1、- MIL-C-B5717 13 M 777770b 03b5772 B W FRT -g s-37-05 MiL-(2-857 7(AS) 12 AUGUST 1986 MILITARY SPECFICATION CARTRIDGE, 20 MILLIMETER, SEMI-ARMOK PIEKCINC HIGH EXPLOSIVE INCENDIARY, PGU-28/B This specification is approved for use within the Naval Air Systems Command, Department of the Navy and is ava
2、ilable for use by all Departments and Agencies of the Department of Defense. 1, SCOP distribution is unlimi t ed . _ . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-85723 STANDARDS Military MIL-STD-105 MIL-STD-129 MIL-STD-644 MIL-STD-651 MI
3、L-STD-810 MIL-STD-882 MIL-STD-1167 MIL-STD-1168 MIL-STD-1235 Projectile, 20mm Semi-Armor Piercing High Explosive Incendiary, PGU-28/B0 Sampling Procedures and Tables for Inspection by Attributes. Marking for Shipment and Storage. Visual Inspection Standards and Inspection Procedures for Inspection o
4、f Packaging, Packing and Marking of Small Arms Ammunition. Visual Inspection Standards for 20mm Ammunition and Components. Environmental Test Methods. System Safety Program Requirements. Ammunition Data Cards. Lot Numbering of Ammunition, Single and Multilevel Continuous Sampling Procedures and Tabl
5、es for Inspection by Attributes. 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. Unless other- wise specified, the issues shall be those in effect on t
6、he date of the soicitat ion. WCMENTS Naval Air System Command (Code Ident 30003) AR-68/47 AR-6 8 /4 8 20iiim Aainiuni tion, M50 Series (Belted With Links) MK 7 MOD O or MK 7 MOD 1, in Container M548. a 20mm Ammunition, M50 Series (Loose), in Container M548. Provided by IHSNot for ResaleNo reproducti
7、on or networking permitted without license from IHS-,-,-o o o 1 MIL-C-5727 13 7799706 03b577Lt I W - F- - DRAWINGS Naval Air Systems Command (Code Ident 30003) 15 75AS1 O0 1575AS 10 1 Department of the Army (Code Ident 19201) C7258801 7259023 7553815 PUBLICATIONS Cartridge, 20mm Semi-Armor Piercing
8、High Explosive Incendiary PGU-28/8. Projectile. Classifications of Defects, for Case, Cartridge, 20mm, M103, M103A1 and M103Bl. cartridge, 20mm, High Explosive Incendiary, M56A3. Case, Cartridge, 20mm M103. Code of Federal Regulations 49 CFR 100-199 Hazardous Materials Regulations, Department of Tra
9、nsportation. US Army Material Command AMCK 715-505 Ammunition Ballistic Acceptance Test Methods, Volume 8, Test Procedures for 20mm Cartridges. (Copies of specifications, standards, drawings, publications and other Government documents required by contractors in connection with specific acquisition
10、functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.1.3 Order o 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
11、 specification, however, ehall eupersede opplfcable laws and regulations iinleRoi a specific exemptlon has been obtained. 3. REQUIREMENTS. 3.1 Item description. The cartridge PGU-28/B shall be an all-up-round consisting of: a 20mm SAPHEX projectile, a M103 cartridge case with a MS2A3B1 eiectric prim
12、er and WC867 ball propellent . ._ . 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-857L7 13 m 7777906 0365775 3 MI L-C-85 7 1 7 (AS) 3 . 2 Characteristics . 3.2.1 Performance. 3.2.1.1 Chamber pressure. The average chamber pressure (x) plus
13、0.84 times the average range )shall be not greater than 60,500 pounds per square inch (psi) at 68 to 72 degrees Fahrenheit (OF). 3.2.1.2 Action time. The action time of the cartridge, conditioned at -65 to +160F, shall be not greater than 4.0 milliseconds (ms). 3.2.1.3 Velocity. The average velocity
14、 of the cartridges, conditioned at 68 to 72OP shall be 3410 250 feet per second (fps) at 78 feet 23 inches from the muzzle. The sample standard deviation shall be not greater than 40 fps. 3.2.1.4 Accuracy. The average mean radius of all target impacts resulting from sample cartridges, conditioned at
15、 68 to 72OP, shall be not greater than 15 inches at a range of 500 y8rda. 3.2.1.5 Projectile extraction. The force neceetiary to extrect the 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 withsta
16、nd a minimum torque of not less than 10 inch-pounds without rotationalmovement as specified on Drawing 1575AC100. 3.2.1.7 Projectile detonation. 3.2.1.7.1 Projectile sensitivity. The projectile shall detonate upon impact with a target of 0.063 f.0.005 inch thick 2024-T3 aluminum plate at O k10 degre
17、es obliquity at a distance of 600 13 feet. 3.2.1.7.2 Detonation delay. The projectile shall detonate upon impact with a target of 0.080 +0.005 inch thick 2024-T3 aluminum plate at O I10 degrees obliquity at a distance of 600 e3 feet with a delay not lese than 8 inches or greater than 24 inches. 3.2.
18、1.7.3 Projectile fragmentation. The projectile detonation shall provide not less than 8 penetrations in the last witness sheet of the specified target. 3.2.1.8 Penetration. The projectile shall demonstrate a probable ballistic limit (PBL) velocity of not greater than 2786 fps when fired against 0.37
19、5 inch armor (conforming to MIL-A-12560) at an obliquity of 45 degrees to the flight path of the projectile. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-85727 23 777770b 03b5776 5 MIL-C-857 17( AS) 3.2.1.9 Electrical resistance. The elect
20、rical resistance of the primed case shall be not greater than 1.2 Megohm nor less than 1000 ohms. 3.2.1.10 Function and casualty. The cartridge shall function at 68 to 72F and the projectile shall detonate without firing defects or casualties. 3.2.2 Environmental conditions. The cartridges shall mee
21、t the perfor- mance requirement6 of this spekizication after having been subjected to the environments specified in 3.2*2.1 and 3.2.2.2. velocity of projectgles of the sample cartridges submitted to the waterproofness teet; shall not vary from the average velocity of unexposed cartridges by more tha
22、n 100 fps. corrsion that will eause pitting or damage to the cartridge case on pro- jectile after exposure to salt fiog. Discoloration of the cartridge case or projectile shall not: consititutq failure. 3.2.2.1 Waterproofness. After conditioning at 68 to 72F the average 3.2.2.2 Salt fog. The cartrid
23、ge shall show no evidence of rust or 3.3 Design and comtruction. 3.3.1 Production drawings. The Cartridge shall be fabricated and I assembled in accofdan%e with Drawing 1575AS100. 3.3.2 Standards o manufacture. 3.3.2.1 Propellant contaminatiqn, The propellant shall be free from . -_ . contamination.
24、 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). 3.5 System safety. System safety shall assure safety for all personnel and equipment durzig all phases of test and operations, including storage, packaging
25、, handling and transportation. System safety engineering and management activities shall be is accordance with MIL-STD-882 (see 6.2.2). 3.6 Reliabilitye The cartridge shall have a performance of not more than one failure Ger 250,000 rQunds. have failed for the, purpose of cartridge reliability if an
26、y of the following Qccurs dus.ipg any tegt or examination: The cartridge shall be considered to a, A premature ignition, hangfire or misfire. b. A projectile structural failure. C. A failure that causes an armament system failure. 5 Provided by IHSNot for ResaleNo reproduction or networking permitte
27、d without license from IHS-,-,-NIL-C-857L7 13 9999906 0365777 9 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, scratches, dents
28、, 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 defect criteri
29、a specified in 4.8.2. stamping shall be neat and clearly defined. Ail required marking and 4. 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 inspection
30、 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 reserves the r
31、ight 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 inspection s
32、et 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 to the Gove
33、rnment 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- 4.2 Classification of inspections. The in
34、spection requirements specified herein are classified as follows: a. First article inspection (see 4.4). b. Quality conformance inspection (4.5). 4.3 Inspection conditions. Unless otherwise specified herein, all inspection shall be performed in accordance with the test conditions speci- fied in 4.3.
35、1 through 4.3.4.2. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.1 Calibration of instrumentation. To establish a reference baseline for testing the multipurpose cartridge specified herein, PGU-l7/B 20mm target practice cartridges shall be us
36、ed. 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 and action time shall also be recorded. The data shall be compared with the o
37、riginal lot acceptance test data of the reference lot. established. This baseline shall require consultation and acceptance by the Government (see 6.2.2). A baseline (XB) pressure and velocity shall be 4.3.2 Daily reference. During the tests of the cartridge, a minimum of 10 M55 cartridges per day a
38、re fired to establish a daily reference (XD) pressure and velocity. 4.3.3 Ballistic variation. Ballistic variation X for pressure and velo- city between the reference baseline and the daily reference is calculated as follows: Where : XB = Reference baseline XD = Daily reference The computed ballisti
39、c 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 deviatio+ Where computation of a sample standard deviation is specified for determination of lot acceptance, the method of computation will be: Where: x
40、i = each individual value X = sample arithmetic mean - n = sample size 4.3.4.2 Range. Where computation of the average Range (R) is specified, the individual values shall be recorded in subgroups of 5 in the order in which they are observed. the sum of the ranges shall be divided by the number of su
41、bgroups to deter- mine the R. - The ranges for the subgroups will be added and Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-85717 13 999990b 03b5779 O W 4.4 First article inspection. Unless otherwise specified in the contract or purchase ord
42、er, 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 approval (see 6.3). First article approval is valid only on the contract under which it is granted, unless specifically exte
43、nded by the contracting activity to other contracts. The first article sample shall be manufactured using the same methods, materials, processes, and procedures proposed for production. Any production prior to approval of the first article samples, shall be at the risk of the contractor. After appro
44、val 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 required. First article sample lot identification shall be in accordance with MIL-STD-1168. 4.4.1 First article test seq
45、uence. The tests listed in Table I shall be performed on the first article sample in accordance with the test methods prescribed in 4.6 (see 6.2.2). Except as otherwise specified herein, the tests shall be conducted with samples at 68 to 72F. Approval shall be based upon examination of the complete
46、sample for visual and dimensional characteristics listed in 4.5.3 and the tests listed in Table I. Tests 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 of the drawing
47、s and specifications shall be cause for sample disapproval. Determination as to acceptability of any first article sample shall be based upon results of initial test only and no second tests shall be permitted on that first article. The acceptance and rejection criteria for the first article sample
48、shall be as specified in Table I. All first article units shall be inspected 100 percent for critical defects. 4.4.3 First article sample failure criteria. Failure criteria shall be as defined herein during the examinations, and the tests of Table I shall be used to verify conformance to the applica
49、ble acceptance and rejection criteria . 4.5 Quality conformance inspection. 4.5.1 Submission of product. The product shall be submitted in accord- ance with MIL-STD-105 or MIL-STD-1235, as applicable. 4.5.1.1 Production lot. The production lot shall be not less than 25,000 cartridges and not more than 100,000 cartridges. A lot shall con- sist of: a. Cartridges loaded by one manufacturer using a projectile as specified in MI
