on the contract under which it is granted, unless specifically extended by the contracting activity to other contracts. The first article sample shall be manufactured using the same methods, materials, processes, and procedures proposed for prod
47、uction. Any production prior to approval of the first article samples shall be at the risk of the contractor. After approval of the first article sample changes in material, processes, procedures, or design shall require prior written approval from the contracting activity and requalification may be
48、 required. First article sample lot identification shall be in accordance with MIL-STD-1168. 4.4.1 First article test sequence. The tests listed in Table I shall be performed on the first article sample in accordance with the test methods described in 4.6 (see 6.2.2). Except as otherwise specified h
49、erein, the tests shall be conducted with samples at a temperature of 68 to 72F. Approval shall be based upon examination of the complete sample for the visual and dimensional characteristics listed in 4.5.3 and the tests listed in Table I. Test may be performed in any sequence. The combining of tests shall be permitted (see 6.6). 4.4.2 First article sample rejection. Inability of the sample to comply with the requirements
