1、MILITARY SPECIFICATION FROPELEANT, M1 POR USE IN 105“ CARTRIDGE , HEP-T, M39 3A2, W-T, M416, AND TP-T, M467 This specification is approved for use by Picatinny Arsenal, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE - 1.1 This
2、specification covers Ml Propellant for use in - 1.2 Classification, The propellant shall be Type I, Cartridge, 105MM, HEP-T, M393A2, W-T, M416 and TP-T, M467. cylindrical multiple perforated grains. 2. APPLICABLE DOCUMENTS - 2.1 Issues of documents. The following documents Of the issue in eftect on
3、date 02 invitation for bids, or request for proposal, form a part of this specification to the extent specified herein, SPECIFICATIONS MIL-A-48078 - Ammunition, Standard Quality Assurance Provisions, General Specification for STANDARDS MILITARY MIL-STD-652 - Propellants, Solid, for Cannons, Requirem
4、ents and Packing DRAWINGS ARMY “_ . “ 8886470 - Cartridge, 105 HEP-T, M393A2 FSC: 1376 Beneficial comments (recommenaations, additions, deletonsj and any pertinent data which may be of use in improving this dociment shauid be addressed to: Commander, US Army Armament Research and Develop- ment Comua
5、nd, Attn. DRDAR-QA, Dover, New Jersey 07801 by using the - self-addl-essed Standardizaion Document Improvement Proposal (DD Fom 1426) appearing at the end of this document or by letter. Licensed by Information Handling Services(Copies of specifications, standards, drawings and publica- tions require
6、d by contractors in connection with specific ; rocurement functions should be obtained from the procuring activity or as directed by the contracting officer.) part of this specitmation to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or r
7、equest for proposal shall apply. 2.2 Other publications. The following documents form a CODE OF FEDERAL REGULATIONS Title 49, Transportation, Parts 100-199 (Anplication for copies should be addressed to the Super- :-.tendent of Documents, Government Printing Office, Washington, D.C. 20402. Orders fo
8、r the above publication should cite: 49 L 3 100-199 (latest revision) ) . AMC PAMPHLET 706-114 Experimental Statistics, Section 5, Tables (Application for copies should be addressed to the Publications and Reproduction Agency, Letterkenny Army Depot, Chambersburg , Pa. 17201). 3 . REQUIREMENTS 3.1 M
9、aterials. The propellant shall be Ml, conforming to the requirements of MIL-STD-652 except that it shall con- tain 1 percent +0.30 percent potassium sulfate. fired in the M68 Gun and with the weight of projectile (M393A2, 25.00 lbs.) for which it was manufactured, shall comlv with the following requ
10、irements when tested as 3.2 Proving ground assessments. The propellant when specikied in 4 4.1. 3.2.1 Permissible individual maximum pressure. The propellant at recommended charge weight shall not produce a chamber pressure greater than 31,100 psi at any operating temnerature (-5O0F to +145OF) when
11、fired in a standard weabon (see 6 .II) . 3.2.2 Charge establishment phase. At 70 degrees Fah- renheit (OF) and standard weapon conditions, the propellant shall be capable of assessment to a velocity of 2400 feet per second (fps) (731.5 meters per second (mps) 1. The recommended propellant charge wei
12、ght for use in the M416 Proiectile (2.5.2 lbs) and the M467 Projectile (24.8 lbs) 3.2.3 Uniformity phase 3.2.3.1- Uniformity of velocity. The Standard devia- tion of velocity for the lot of 70F shall not exceed 10.0 Licensed by Information Handling Servicesfps (3.0 mps) . 3.2.3i2 Average pressure. A
13、t standard weapon conditions and recommended charge weight, the propellant shall not pro- duce an average pressure greater than 27,000 pounds per square inch (psi) at 70F. 3;3 Workmanshi The best comercial practices shall be used in-dation of propellant furnished under this specification, and. all o
14、ther applicable documents. The propellant and its standard ingredients shall be protected from the action of direct sunlight and acid fumes. Unless otherwise specified, no reground propellant or nitrocellulose shall be used in the manufacture of propellant procured under this specification, 4. QUALI
15、TY ASSURANCE PROVISIONS 4.1 Responsibility for inspection and standard quality assurance provisions. Unless otherwise specified herein or in the contract, the provisions of MIL-A-48078 shall apply and are hereby made a part of this detail specification. Inspection shall be conducted on this item, 4.
16、2 Classification of inspections. Quality Conformance 4.3 Quality conformance inspection 4.3.1 Inspection lot tonnation. inspection lots shall 4.3.2 Examination and testing 4.3.2.1 Sampling (see-.-3.1 and 3.2) . Each lot of pro- comply with the lot tormation provision of MIL-A-48078. pellant shall be
17、 sampled and tested for composition, form, dimensions and chemical/physical properties in accordance with MIL-STD-652. Each lot of propellant shall be sampled for proving ground tests in accordance with MIL-STD-652 except that ten containers shall be sampled for both initial and subsequent productio
18、n lots. 4 . 3 . 2 . 2 Permissible individual, maximum pressure. If at any time during testing, an individual pressure greater than that specified in 3.2.1 is observed, testing shall cease and the lot shall be rejected. does not meet the applicable requirement, testing shall cease and the lot shall b
19、e rejected. the product of the factor (see 6.3) times the velocity standard deviation of the rounds tested in accordance with 4.4.1.2 exceeds Che applicable requirement, apply retest criteria in accordance with 4-4.1.3, 4.3.2.3 Charge establishment (see 3.2.2) . If the lot 4.3.2.4- Velocity uniformi
20、ty (70OF) (see -3.2.3.1) . If 43.2.5 Pressure uniformity 4.3.2.5.1 Average pressure (see 3.2.3.2). If any aver- age pressure obtaned during initial or subsequent production at 70F exceeds the applicable requirement, apply retest criteria in accordance with 4.4.1.3. 3 Licensed by Information Handling
21、 Services4.3.2.5.2 Individual pressure (subsequent production). !:f an individual pressure observed during the /OOF mitor- :tY series, when corrected to standard conditions and re- abamended change weight, exceeds 31,100 psi minus the quan- tity 75 times the pressure temperature coefficient estab- l
22、ished during Initial Production Testing, and calibration round .performance is acceptable (see 4.4 1.4) , the- lot shall be tested at +145OF in accordance with 4.4.1.2.1. If any individual pressure at 145OF, when corrected to standard conditions and recommended charge weight, exceeds 31,100 psi, tes
23、ting shall cease and the lot shall be rejected (see 6.11). 4.4 4.4.1 Proving ground-assessments. These tests shall be conducted at a Government proving ground (designated by +h- contracting officer) in accordance with the applicable Proving Ground Acceptance Test Procedure. The following I tr?rances
24、 shall apply to all -5OoF, 145OF and 70F condi- tioning: -50F from -50F to -45OF; 145OF from 140F to 145OF; 70F from 67.5OF to 72.5OF. 4.4.1.1 Charge establishment 4.4.1.1.1 Charge slope method. Three or more groups J of rounds loaded with selected charge weights of propellant (weights selected shou
25、ld bracket expected service charge weight) shall be conditioned and fired at 70F. From the data obtained a charge weight shall be calculated which will yield the prescribed service velocity (see 3.2.2). This calculated charge weight shall then be loaded into rounds for the uniformity series (see 4 .
26、 4.1.2) . The difference between the corrected velocity obtained during the uniformity series and the service velocity shall be compensated for by a final adjustment in charge weight using the slope of the vel- ocity charge weight curve previously established. of a given production series have been
27、fired to provide a good knowledge of the propellant characteristics, the charge slope method of assessment may be discontinued and the charge weight determined by the constant slope method. A composite charge weight versus velocity curve can be estab- lished from test results generated. This curve c
28、an then be used as in 4.4.1.1.1 to calculate the charge weight needed to achieve service velocity. This calculated charge weight is then to be loaded into rounds for the unifomity series and final adjustment is to be made as indicated above for the charge slope method. 4.4.1.1.2 Constant slope metho
29、d. After ten (10) lots Thirty rounds shall be assembled with the established charge weight of propellant. Ten rounds each shall be conditioned to -50F, 70F and 145OF (as indicated by thermocoupled control round). Rounds fired at 70F shall be fired alternately with calibration rounds 4 Licensed by In
30、formation Handling Servicesand shall be corrected to standard weapon/firing conditions ($*e* the difference between calibration performance under test conditions and standard conditions). Firing results at all temperatures shall be Corrected to standard projectile weight (see 3.2) and to recommended
31、 charge weight conditions (i.e. the difference between as fired charge weight and re- commel.lded charge weight). The means and standard deviations of the velocities and pressures at all firing temperatures shall be calculated using corrected results. The average pressure-temperature coefficient for
32、 the lot shall be calcu- lated from the pressure data obtained at 70O and 145O. The average of the coefficients far ten lots shall be util- ized to calculate a 7OoF upper pressure control for use in subsequent production. be assembled and tested at 70F, fired alternately with cal- ibration rounds. T
33、he means and standard deviations of the velocity and pressure shaIl be calculated on results corrected to standard conditions and recommended charge weight. If any individual pressure exceeds the calculated 70F upper pressure control (see 4.3.2.5.2), ten additional test rounds shall be conditioned a
34、nd fired at 145OF. All results at 145OF shall be corrected to standard projectile weight (see 3.2) and re- commended charge weight. reason the proving ground considers that test conditions have detrimentally affected the test results, additional charges as required shall be tested. A lot shall be re
35、- tested whenever any o the following conditions exist and whenever the proving ground deems it necessary (see 6.8) . a. Test lot fails velocity standard deviation or average pressure at 70F and calibration rounds fail onor more requirements stated ln 4.4.1.4, retest for uniformity. b. Test lot fail
36、s velocity standard deviation or average pressure at 70F and any extreme test value is an outlier, retest for: uniformlty (see 6.9) . c. The final adjustment in charge weight exceeds two percent of the charge weight used in uniformity firings, retest for charge establishment in accordance with 4.4.1
37、.1.1. 4.4.1.4 Referral criteria (see Figure 1) . A test lot shall be referred to ARRADCOM, ATTN : DRDAR-QAR-R for dispo- sition whenever any of the following conditions exist and whenever the proving ground deems it necessary. to comply with Section 3 of thi-s specification. cent of the expecked muz
38、zle velocity. 4.4.1.2.2 Subsequent production. Ten (10) rounds shall 4.4.1.3 Retest criteria (see Figure 1) . If for any a. Calibration rounds fired in any test phase fail b. Calibration correction applied exceeds two per- c. Calibration components are not available. d. Number of test or calibration
39、 rounds fired is . less than specified. 5 Licensed by Information Handling Servicese. Number of test or calibration results utilized in calculations is less than specified. 5. PACKAGING . Packing and marking shall be 2, except that all propellant designated for use as reference shall be packed Level
40、 A. 6. NOTES 6.1 Ordering data. Ordering data shall be in accord- 6.1.1 Procurement requirements. Procurement require- ance with MIL-A-480 /8 (PA) with the following exceptions . mr:ts of MIL-A-48b78(PA) shall apply except for First Article Sample. 6.1.2 Contract data requirements. In addition to th
41、e normal distribution of records, when the propellant is pro- cured by the Department of the Army, one copy of all ballis- tic test data and one copy of the Propellant Description sheet shall be forwarded to: Commander, ARRADCOM, ATTN: DRDAR-QAR-R, and one copy to ATTN: DRDAR-LCU-EP, Dover, New Jers
42、ey 07801. 6.2 Standard deviation. The standard deviation shall be calculated with (n-1) as the divisor in a standard stat- istical technique equivalent to that shown in MIL-STD-414, Section B, Example B-l. AMC Pamphlet 706-114 using the 95 percent upper confidence limits (A.05) and n-1 degrees of fr
43、eedom, make allowances for the probability that a standard deviation from a smaller sample size exceeds the true standard deviation by chance alone. lots represent the kirst ten consecutive lots from each man- ufacturer which have been produced and met the acceptance criteria of this specification.
44、Throughout production, if 3 consecutive lots fail on first test or lapse in production of 90 days or more occurs, testing shall revert back to initial production plan (see 4.4.1.2.1). 6.5 Surveillance sample. Samples shall be forwarded to Commander, ARRADCOM, Dover, New Jersey, ATTN: DRDAR-LCU for t
45、he propellant surveillance test program in accordance 6.3 Factors. The factors, as taken from Table A-21 of 6.4 Initial production lots. The initial production with MIL-STD-652. accordance with drawing 8886470 - Cartridge, 105MM, HEP-T, 6.6 Test rounds. Test rounds shall be assembled in M39 3A2. 6.7
46、 Proving ground test summary 6 Licensed by Information Handling ServicesTemp (OF) - 50 70 14 5 70 14 S* - Initial Production Sample Assessed Lot Std Size Velocity Dev of Vel (fps) (mps) (fps) bps) 10 NA NA NA NA 10 2400 731.5 10.0 3.0 10 NA NA NA NA Subsequent Production 10 2400 731.5 10.0 3.0 10 NA
47、 NA NA NA MIL-P-46252C (PA) Perm Ind Avg Pres Max Pres Max (psi) (psi) 31,100 NA 31,100 27,000 31,100 NA see 4.3.2.5.2 27,000 31,100 NA *To be fired only when 70F results indicate that marginal pressure performance may exist (see 4.3.2.5.2) . 6.8 Retest. All original and retest data shall be submitt
48、ed to ARRADCOM, ATTN: DRDAR-QAR-R, Dover, New Jersey 07801. 6.9 Outlier. The following test shall be performed to determine if a single test result is an outlier. With a sample size of 10 at a significance level of 0.05, the critical value (Tc) is 0.477. Calculate a test value (Tt) as follows 2 For
49、Low Outlier For High Outlier Where : X1 = test result being tested as low outlier X2 = test result adjacent to XI, after all the test Xg = test result adjacent to the largest test result X10 = test result being tested as high outlier results are ordered from smallest to largest X1 or X10 is an outlier if Tt is greater than Tc. 6.10 Test anomalies. Any unusual occurrences during ballistie testing, such as excessive delays between rounds, stickers, poor projectile flights, etc., shall be reported in detail on the applicable firing
