1、MILITARY SPECIFICATION CARTRIDGE, 81, HE, M374A3 LOADING, ASSEMBLING AND PACKING This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers the loading, assembling and packing for one type of high explosive mortar cartr
2、idge desLgnated as Cartridge, 81, HE, M374A3. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposals form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL- A- 2 5 5 O MIL-C-00401 STAND
3、ARDS MILITARY MIL- STD- 105 MIL-STD-109 MIL-STD-453 MIL-STD-3168 MI L-S TD- 12 3 5 -Ammunition and Special Weapons, General Specification for -Composition B, Military Specification for -Sampling.Procedures and Tables for Inspection by Attributes (-ABCr.STD- -Quality Assurance Terms and Defini -Inspe
4、ction, Radiographic -Lot .Numbering of Ammunition -Single and Multilevel Continuous Sampling Procedures and Tables for Inspection by Attributes PRODUCT AND PACKING DRAWINGS ARMY 9241291 -Cartridge, 81MM, HE, N374A3 W/Fuze, PD, M524A6 ,105 . tions 9230175 9278234 -Box, Wirebound, Packing, Ammo for 81
5、MM Mortar 9287601 -Container, Ammo, Fiber, M252A4, For 81MM -Packing however, the use of a densitometer is recommended. 4.3.1.2 Check of photographic density of film.-The photo- 4.3.2 The cartridges shall be fired from a standard 8im mortar One half of the sample Proving ground test.-The test shall
6、be performed at a Government Proving Ground in accordance with the applicable USATECOM Acceptance Test Procedure. at an elevation of forty-five degrees, cartridges shall be fired at charge one and the other half at charge nine. All fuzes shall be set for superquick functioning. The individual veloci
7、ties, pressures and ranges shall be recorded .on the firing record, Observation shall be made for misfires and duds, and shall be recorded. In the event of a misfire, the ignition cartridge shall be removed and forwarded to Picatinny Arsenal. Misfired ignition cartridges shall not be disassembled by
8、 the proving ground. Should a premature burst or metal parts separation occur, a photograph shall be taken of the evidence and attached to the firing record, The velocity and range standard deviations and arithmetic averages shall be calculated and recorded. Range probable error shall be calculated
9、and recorded. Temperature of the day, weather and the time of firing shall also be recorded. Hawk radar shall be used to observe for metal parts separa- tion, unobserved short rounds and unobserved duds. In these events, an analysis should be made of the radar data and should be noted on the firing
10、record. This shall include a comparison of times of flight of the unobserved rounds with that of the normal rounds. Prints of the radar traces of those rounds, and prints of the preceeding and succeeding rounds, shall be attached to the firing record. Data from ballistically acceptable lots may be d
11、iscarded. Smear camera shall be used to photograph all samples, The camera shall be positioned to pick up each round just outside the second velocity coil. Should an umbserved dud, short round or any other abnormal performance occur, a photo print of these rounds, and prints of all the other rounds
12、in-that particular charge zone, shall be attached to the firing record. Film from acceptable lots may be discarded. 11 .= .* Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48171 13 777790b 031b745 T 4.3.2.1 Test validity.-If for any reason the
13、 proving ground or Picatinny Arsenal considers that the test conditions have detrimentally affected the test results, the test results shall be declared invalid and a new test shall be performed on additional sample cartridges. 4.3.3 Strength of heat weld.-The sample shall be tested for integrity by
14、 applying the required load at the heat weld radially and in a direction away from the axis (center) of the ring. 5. PREPARATION FOR DELIVERY 5.1 Level of packaging and packing.-Packaging and packing shall conform to Level A, as established in DOD Instructions 4100.14 Wnform Preservation - Packaging
15、, Packing and Marking of Items of Supplyt1. 5*2 Packaging, packing and marking.-Packaging, packing and marking shall be in accol-dance with dwg. 9230175 and dwg. 928 7 601. 6. NOTES 6.1 Ordering data.-Procurement documents shall specify the a, Title, number and date of this specification. bo Data ca
16、rds.-Data cards shall be prepared for each following: lot in accordance with the information specified in Standard 6.2 Inspection equipment designs.-Inspection equipment MIL-STD-1167. designs are of two types-Government Special Inspection Equipment (SIE) designs and Contractor Designs. SIE designs a
17、re designated by drawing numbers (on the Equipment Lists referenced on the Equip- ment Tabulation) or (under the “Method of Inspection1 headings in Section 4) is assigned to the Contractor, the Contractor is designated llCD1l. The Contractor need not furnish any design when a complete Government SIE
18、 design is provided. Unless otherwise specified, however, the Contractor may submit alternate or modified Contractor designs of SIE in accordance with 6,2.2 and 6.2.3, should he elect to do so. 6.2.1 following: Design responsibility for all other inspection equipment Equipment to be designed by SIE
19、designs.-SIE designs may consist of any of the a. Detailed drawings which completely depict all information necessary for the fabrication and use of the item of inspection equipment. 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-b. A source cont
20、rol drawing or a specification control drawing as defined in MIL-STD-100. c. An envelope drawing, as defined in MIL-STD-100, which establishes the criteria which a detail design shall meet. When envelope drawings are specified, the Contractor shall prepare designs which comply with the criteria ther
21、ein. 6.2.2 for all inspection equipment for which and may include commercial equipment which the Contractor proposes to use. which is cataloged and available for purchase by the general public). Contractor designs shall include appropriate operating .instructions, calibration procedures and maintena
22、nce procedures. Commercial equipment shall be fully described by catalog listings or other means which provide sufficient information to permit identification and evaluation by the Government and may include illustrations and engineering data. Designs shall be prepared for any special fixture(s) req
23、uired to be used with commercial equipment, or with SIE designs, if not otherwise covered thereby (See 6.2.1). Designs shall be of the category and form (per MIL-D-1000) specified in the Contract Data Requirements Lists (DD Form 1423). The Contractor is referred to MIL-HDBK-204, Equipment Design“ fo
24、r guidance. The specification number and the applicable five-digit defect code number (or other specific identifying information) from Section 4 of this specification shall be referenced on each Contractor design, together with the component or assembly drawing number and revision letter to which th
25、e specific design applies. shall be approved by the Government prior to fabricating or procuring the equipment. Designs shall be submitted for approval in accordance with the stipulations, time frame and distribution specified in the Contract Data Requirements List (DD Form 1423) or in the contract.
26、 Partial submission of inspection equipment designs is permissible and encouraged. However, the completion data for design review will be based on the date of the final submission of designs. Picatinny Arsenal design review will normally be accomplished within one month after receipt. ballistic acce
27、ptance test data (i.e.a firing record) will b forwarded to the following: Contractor designs.-Contractor designs are required (Commercial equipment is defined as unmodified equipment SIE designs are not specified, 6.2.3 Submission of designs for approval.-Contractor designs 6.3 Submission of test da
28、ta.-ne copy of proving ground Comaner Picatinny Arsenal Dover, New Jersey 07801 ATTN: SARPA-&A-A-A, SARPA-AD-E-A4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FEL-C-48171 (PA) 6.4 Clean scrap.-Clean scrap is defined as scrap formed in kettles, pai
29、ls, risers and loading machines used in the pouring and cooling operations, and scrap fomd during the drillhg operation. Scrap from floor sweepings, ventilations, and suction apparatus (other than that of drilling operations) is not defined as being clean scrap and shall not be used. 6.5 Lioaing of
30、hi& explosive.-Solid explosive shall not be added to the melted explosive or the the projectile body during pouring or cooling. 6.6 ProvSng ppund test summy. SAMPIE SIZE Ballistic (see 4.2.3.4) Eighty samples until three consecutive lots have complied with the acceptance criteria. Forty-eimt samples
31、 thereafter. custodian: ARMY-PA a. Misfires (see 3.5.1) b. Duds (see 3.5.2) c. Short rounds (see 3.5.3) d. Premature Burst (see 3.5.4) e. Metal Parts Separation f. Range Standard Deviation (see 3.5.5) (see 3.5.6) Preparing Activity: ARMY-PA Project Number: 1315-A-O24 . 14 *. Provided by IHSNot for R
32、esaleNo reproduction or networking permitted without license from IHS-,-,-,140 iL U 2: a120 X o ij ,110 (8ASED ON SPECIFIC GRAVITY OF STEELz7.8 SPECIFIC. GRAVITY OF CHARGE = LGO) WHERE TEEQUIV, STEEL THKNS, (IN,) TwSINGLE WALL CHXNS, (tNJ Tc =CHARGE THKNS,( IN,) P z 0.02 Tc J I flSTRUCTIOh!S!- I- - -5 - - I CONNECT TVJ AND. Tc SCALES WITH STRAIGHT LINE AND READ PENETRA- METER SIZE ON P SCALE, - 4 3 -2 e+=- d / ,025 I PENETRAMETER THICKNESS-FGR RADIOGRAPHY OF LOADED STEEL SHELL Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
