1、1 _. e- 4 MIL-C-LOD LO m 7777706 0273303 3 m s -37.- 03 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US Army Armament, Munitions and Chemical Command, ATTN: SMCAR-CCB-SAS, Watervli
2、et, NY 12189-4050 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the , end of this document or by letter. - MIL-C-l0888D( AR) 7 OCTOBER 1986 SUPERSEDING 20 June 1972 MIL-C-l0888C( WC) MILITARY SPECIFICATION CANNON, 4.2 INCH MORTAR: M30 AND MOUNT
3、, 4.2 INCH MORTAR: M24A1 This specification is approved for use within the US Army Armament, Munitions and Chemical Command, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification supports the acquisition of the
4、4.2 inch M30 mortar cannon and the 4.2 inch M24A1 mortar ground mount. 1.2 This specification includes the minimum essential Engineering and Packaging Requirements and the necessary Product Assurance Provisions to determine that these requirements have been met. 3 2. APPLICABLE DOCUMENTS 2.1 Governm
5、ent documents. - - - 2,l.l Specifications and standards. The following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Spe
6、cifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS Mi 1 i tary MIL-C-13931 - Cannon, General Specification for MIL-P-14232 - Parts, Tools and Equipment for Army Material, Packaging of MIL-1-45607 - Inspection Equipment, Acquisition, Maintenance and D
7、isposition of /THIS DOCUMENT CONTAINS 9 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-LOD LO m 7777706 0293302 5 MIL-C-l0888D(AR 1 STAN DARDS Mi 7 i tary MIL-STD-129 MIL-STD-1189 - Standard Symbology for Marking Unit Packs, Outer Conta
8、iners, - Marking for Shipment and Storage and Selected Documents 2.1.2 Other Government drawings. The following other Government documents, drawings, and ,publications form a part of this specification to the extent specified herein. on the date of the solicitation. Unless otherwise specified, the i
9、ssues shall be those in effect DRAW I NGS U.S. Army Armament, Munitions and Chemical Command EPL 8401603 EPL 11577220 Mast er LQAP 8401603 4.2 Inch Mortar: M24A1 Master LQAP 11577220 4.2 Inch Mortar: M33 8401603 - Mount, 4.2 Inch Mortar: M24A1 11577220 - Cannon, 4.2 Inch Mortar: M30 P 840 1840 LSPI
10、8401840 QAP-APPENDIX-WVA - General Quality Assurance Provisions 8767017 - Magnetic Particle and Visual Inspection of Thin-walled 8769067 - Engineering Parts List for Mount, 4.2 Inch Mortar: M24A1 - Engineering Parts List for Cannon, 4.2 Inch Mortar: M30 - Master Index of Quality Assurance Provisions
11、 for Mount, - Master Index of Quality Assurance Provisions for Cannon, - Special Packaging Instructions, Mortar 4.2 Inch Cannon - List of Special Packaging Instructions, Mortar 4.2 Inch M30on Mount M24A1 W/E Cannon M30 on Mount M24A1 W/E Cannon Tubes - Magnetic Particle Inspection of Cannon and Moun
12、t Components (Copies of specifications, standards, handbooks, drawings and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity). 2.2 Other publications. The following docume
13、nts form a part of this specification to the extent specified herein. issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. issues of documents not listed in the DoDISS shall be the issue of the nongovernment documents which is
14、current on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) Unless otherwise specified, the Unless otherwise specified, the ASTM D3951 - Standard Practice for Commercial Packaging (Application for copies should be addressed to the American Society for Testing and Mater
15、ials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL -C-l0888D ( AR I 2.3 Order of precedence. clause wherein specifications are listed last. the order of precedence is drawing requirements,
16、 followed by the text of this specification, then the other referenced specifications and standards. this specification shall supersede applicable laws and regulations unless a specific exception has been obtained. The applicable contract contains an order of precedence With regard to this specifica
17、tion, Nothing in 3 . REQUIREMENTS 3.1 General requirements. Cannon, parts thereof; and mounts, components, and parts thereof shall conform to: 8401603, the drawings and specifications listed in the Engineering Parts List EPL 11577220 and EPL 8401603, the requirements of this specification, the provi
18、sions of MIL-C-13931, and all referenced documents. Any conflicts are to be resolved by means of the order of precedence (see 2.3). 3.2 First article. The contractor shall submit a first article unless it is specifically waived in the contract (see 6.2). No first article requirements shall be waived
19、 without review and approval by the Procuring Contracting Officer. 3.3 Functioning. All parts shall operate without interference, erratic movement, or malfunction. the applicable general drawing, 11577220 or 3.3.1 Sight mount. The sight mount shall operate smoothly throughout its entire range of mov
20、ement. 3.3.2 Barrel pin assembly. The barrel pin 7136051 assembly shall operate smoothly. 3.3.3 Elevating mechanism. The elevating mechanism shall function through entire operating range. With the mortar set up in firing position, backlash crank-handle shall no exceed 10 degrees rotation in any posi
21、tion of elevat traverse. - the at the on or 3.3.3.1 Locking device. supporting tube in either the high or low position shall be positive in action. The device for locking the elevating mechanism into the 3.3.4 Traversing mechanism. The traversing mechanism shall function through the entire range of
22、movement. With the mortar set up in firing position, backlash of the traversing wheel assembly shall not exceed 10 degrees rotation in any position of traverse or elevation. 3.3.5 Shock absorber assemblies. The shock absorber assemblies on the tube and the shock absorber in the elevating standard sh
23、all function smoothly, 3.4 Performance. 3.4.1 High pressure resistance. The mortar shall be capable of withstanding a chamber pressure of 19,000 plus or minus 900 pounds per square inch when tested as specified in 4.5.2.9. 3.4.2 Functioning. components and mount during and after the testing specifie
24、d in 4.5.2. There shall -be no impairment in the functioning of the mortar 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LOD LO m 7997906 0293304 9 m *- d. - MI L-C-10888D (AR) 3.4.3 Bore enlargement. Bore diameters measured across the land
25、s after firing no more than 10 rounds shall not exceed the before firing diameters by more than 0.003 inches. There shall be no indication of abnormal wear, damage, or deformation of the bore surface. 3.4.4 Material soundness. After completion of testing, all parts shall be free from cracks and frac
26、tures and shall comply with any special soundness requirements specified on the applicable drawings including the provisions of this specification. 4. QUALITY ASSURANCE PROVISION 4.1 Responsibility for inspection. The contractor is responsible for the performance of al 1 inspection requirements as s
27、pecified herein. The contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such in
28、spections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. sections 3 and 5. All items must meet all requirements of The insriection set forth in this specification shall become a part of the contractors overall inspection
29、system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract, Sampling in quality con
30、formance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. b. c. First article ins
31、pection (see 43). First article - Initial Production Test, FA-IPT (see 4.4). Qual i ty conformance i nspect i on ( see 4.5 1. 4.3 First article inspection. shall be inspected by the contractor and submitted to the Government for approval. Inspection shall be in accordance with applicable Quality Ass
32、urance Provisions (QAPs) and QAP-APPENDIX-WVA. cannon and Master LQAP 8401603 for the M24A1 mount. shall be as specified in applicable item QAPs, or the contract, as applicable. First article mortar components and parts thereof shall be representative of the production processes to be used during qu
33、antity production. First article mortar components and parts thereof QAPs are listed in Master LQAP 11577220 for the M30 First article sample sizes 4.4 First Article - Initial Production Test (FA-IPT). contract. (see 6.2.1). First Article mortars shall be subjected to Initial When specified in the P
34、roductin Testing by- the Government to assure compliance with the requirements of this specification and any additional requirements listed in the contract. Initial Production Testing procedures and the sample sizes of First Article mortars and components thereof shall e as specified in the contract
35、. First 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-LOBBBD LO m 9999906 0293305 O m %-Y 2 MI L-C- 108881) ( AR) Article mortars and components thereof shall be representative of the production processes to be used during quantity producti
36、on. 4.5 Quality conformance inspection. Quality conformance inspection is listed in Table I. a TABLE I. Quality conformance inspection. Category/Characteri sti c Requirement paragraph paragraph Inspection Exami nations Inspection provisions Packaging Tests Functioning Sight mount Barrel pin assy (87
37、136051) E 1 evat i ng mechani sm Traversing mechanism Back 1 ash Lock i ng devi ce Shock absorber Perf ormance High pressure resistance Cannon Mount Bore enlargement Materi al soundness (F11577220 & F8401603) 5.1, 5.2, 5.3 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.3, 3.3.4 3.3.3.1 3.3-5 3.4 3.4.1 3.4.3 3.4.4
38、4.5.1.1 4.5 1 2 4.5.2.1 4.5.2.2 4.5.2.3 4.5.2.4 4.562.5 4.5.2.6 4.5.2.7 4.5.2.8 4.5.2.9 4.5.2.9.1 4.5.2.9.1.1 4.5.2.9.1.2 4.5.2.9.2 4.5.2.9.3 4.5.1 Exami nations. 4.5.1.1 Inspection provisions. Mortars, components, and parts thereof shall be inspected for conformance to requirements of this specific
39、ation, MIL-C-13931, QAPs listed in Master LQAP 11577220 for the M30 cannon and Master LQAP 8401603 for the M24A1 mount, and QAP-APPENDIX-WVA. 4.5.1.2 Packaging. shall be performed in accordance with the applicable special packaging instructions and MIL-P-14232. requirements of Section 5 and the cont
40、ract shall be cause for rejection. Packaging inspection for the level designated in the contract Packaging failing to comply with the packaging 4.5.2 Tests. 4.5.2.1 Functioning. Each cannon and mount shall be operated to determine smoothness of operation without any interference. be cause for reject
41、ion. Any evidence of binding shall 4.5.2.2 Sight mount. Each sight mount shall be rotated throughout its entire operating range. Failure to functior, Di- any evidence of binding shall be cause a 5 * Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
42、-C-LOBBBD LO 9 7477706 0273306 2 MIL-C-l0888D( AR) for reject i on 4.5.2.3 Barrel pin assy (7136051). The latch of each barrel pin assembly shall be rotated to lock the barrel pin assembly into the coupling bracket. function or any evidence of binding shall be cause for rejection. Failure to 4.5,2.4
43、 Elevating mechanism. The elevating mechanism of each mount shall be moved through its entire range of operation by rotating the elevating handle. Failure to function or any evidence of binding shall be cause for rejection! 4,5,2,5 Traversing mechanism, The traversing mechanism of each mount shall b
44、e moved through its entire range of operation by rotating the traversing wheel assembly, Failure to function or any evidence of binding shall be cause for reject i n . 4.5.2.6 BackTash. Backlash in the elevating and mount shall be measured under the conditions spec Backlash in excess of that specifi
45、ed in 3.3.3 and reject i on. 4.5.2.7 Locking device. The functioning of the elevating mechanism of each mount shall be tested procedures (see 3.3.3.11: traversing mechanism of each fied in 3.3.3 and 3.3.4. 3.3.4 shall be cause for ocking device for the tube in accordance with the following a. b. c.
46、d. Rotate the cam to withdraw the plungers and then raise the traversing mechani sm, Release the cam and continue raising the traversing mechanism until the high position is reached. Rotate the cam to withdraw the plungers, lower the traversing mechanism and check the locking action in the lower pos
47、ition of the traversing mechanism. At the high and low positions, the plungers shall make a complete entrance into the locking holes. Failure to function as specified shall be cause for rejection. 4.5.2.8 Shock absorbers. Each assembled mortar shall be gymnasticated by manually depressing the muzzle
48、 end of the cannon in a downward direction through the full range of all shock absorbers and releasing. The gymnastication shall be performed with the mount in each position specified in Table II. of the shock absorber assemblies shall be smooth and without any evidence of binding. After each gymnas
49、tication, the cannon shall return to its original firing position, specified in Table II. shall be cause for rejection. Functioning Failure to comply with the requirements 4.5.2.9 Performance. 4.5.2.9.1 Actual firing. Government personnel at a proving ground designated by USATECOM. Each cannon and mount shall be proof fired by 4.5.2.9.1.1 Cannon firing schedule. Each cannon or spare cannon shall be tested by firing one round of ammunition adjusted to produce a chamber
