1、MIL-P-5bbL I3 777770b 0365b62 I m -37-0s- MIL-P-85661(AS) 22 July 1985 MILITARY SPECIFICATION PROPELLANT EXTRUDED, 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 Depart
2、ments 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-LO/U Armor Piercing Incendiary (API). 2. APPLICABLE DOCUMENTS. 2.1 Government documents. 2.1.1 Specifications
3、 and 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. SPECIFI
4、CATIONS Mi 1 i tar y MIL-N-244 MIL-A-2550 Nitrocellulose. Ammunition, General Specification for. Beneficial comments (recommendations, additions, deletions) and any pertinent 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 WCUMENT CONTAINS / distribution is unlimited.“ Provided by IHSNo
6、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-S661 13 = 7777706 0365663 3 I MIL-STD-1168 Lot Numbering of Ammunition. MIL-P-85661 (AS) I I DRAWINGS U.S. Army Armament Research and Development Command (Code Ident 19200) STANDARDS Mi 1 i tary MIL-STD- 105 MIL-S
7、TD-109 MIL-STD-286 Sampling Procedures and Tables for Inspection by Attributes. Quality Assurance Terms and Definitions. Propellant, Solid; Sampling, Exami- nation and Testing. 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publi
8、cations form a part of this specification to the extent specified herein. 20-4-77 76-4-46 76-4-56 7549033 8858577 Packing and Marking of Box, Packing, for Smokeless Powders. Box, Packing, Metal Liner (Copper), M24, for Smokeless Powders. Box, Packing, Metal-Wood, M17 for Smokeless Powders. Container
9、, Metal, Universal, M25 for Propellant and Explosives, Assembly and details. Marking Diagram and Sealing Container, Metal, Universal, M25 for Shipping of Propellant. Marking Diagram and Sealing of Metal Lined Wooden Packing Boxes for Ship- ment of Propellant. Container, Packing PA 54, Wood with Meta
10、l Liner (Modified M24 Box for Smokeless Powder). 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-856bL 13 W 99799Ob 03b5bb4 5 W Naval Air Systems Command (Code Ident 30003) 1397AS163 139 7 AS1 9 O PUBLICATIONS Fighting Vehicle Systems AS12013
11、566 MIL-P-8 56 6 1 (AS) Code of Federal Regulations (CFR) 49 CFR 170-179-397 Propellant, 25 mm, API Ammunition. Cartridge, 25 mm, API, PGU-20/U. 25-Millimeter Ammunition Ballistic Test Methods. Hazardous Materials Regulations, Department of Transportation. (Application for copies of Code of Federal
12、Regulations should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D.C. 20402.) DoD Manual 4145.26M Safety Manual. (Copies of specifications, standards, handbooks, drawings, and publica- tions required by manufacturers in connection with specific acquisition
13、functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.1.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3 REQUIREMENTS 3.
14、1 Chemical and physical properties. The chemical and physical proper- ties of the propellant shall be as specified in Drawing 1397AS163. 3.1.1 Form. Unless otherwise specified in the contract or purchase order (see 6.2.1), the propellant shall be in extruded form as specified in Drawing 1397AS163. 3
15、.1.2 Flash suppressant grain. An amount of flash suppressant grains shall be uniformly blended with the propellant grain in Drawing 1397AS163 to produce a total potassium nitrate content of 1.0 (nominal) weight per- cent in the final propellant blend. 3 Provided by IHSNot for ResaleNo reproduction o
16、r networking permitted without license from IHS-,-,-MIL-P-5661 13 = 7977706 0365bb5 7 W 3.1.3 Nitrocellulose. Unless otherwise specified in the contract or purchase order (see 6.2.1), nitrocellulose recovered from the rework of propellants or new nitrocellulose with the nitrogen content not fully me
17、eting the requirements of MIL-N-244 may be used in lieu of, or in com- bination with, complying nitrocellulose. Propellant so manufactured shall comply with all chemical, physical, and ballistic requirements. -I_ 3.1.4 Air space. The propellant charge weight that is required to achieve the ballistic
18、 requirements of 3.2 and that conforms to the requirements of Drawing 1397AS190 shall result in an air space in the primed cartridge case, which shall permit the insertion of the API projectile into the charged case without any vibration or tamping to cause compaction of the propellant charge. 3.2 I
19、nternal ballistic performance. The propellants internal bal- listic performance shall be as specified herein when loaded into repre- sentative API cartridges conforming to Drawing 1397AS190 and fired in the approved specified GAU-l2/U single-shot barrel and test fixture. 3.2.1 Muzzle velocity. The a
20、verage 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 13 m/s. to 71C, the projectile muzzle velocity shall be greater than 950 meters per second. The sample standard deviation At
21、 any cartridge temperature from -54 3.2.2 Pressure. The average chamber pressure of the sample car- tridges, conditioned at 18 to 24OC plus three standard deviations of chamber pressure, shall not be greater than 425 megapaseals (MPa). The average chamber pressure of the sample cartridges, when func
22、tioning at any individual temperature from -54 to +7loC 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 equivalent. 3.2.3 Action time. The action time of the sample cartridges shall b
23、e not greater than 6.0 milliseconds (ms) at any cartridge temperature from -54 to 71OC. 3.2.4 Special action time. The action time requirement of 3.2.3 shall also be achieved with the propellant in the “powder-to-bullet“ orienta- tion with the ammunition conditioned at -54C. A charge weight 3 grams
24、below the established charge weight shall be used. 3.3 Flame temperature. The propellant shall have an isochoric flame temperature of not greater than 2,800 degrees Kelvin (OK) as determined by the Hirschfelder method of calculation. 4 Provided by IHSNot for ResaleNo reproduction or networking permi
25、tted without license from IHS-,-,-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 guidelines applicable to the production and use of the propellant shall be complied with to preculd
26、e personal injury and damage to equipment and facilities. 3.6 Manufacturing process. When specified in the contract or purchase order (see 6.2.2), the propellant shall be manufactured by a process approved by the contracting officer, and no deviations from that process shall be made without his or h
27、er prior approval. 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. Unless otherwise specified in the contract or purchas
28、e order (see 6.Xl), the contractor shall be respon- sible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the contractor may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right
29、to perform any of the inspections set forth in this specification where such inspections are deemed necessary to asure that supplies and services conform to prescribed requirements. O 4.1.1 Classification of inspection. The inspection requirements speci- fied herein are classified as follows: a. Fir
30、st article inspection (see 4.1.2). b. Quality 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 activity for first article teting (see 6.2.3).
31、The first article sample shall be manufactured using the same methods, materials, processes, and procedures as used in production. Any production prior to acceptance of the first article sample is at the risk of the contractor. first production lot and the sample shall be submitted in accordance wit
32、h 3.4. Identification shall be in accordance with MIL-STD-1168. The first article sample shall be taken from the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-856bL 13 9779706 0365667 O MIL-P-85661 (AS) 4.1.2.1 Examination and test. When sp
33、ecified in the contract or purchase order (see 6.2.2), the contractor shall prepare a test plan for the inspections specified herein. The tests listed in Table I shall be performed on the first article sample in accordance with the test methods prescribed in 4.3. ducted with samples at 20 +3“C. and
34、test of the sample as specified in Table I. be as specified in 4.2.2. a test procedure prepared by the contractor and approved by the cognizant Government design activity. Except as otherwise specified, tests shall be con- Approval will be based upon examination Testing shall be conducted in accorda
35、nce with Sample formation shall Table I. First article inspection. 11 Examination or test- Chemical and physical- 31, 51 41 Air space- Muzzle velocity- 51 51 Pressure- Act ion time- 41 Special action time- Flame temperature- 51 61 Sample size .Temp era t ure- 21 -54C . 50 50 50 20 +2i0c 20 50 50 50
36、. +71“C -. . 50 50 50 . - Require- ment paragraph 3.1 3.1.4 3.2.1 3.2.2 3.2.3 3.2.4 3.3 Test paragraph 4.3.1 4.3.3 4.3.2 4.3.2 4.3.2 4.3.3 4.3.4 - Lif any individual sample fails to meet the applicable requirements, -Tolerance on ammunition conditioning temperature shall be +3“C except :Sample size
37、shall be as specified in MIL-STD-286. 5Test performed on composite sample (see 4.2.2). ?Test performed in a 10-round group from each of the five representa- tive samples. Pressure, velocity and action time tests may be per- formed on the same sample. the first article shall be rejected. when otherwi
38、se indicated. 5Calculations performed on composite sample (see 4.2.2) . 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-85661 13 W 9999906 0365668 2 m 4.1.2.2 First article sample rejection. Failure of the sample to comply with requirements o
39、f this specification shall result in sample rejection. Determination as to acceptability of any first article sample shall be based upon results of initial tests only and no second tests shall be per- mitted on that first article. order (see 6.2.2), testing shall be conducted in accordance with a te
40、st procedure prepared by the contractor and approved by the cognizant Government design activity. O When specified in the contract or purchase 4.2 Quality conformance inspection. 4.2.1 Inspection sample. The inspection sampling procedures shall be in accordance with ML-STD-105. ance with MIL-STD-109
41、. Quality assurance terms shall be in accord- 4.2.1.1 Propellant lot. A propellant lot shall consist of a uniform blend of propellant manufactured by one manufacturer, in one unchanged process, in accordance with the same drawings and drawing revisions, and the same specification and specification r
42、evision. 4.2.1.2 Lot identification. Each packed propellant lot shall be iden- - tified in accordance with applicable drawings and MIL-STD-1168, supple- mented as directed by the contracting activity. 4.2.2 Sampling. Random representative samples shall be taken by random selection of one container f
43、rom each identifiable increment of the lot. A random sample of five containers shall be selected from these represen- tative samples. From each container selected, a sample shall be taken such that the aggregate quantity shall be sufficient for the required tests. These samples shall be poured into
44、clean containers, immediately closed with a hermetic seal, and identified as representative samples with a label showing the container number from which the sample was taken, the lot number, the propellant nomenclature, and the packing date. Prior to con- ducting lot acceptance tests, these samples
45、shall be permitted to attain room temperature; then equal portions sufficient to make the required quan- tity of a composite.sample shall be taken from each representative sample and blended. The composite sample shall be placed in containers, imme- diately closed with a hermetic seal, and identifie
46、d respectively as com- posite sample. These containers shall be further identified by the container numbers from which the composite sample was taken, the lot number, the propellant nomenclature, and the packing date. Both the com- posite sample and the representative sample shall be used to perform
47、 the tests specified in Tables I and II. - 4.2.3 Test. The tests listed in Table II shall be performed on each - propellant lot in accordance with the methods of inspection prescribed in 4.3. Unless otherwise indicated, tests shall be conducted with samples at 7 Provided by IHSNot for ResaleNo repro
48、duction or networking permitted without license from IHS-,-,-MIL-P-856bL 13 m 9799906 0365669 q =I MIL-P-85661 CAS) 20 53C. specified. Only propellant sampled in accordance with 4.2.2 shall be used in the tests. The combining of tests is permitted. When specified in the contract r purchase order (se
49、e 6.2.2), testing shall be conducted by the contractor and approved by the cognizant Government design activity (see 6.2.2). Sample size and acceptance criteria for each test shall be as Table II. Oualitv conformance insDection. il Examination or test- Chemical and physical- 31, 41 Air space- Muzzle velocity- 51 51 Pres sur e- Action time- 41 Special action time- 61 Flame temperature- 41 51 Sample size - 21 Temperature-
