1、P NIL-P-70505 23 W 997770b 0355425 3 45-3 7-0s- MIL-P-70505 (AR) 28 December 1984 MILITARY SPECIFICATION PROJECTILE 155MM: XM864 PROPELLANT GRAIN This specificaton is approved for use by the U.S. Army Armament Research and Development Center, and is available for use by all Departments and Agencies
2、of the Department of Defense. 1. COPE 1.1 Scope. Tais specification covers requirements, quality assurance provisions and preparation for delivery criteria for propel-lant grain used in XM864 155MM Projectiles (see 6.1). * ,- .- 2; APPLICABLE DOCUNENTS 2.:1 Government documents. 2:.1 Specifications
3、and standards. Unless otherwise specisied (see 6.2), the following specifications and standards of theiqsue listed in that issue of the Department of Defense Index of Sp-ecif ications and Standards (DODISS) specified in the sollcitation, form a part of this specification to the extent specified here
4、in. SPEC IF1 CAT I ONS MILITARY MIL-A-48078 Ammunition, Standard Quality Assurance Provisions, General Specification for THIS DOCUfilEEJT CONTAINS /y - PAGES. -, FSC 1320 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document
5、 should be addressed to: Commander, US Arm Armament Research and Development Center, Attn. DRSMC-QA, Dover, New Zrsey O7801 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I 1 Provided by IHSNot for ResaleNo
6、 reproduction or networking permitted without license from IHS-,-,-MIL-P-70505 13 E 777770b 03551.126 5 MIL-P-70505 (AR) STANDARDS MIE ITARY MIL-STD-286 Propellants, Solid Sampling, MIL-STD-410 Non-des tructi ve Testing Personnel . Examination and Testing Qualification and Certification 2.1.2 Other
7、Government documents, drawings and publications. The following other Government documents, drawings and publications form a part of this specification to the extent specif ied herein. DRAWINGS US ARMY ARMAMENT RESEARCH AND DEVELOPMENT CEJSJTER 9381 125 Propellant Grain (Copies of specifications, sta
8、ndards, handbooks I drawings and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer .) of this specification to the extent specified herein. 2.2 Other publications. The fo
9、llowing documents form a part CHEMICAL PROPULS ION INFORMATION AGENCY CPIA Publica- JANNAF Solid Propellant tion,No. 21 Mechanical Behavior Manual (Section 4.3.2, Uniaxial Tensile Test of Constant Strain Rate; Section 4.7.5 Propellant Liner Peel Test, Nov. 70) (Copies of the above documents required
10、 by contractors in connection with specific acquisiton functions should be obtained from the contracting activity or as directed by the contracting officer . ) the text of this specification and the references cited herein, the text of this specification shall take precedence. 2.3 Order of precedenc
11、e. In the event of a conflict between . 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70505 (AR) 3. REQUIREMENTS 3.1 General. Material, parts and assemblies shall comply with Che requirements specified on the applicable drawings and referen
12、ced specifications. Materials shall be checked for shelf life in accordance with individual material specifications and government approved process controls (see 3.2) . 3.2 Process controls. The propellant grain and inhibitor shall be fabricated in accordance with approved process controls. Followin
13、g initial approval, any change in the approved process controls shall require prior Government approval (see 6.4) . propellant shall be 930+35 calories per gram. strand burning rate will be 0.175 + .O09 inches per second at 500 psig and 0.210 - + .OP0 inches per second at 1000 psig. the inhibitor/pr
14、opellant bond at 7O0+s0F - shall be 8 pounds per/linear inch (p.1.i .) . 3.3 Heat of reaction. The heat of reaction of each batch of 3.4 Strand burning rate. When tested at 70 + 5OF the - 3.5 Inhibitor peel strength. The minimum peel strength of 3.6 Physical defects. O 3.6.1 Inhibitor separation. On
15、 finished propellant segments there shall be no visual evidence of inhibitor/propellant separation (delamination) within one inch of the edge of any inhibitor/propellant mating surface. no visual evidence of bubbles or separations in the inhibitor/ propellant bond that are, individually, greater tha
16、n .O1 square inch in area or collectively greater than .O2 square inch in total combined area. In addition there shall be 3.6.2 Cast inhibitor defects. There shall be no visual , evidence of perforation on the cast inhibitor. 3.6.3 Internal defects. The propellant segment shall contain no cracks, vo
17、ids, or fissures measuring more than 0.030 inch in any direction. The total combined length of all cracks, voids, or fissures shall not exceed 0.060 inch and the combined length of all foreign material (maximum dimension each particles) shall not exceed 0.040 inch. 3.7 Mechanical properties . The cu
18、red propellant shall have the following properties at 70 - + 5OF: a. Modulus of elasticity 1075 + 375 psi. b. Maximum stress of 170 psi mTnimum per sample average. c. Strain at maximum stress 30% minimum per sample average d. Ultimate strain 30% minimum 8 O c Y I- U ai v, W 8 Provided by IHSNot for
19、ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70505 13 m 7777706 0355933 2 m *I+ k I u a c: m bi c .rl x .rl E k al 4J YI Id ci c m d rl n z pi * a E ar4 W al a a E YI al a . k , with the beam parallel with the longitudinal axis; second, with the beam directed raia
20、lly from the perpendicular to the central. longitudinal axis of the grain when assembled. A penetrometer or sample test block showing the types of defects for rejection shall be designed by the contractor to assure a two percent minimum sensitivity and approved by the acquiring activity (see 6.5). F
21、inished propellant grain assemblies which exhibit any of the physical defects specified in 3.6.2 shall be rejected and removed from the lot. t 4.5.6 Proving ground. The grains sampled for this test shall first be loaded into live base burner assemblies: then be live loaded projectiles; and forwarded
22、 to a designated government proving ground for firing. This test shall be conducted in accordance with an applicable proving ground test procedure. All projectiles fired for this test will. be assemialed with a M557 point etonating fuze and a Piepe self registration charge. Cannon using a M203 serie
23、s propelling charge. fuze and propelling charge shall all be at ambient temperature. constant gun QE will be maintained throughout the test. Pressure time traces will be made for each projectile fired. Smear photographs will be taken at 10 and 30 meters in front of the muzzle. Doppler radar (HAWK) w
24、ill be used. An effort will be made to fire all projectiles for this test within a one hour time span. Observation shall be made to determine compliance with 3.2. Stop the test if surface winds exceed 20 knots or If two consecutive wind speed readings differ by more than 15 knots or if the wind dire
25、ction of two consecutive readings differ by more than 800 mils (does not apply if wind speed is less than 5 knots). L forwarded to a load, assemble and pack facility for assembly onto The projectiles fired in this test shall be fired in the M199 The projectile, A 4.5.6.1 Weapon and component data. A
26、ll weapon and ammunition components used in support of this test shall be identified bv model and lot or seriai- numbers. 4.5.6.2 Data reporting. As a minimum the proving ground test report will include the following observable attribute data: a. Premature functioning b. Metal parts separation c. im
27、pact functioning (information only) d. Round by round.range. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-70505 13 = 7777706 0355440 T MIL-P-70505 (AR) 4.5.10.3 Calculation of percent WE. Percent RPE = 67.45 /- X Where: x = Average range of
28、group tested xi = Individual projectile range 4.5.10.4 Sample size. Twelve grains (assembled) will be randomly selected for this test. Ten grains (assembled) are to be fired and counted. The remaining two grains (assembled) are available for use of the proving ground should any of projectiles fired
29、be considered inva%d due to test conditions. (Note: The required RPE assumes a ten round sample.) 5, PACKING 5. P Packaging, packing and marking. Packaging, packing and marking of grains shall be in accordance with either 9386975 (level B) or 9386976 (level A qualified) in accordance with the contra
30、ct. (This section is not applicable if Base Burner LAP operations are to be performed at the same facility). 6. NOTES 6.1 Intended use. The item covered by this specification is intended for use in Base-Burner Assemblies for XM864 155MM Projectiles. 6.2 Ordering data. 6.2.1 Acquisition requirements.
31、 Acquisition documents should specify the following: a. Title, number and date of this specification b. First article inspection, when required (see 3.8). 6,2.2 Contract data requirements Contractor engineering documentation specified below will be delivered as identified on a numbered DD Form 1664
32、when specified on a DD Form 1423 incorporated into the contract. Paragraph Data Requirement Applicable DID Process control DI-P-1604 3.2 4.4.4 Inspection equipment DI -R-10054 approval 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. -. . MIL-P-7
33、0505 13 W 7777906 0355YY1 1 W MIL-P-70505 (AR) (Copies of DIDS required by contractors in connection with specific acquisition functions should be obtained from the Naval Publications and Forms Center or as directed by the contracting officer .) a 6.3 Objective evidence. 6.3.1 General. Inspection re
34、cords and documentation verifying 6.3.2 Materials. A statement (certification), supported by compliance with applicable drawing and specification requirements. test data, that materials produced or purchased by the contractor meets all requirements when such material is controlled by Government or c
35、ommercial specifications referenced in contractual documents. fje4 Process controls. Procesa controls and process control changes should be submitted for approval to Comandero US Army Armament Research and Development Center I ATTM: CMCAR-LCU-SI, Dover, NJ 07801-5001. Process controls shall specify
36、in detail all materials, procedures, techniques and equipment (including handling of ingredients, mix cycle, sequences of addition of materials, mixing times and conditions, cure temperatures and times etc.) required to procesa, fabricate, inspect and test a quality product suitable for its intended
37、 use as determined by the acquiring agency. Detailed test and inspection record format shall be included as an integral part of the process and shall be in sufficient detail as to enable easy verification by the Government QAR designated by the acquiring agency. required, to Commander , US Army AMCCOM, ATTN: AMSMC-QAR-I(D) , Dover, NJ 07801-5001. a 6-5 Equipment design approval. Submit equipment designs, as Custodian Amy-AR Preparing Activity (Project 1320-A817) Army-AR 17 f) _- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
