1、MIL-P-5662 13 a 9799906 0365676 L 5-3FLxf MIL-P-85662 (AS) 22 July 1985 MILITARY SPECIFICATION PROPELLANT, BALL, 25 MM, ARMOR PIERCING INCENDIARY (API) , PGU-2O/U This specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by all Departme
2、nts and Agencies of the Department of Defense. 1. SCOPE. 1.1 Scope. This specification establishes the requirements for one type of propellant for use in 25 millimeter (mm) cartridges, PGU-2O/U Armor Piercing Incendary (API). 2. APPLICABLE DOCUMENTS. 2.1 Government documents. 2.1.1 Specifications an
3、d standards. Unless otherwise specified, 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 specification to the extent specified herein. SPEC IF IC
4、ATIONS Military MIL-N-244 MIL-A-2550 Nit roce1 1 u1 ose. Ammunition, General Specification for. Beneficial comments (recommendations, additions, deletions) and any per- tinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Engineering Center
5、, Systems Engineering and Standardization Department (SESD) , Code 93, Lakehurst, NJ 08733, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. THIS DOCUMENT CONTAINS /y PAGES “ “DISTRIBUTION STATEMENT A. Approv
6、ed for public release; distribution is unlimited.“ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-85662 13 m 7777906 0365677 3 IT STANDARDS Mi 1 itary MIL-STD-105 Sampl ing Procedures and Tab1 es for Inspection by Attributes. MI L-STD-109 Qual
7、 ity Assurance Terms and Definitions. MIL-STD-286 . MI L-STD-1168 Propellents, Sol id; Sampl ing, Examination and Testing. Lot Numbering of Ammunition. 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and pub1 ications form a part of t
8、his .specification to the extent specified herein. DRAW I NGS - . U.S. Army Armament Research an Deve1 opment Command (Code Ident 19200) 20-4-77 76-4-46 7 6-4 - 5 6 7549033 8858577 8858848 9256486 Packing and Marking of Box, Packing, for Smokeless Powders. BOX, Packing, Metal Liner (Copper), M24, fo
9、r Smokel ess Powders . Box, Packing, Metal-Wood, M17 for Smoke1 esc Powders. Container, Metal, Universal, M25 for Propel 1 ant and Expl os! ves, Assembly and details. Marking Diagram and Sealing Con- tainer, Metal, Universal, M25 for Shipping of Propel 1 ant. Marking Diagram and Sealing of Metal Lin
10、ed Wooden Packing Boxes for Ship- ment of Propellant. Container, Packing PA 54, Wood with Metal Liner (Modified M24 Box for Smokel esc Powder) . 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-85662 13 7777906 0365678 5 Naval Air System Comma
11、nd (Code Ident 30003) 1397AS138 Propel lant , Bal 1 , 25 mm, API , PGU-2O/U. 1397AS190 Cartridge, 25 mm, API, PGU-2O/U. PUBL IC AT IONS Fighting Vehicle Systems AS12013566 Code of Federal Regulations (CFR) 49 CFR 171-190 25-Mill imeter Ammunition Ball istic Test Met hods . Hazardous Materials Regula
12、tions, Department of Transportaticm. . DoD Manual 4145.26M Safety Manual. (Application for copies of Code of Federal Regulations should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D.C. 20402,) (Copies of specifications, standards, handbooks, drawings, and
13、 pub1 ica- tions required by manufacturers in connection with specific acquisition functions should be obtained from the c,ontracting activity or as directed by the contracting officer.) 2.1.3 Order of precedence. In the event of a canflict between the text of this specification and the references c
14、ited herein, the text of this specification shall take precedence, 3. REQUIREMENTS. 3.1 Chemical and physical properties, The chemical and physical proper- ties of the propellant shall be as specified in Drawing 1397AS138. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
15、t license from IHS-,-,-MIL-P-85662 13 9999906 0365679 7 MIL-PL85662 (AS) 3.1.1 Air space. .The propellant charge weight that is required to. achieve the ballistic requirements of 3.2 and that conforms to the requ ments of Drawing 1397AS190 shall result in an air space in the primed cartridge case, w
16、hich shall permit the insertion of the API projectile re- nto .- the charged case without anyvibration or tamping to cause compaction of the propel 1 ant charge. 3.1.2 Nitrocellulose. Unless otherwise specified in the contract or purchase order (see 6.2.1), nitrocellulose recovered from the rework o
17、f propellants or new nitrocellulose with the nitrogen content not fully meeting the requirements of MIL-N-244 may be used in lieu of, or in combination with, complying nitrocellulose. Propellant so manufactured shall comply with all chemical, physical, and ballistic requirements. 3.2 Internal ball i
18、stic performance. The propellants internal bal- listic performance shall be sampled as specified herein when loaded into representative API Cartridges conforming to Drawing 1397AS190 and fired in the approved specified GAU-lZ/U single-shot barrel and test fixture. 3.2.1 Muzzle velocity. The average
19、muzzle velocity of the sample cartridges, conditioned at 18 to 24 degrees Celsius (OC), shall be not less than 1,000 meters per second (m/s). (see 6.4) shall not exceed 10 m/s. At any cartridge temperature from -54 to 71“C, the projectile muzzle velocity shall be greater than 950 meters per second.
20、3.2.2 Pressure. The average chamber pressure of the sample car- tridges, conditioned at 18 to 24C plus three standard deviations of chamber pressure, shall be not greater than 425 megapascals (MPa). The average chamber pressure of the sample cartridges, when functioning at any individual temperature
21、 from -54 to t71“C plus three standard devia- tions of chamber pressure, shall be not greater than 476 MPa. Pressure shall be measured with a piezoelectric type pressure transducer or equi val ent. 3.2.3 Action time. The action time of the sample cartridges shall be not greater than 6.0 milliseconds
22、 (ms) at any cartridge temperature from The sample standard deviation -54 to 71C. 3.2.4 Special action time. The action time requirement of 3.2.3 shall al so be achieved with the propel 1 ant in the “powder-to-bu1 1 et“ orienta- tion with the ammunition conditioned at -54C: bel ow the establ ished c
23、harge weight shall be used. A charge weight 3 grams 3.3 Flame temperature. The propellant shall have an isochoric flame temperature of not qreater than 2,800“ Kelvin (K) as determined by the Hirschfelder method-of calculation. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
24、thout license from IHS-,-,-MIL-P-5662 13 M 7779706 03bSb0 3 I MIL-P-85662 (AS) 3.4 First article sample. When specified, a Sample shall be subjected to first article inspection (see 6.2.3) O * 3.5 Toxic products and safety. Safety regulations and guide1 ines appl icable to the production and use of
25、the propellant shall be compl ied with to preclude personal injury and damage to equipment and facilities. order (see 6.2.2), the propellant shall be manufactured by a process approved by the contacting officer, and no deviations from that process shall be made without his prior approval. 3.6 Manufa
26、cturing process. When specified in the contract or purchase 3.7 Workmanship. The workmanship shall be such that the propellant is uniform in appearance, consistent in high quality, and free from visible contamination. 4. QUALITY ASSURANCE PROVISIONS. 4.1 Responsibility for inspection. Unles, otherwi
27、se spe ified in the contract or purchase order (see 6.2.1), the contractor shall be respon- sible for the performance of all inspection requirements as specified herein. own facil ities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the
28、 inspections set forth in this specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. Except as otherwise specified, the contractor may uti1 ize his O 4.1.1 Classification of inspection. The inspection requirements speci- fi
29、ed herein are classified as follows: a. First article inspection (see 4.1.2). b. Qual ity conformance inspection (see 4.2). 4.1.2 First article inspection. A first article sample consisting of a quantity of propellant specified in the contract or purchase order shall be delivered to the testing acti
30、vity for first article testing (see 6.2.3). methods, materials, processes, and procedures as used in production. Any production prior to acce tance of the first article sample is at the risk of the contractor. The irst article sample shall be taken from the first production lot and the sample shall
31、be submitted in accordance with 3.4. Identification sha 1 be in accordnace with MIL-STD-1168. The first article sample shall be manufactured using the same 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-! MIL-P-85662 13 Si 7779706 0365681 5 = _- -
32、 L4.1,2,1 -Examination_and test. The tests listed ln *Table shall be per- formed on the first article sample In accordance with the test methods prescribed :fin 4,3. Except as otherwise specified, tests shall be con- duGted .with samples at 20 +3“C. and test of the sample as specified in Table I. Sa
33、mple formation shall be as specified in 4.2,2. Approval will be based upon examination Table I. First article inspection. I Sample size Examination or testL/ I Temperature21 Chemical and physical?/, 11 Air space?/ Muzzle velocity!i/ Pres s u r 51 Action tim then equal portions sufficient to make the
34、 required quan- tity of a composite sample shall be taken from each representati-ve sample and blended. The composite sample shall be placed in containers, imme- diately closed with a hermetic seal, and identified respectively as a com- posite sample. These containers shall be further identified by
35、the container numbers from which the composite sample was taken, the lot number, the propellant nomenclature, and the packing date. posite sample and the representative sample shall be used to perform the tests specified in Tables I and II. propellant lot in accordance with the test methods prescrib
36、ed in 4.3. Unless otherwise indicated, tests shall be conducted with samples at 20 k3OC. Sample size and acceptance criteria for each test shall be as specified. in the tests. contract or purchase order (see 6.2.2), testing shall be conducted in accordance with a test procedure prepared by the contr
37、actor and approved by the cognizant Government design activity. Both the com- 4.2.3 Test. The tests listed in Table II shall be performed on each Only propellant sampled in accordance with 4.2.2 shall be used The combining of tests is permitted. When specified in the 7. Provided by IHSNot for Resale
38、No reproduction or networking permitted without license from IHS-,-,-_ MIL-P-85bb2 13 777970b 0365683 7 = MIL-P-85662 (AS) -.-. .-_ Table II. Qual ity conformance inspection. Examination or testL/ Chemical and Air space.!/ Muzzle veloc P res s u res/ physical.?/ 3 ty- 5/ Action time?/ Special action
39、 timeil F1 ame temperatureci Sample size Tempe rat u r e2/ -54C o 50 50 50 20 t21“C 20 50 50 50 . +7loC . 50 50 50 . Require- men t paragraph 3.1 3.1.1 3.2.1 3.2.2 3.2.3 3.2.4 3.3 Test pa rag rap h 4.3.1 4.3.3 4.3.2 4.3.2 4.3.2 4.3.2.3 4.3.4 Failure of the propellant to comply with the requirements
40、shall be cause for rejection of the lot subject to testfng of a second sample for the characteristic(s) in which failure occurred. Failure of the second sample to comply with the requirements for the characteristic( s) under test shall be cause for rejection of the lot. 2 Tolerance on ammunition con
41、ditioning temperature shall be +3“C except when otherwise indicated. l/ Sample size shall be as specified in MIL-STD-286. 5 Test performed on composite sample (see 4.2.2). 5 Test performed in a 10-round group from each of the five representative samples. Pressure, velocity, and action time tests may
42、 be performed on the same sample. 5 Calculation performed on composite sample (see 4.2.2). 4.2.3.1 Unlisted firing defects. The lot shall be suspended and referred to the contracting officer for disposition if a malfunction or casualty not covered by this specification occuring in any firing test in
43、dicates that the product is unsuited for the purpose intended. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-56b2 13 339930b 0365684 O = 4.2.3.1.1 Disposition of rejected lot. Unless otherwise specified in the contract or purchase order (se
44、e 6.2.1), first article samples and pro- duction lots which do not meet the inspection and test requirements speci- fied herein shall be disposed of. 4.2.3.2 Packing and marking inspection. Inspection of packing and marking to determine compliance with the requirements of 5.1 shall be as prescribed
45、by the contracting 4.2.4 Inspection equipment. order (see 6.2.2), the inspect ct i vi ty . When specified in the contract or purchase on equipment provisions of MIL-A-2550 shall apply 4.3 Methods of inspection. 4.3.1 Chemical composition and physical properties. The applicable tests shall be perform
46、ed in accordance with the procedures set forth in MIL-STD-286. 4.3.2 Internal ballistics performance. Ballistic tests shall be per- formed in accordance with AS12013566 as applicable, except the approved single-shot GAU-12/U barrel and test fixture shall be used. Projectiles that simulate the PGU-2O
47、/U projectile may be used. 4.3.2.1 Loading of test cartridges. The propellant samples selected in accordance with 4.2.2 shall be used to load test cartridges with the charge weight established to obtain the required ballistics. The variation in established charged weight between each group of repres
48、entative samples shall not exceed 2.0 grams. The test cartridges shall be loaded by a method capable of maintaining propellant charge weight uniformity or kO.1 gram for the selected charge weight. 4.3.2.2 Velocity correction factor. A correction factor of 0.40 m/s per meter shall be added to the rec
49、orded velocity at the measured range to obtain muzzle velocity. 4.3.2.3 Loading for special action time. The composite sample shall be used to perform the special action time test at a charge weight 3 grams below the established charge weight for the composite sample. 4.3.3 Air space. The specified propellant charge shall be poured into a primed cartridge case in accordance with MIL-STD-286, Method 508.1.2. Insert
