1、 MIL-DTL-12713E 1 August 2012_ SUPERSEDING MIL-Q-12713D (MU) 10 August 1970 DETAIL SPECIFICATION QUADRANT, FIRE CONTROL: M1A3 This specification is approved for use by all Departments and Agencies of the Department of Defense 1. SCOPE 1.1 Scope. This specification covers Fire Control Quadrant: M1A3,
2、 used primarily for measuring angles of cant or elevation for various trajectory weapons. This item is commonly referred to as the Gunners Quadrant. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does no
3、t include documents in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all requirements of documents cited in sections 3 and 4 of
4、this specification, whether or not documents are listed in this section. Comments, suggestions, or questions on this document should be addressed to: Commander, US Army ARDEC, ATTN: RDAR-QES-E, Picatinny, New Jersey 07806-5000 or emailed to picaardecstdznbranchconus.army.mil. Since contact informati
5、on can change, you may want to verify the currency of this address information using the ASSIST online database at https:/assist.dla.mil. AMSC N/A FSC 1290 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. INCH-POUND Provided by IHSNot for ResaleNo reproduction or net
6、working permitted without license from IHS-,-,-MIL-DTL-12713E 2 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of thes
7、e documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-F-13926 - Fire Control Materiel, Manufacture, and Inspection, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1916 - DOD Preferred Methods for Acceptance of Product (Copies of fede
8、ral and military specifications, standards, and handbooks are available online at https:/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The follo
9、wing other Government documents, drawings, and publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (AR
10、DEC) DRAWINGS 13032529 - Quadrant, Fire Control: M1A3 (Application for copies of these drawings may be requested through email to pica.drawing.requestconus.army.mil or from U.S. Army ARDEC, ATTN: RDAR-EIS-PE, Picatinny, NJ 07806-5000) 2.3 Order of precedence. Unless otherwise noted herein or in the
11、contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Re
12、quired inspections. 3.1.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2.1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12713E 3 3.1.2 Conformance. A sample shall be
13、 subject to conformance inspection in accordance with 4.2.2. 3.2 Final assembly. Item shall conform to drawing 13032529. 3.3 Environmental. 3.3.1 Storage temperature. The quadrant shall be thermally stabilized at temperatures of +160 5 F and -60 5 F for a minimum of 4 hours at each temperature. Upon
14、 return to and stabilization at standard ambient temperature, +60 F to +90 F, the quadrant shall show no evidence of physical damage or failure and meet the requirements of 3.4 through 3.12 inclusive. 3.3.2 Operating temperature. The quadrant shall meet the requirements of 3.4 through 3.9 inclusive
15、while exposed and thermally stabilized at temperatures of +145 5 F and -50 5 F for a period of not less than 4 hours at each temperature. 3.4 End-for-end. The quadrant shall end-for-end with a correction no greater than 0.4 mil. 3.5 Micrometer. An increase of 10 mils of the gunners quadrant micromet
16、er shall result in a 10 mil increase in elevation within the width of a level vial graduation line as read using the gunners quadrant level vial. 3.6 High angle shoes. The gunners quadrant shall provide the same reading within 0.4 mils at 800 mils elevation using the quadrants high angle shoes as wh
17、en using the low angle shoes. 3.7 Accuracy. The gunners quadrant shall indicate angular readings from -10 mils to 1600 mils (with respect to the horizontal plane) accurate within 0.4 mils. 3.8 Torque. The running torque required to rotate the micrometer knob shall not exceed 2.0 inch-pounds througho
18、ut the operating temperature range of -50F to +145F inclusive. 3.9 Index alignment. With the micrometer dial indicating zero, the zero index line on the level vial holder shall coincide with the index line on the arm within the width of the index line on the arm. 3.10 Perpendicularity. The high angl
19、e shoes shall be perpendicular to the low angle shoes within .0004 inches. 3.11 Bubble size. The level vial bubble length shall be .60 .02 inches at 75F. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12713E 4 3.12 Workmanship. Workmanship o
20、f the M1A3 fire control quadrant shall be in accordance with the requirements of MIL-F-13926. 4. VERIFICATION TABLE I. Requirement/verification cross reference matrix. Method of Verification Class of Verification A - First Article B - Conformance 1 - Analysis 2 - Demonstration 3 - Examination 4 - Te
21、st Section 3 Requirement Description Verification Method Verification Class Section 4 Verification 1 2 3 4 A B 3.1.1 First article X X X 4.2.1 3.1.2 Conformance X X X 4.2.2 3.2 Final assembly X X X X 4.3 3.3.1 Storage temperature X X X 4.4.1 3.3.2 Operating temperature X X X 4.4.2 3.4 End-for-end X
22、X X 4.5 3.5 Micrometer X X X 4.6 3.6 High angle shoes X X X 4.7 3.7 Accuracy X X X 4.8 3.8 Torque X X X 4.9, 4.4.2 3.9 Index alignment X X X 4.10 3.10 Perpendicularity X X X 4.11 3.11 Bubble size X X X 4.12 3.12 Workmanship X X X 4.13 4.1 Classification of inspection. The inspection requirements spe
23、cified herein are classified as follows: a. First article inspection (see 4.2.1) b. Conformance inspection (see 4.2.2) 4.2.1 First article. When specified, a sample shall be subjected to first article verification in accordance with Table II. Provided by IHSNot for ResaleNo reproduction or networkin
24、g permitted without license from IHS-,-,-MIL-DTL-12713E 5 TABLE II. First article inspection criteria. Examination or Test Requirement Paragraph Verification Paragraph Final assembly 3.2 4.3 Storage temperature 3.3.1 4.4.1 Operating temperature 3.3.2 4.4.2 End-for-end 3.4 4.5 Micrometer 3.5 4.6 High
25、 angle shoes 3.6 4.7 Accuracy 3.7 4.8 Torque 3.8 4.9, 4.4.2 Index alignment 3.9 4.10 Perpendicularity 3.10 4.11 Bubble size 3.11 4.12 Workmanship 3.12 4.13 4.2.1.1 First article quantity. First article inspections shall be performed on three (3) complete units. 4.2.1.2 First article inspection to be
26、 performed. The first article inspection shall be performed in accordance with Table II. 4.2.1.3 First article rejection. If any item of the sample fails to comply with any of the first article requirements, the first article shall be rejected. 4.2.2 Conformance inspection. 4.2.2.1 Lot formation. Lo
27、t formation shall be in accordance with the lot formation requirements of MIL-STD-1916, paragraph “Formation and identification of lots and batches.” 4.2.2.2 Conformance inspection quantity. Conformance inspection quantities shall be in accordance with Table III and MIL-STD-1916, paragraph “Sampling
28、 of lots or batches.” Conformance criteria shall be in accordance with Table III and MIL-STD-1916, paragraph “Verification level (VL).” 4.2.2.3 Conformance inspection to be performed. The conformance inspection shall be performed in accordance with Table III. Provided by IHSNot for ResaleNo reproduc
29、tion or networking permitted without license from IHS-,-,-MIL-DTL-12713E 6 TABLE III. Conformance inspection criteria. Examination or Test Conformance Criteria Requirement Paragraph Verification Paragraph Final assembly VL-IV 3.2 4.3 Storage temperature 3 units per lot /1 3.3.1 4.4.1 Operating tempe
30、rature 3 units per lot /1 3.3.2 4.4.2 End-for-end 100% 3.4 4.5 Micrometer VL-IV 3.5 4.6 High angle shoes VL-IV 3.6 4.7 Accuracy 100% 3.7 4.8 Torque VL-IV 3.8 4.9, 4.4.2 Index alignment VL-IV 3.9 4.10 Perpendicularity VL-IV 3.10 4.11 Bubble size VL-IV 3.11 4.12 Workmanship VL-II 3.12 4.13 NOTES: /1 L
31、ot shall be accepted if there are 0 failures, and rejected if there are 1 or more failures. 4.2.2.4 Conformance rejection. If any item of the sample fails to comply with any of the conformance requirements, the lot shall be rejected. Provided by IHSNot for ResaleNo reproduction or networking permitt
32、ed without license from IHS-,-,-MIL-DTL-12713E 7 4.3 Final assembly. Drawing number 13032529 Classification Examination or test Conformance criteria Requirement paragraph Next higher assembly 7197156 Inspection method reference Critical Major 101 102 Minor 201 None defined Presence of Plate, Identif
33、ication, 8228871 Level vial cover shall be movable by hand, but not spin freely Evidence of poor workmanship 100% Level IV Level II 3.2 3.2 3.12 Visual Tactile 4.13 4.4 Environmental. 4.4.1 Storage temperature. The gunners quadrant shall be placed in the test chamber and the temperature of the chamb
34、er reduced gradually to -60 5F and shall remain at this temperature for a minimum of 4 hours. At the completion of this 4 hour period, the temperature shall then be gradually raised to +160 5F and the quadrant shall remain at this temperature for a minimum of 4 hours. At the completion of this 4 hou
35、r period the temperature of the test chamber shall be gradually reduced to room ambient temperature (+60F to +90F) at which time the quadrant shall be removed from the test chamber. The quadrant shall then be subjected to a visual and tactile examination to determine that there is no evidence of dis
36、tortion, cracks, level vial breakage, or undue irregularities of moving parts. Then conduct the tests of 4.5-4.13. The same units may be used for both storage temperature and operating temperature verifications, if desired. (See 6.7 Thermal shock.) 4.4.2 Operating temperature. The quadrant shall be
37、placed in the environmental chamber and the temperature of the chamber reduced gradually to -50 5F. The quadrant shall remain at this temperature for a minimum of 4 hours. At the completion of this 4 hour period, and within 10 minutes of removal from the environmental chamber, the quadrant shall mee
38、t requirements listed in 3.3.2. Upon completion of this portion of the test, the quadrant shall then be placed back in the environmental chamber and the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-12713E 8 temperature shall be raised grad
39、ually to +145 5F. The quadrant shall remain at this temperature for a minimum of 4 hours. At the completion of this 4 hour period, and within 10 minutes of removal from the environmental chamber, the quadrant shall again meet requirements listed in 3.3.2. Upon completion of this test, the quadrant s
40、hall be returned to the environmental chamber and the temperature shall be gradually reduced to room ambient temperature (+60F to +90F) at which time the quadrant shall be removed from the test chamber. The same units may be used for both storage temperature and operating temperature verifications,
41、if desired. (See 6.7 Thermal shock.) 4.5 End-for-end. The end-for-end correction is the reading shown on the gunners quadrant when it can be placed on a level surface in two opposing directions that both result in a level vial bubble that is centered within the width of a graduation line. This corre
42、ction shall not be greater than the tolerance specified. (See 6.6 for suggested test method.) 4.6 Micrometer. Zero the index arm and micrometer of the gunners quadrant. Place the quadrant on an adjustable elevation fixture and adjust the fixture to center the level vial bubble of the gunners quadran
43、t. Remove the gunners quadrant from the fixture, set the index arm to -10 mils, set the micrometer to 10 mils, and place the gunners quadrant back on the elevation fixture in the same orientation. Without adjusting the elevation fixture, the level vial bubble shall be centered within the tolerance s
44、pecified. 4.7 High angle shoes. Adjust the elevation angle test fixture to 800 mils elevation. Place the gunners quadrant on the fixture using the low angle shoes, adjust the quadrant to center the level vial bubble, and record the elevation as read from the gunners quadrant. Without adjusting the e
45、levation angle test fixture, remove the gunners quadrant, set to 800 mils elevation on the high angle scale, and then replace it on the fixture using the high angle shoes. Adjust the quadrant to center the level vial bubble, and record the elevation as read from the gunners quadrant. The difference
46、between the recorded elevation for the low angle shoes at 800 mils and the recorded elevation for the high angle shoes at 800 mils shall be within the tolerance specified. 4.8 Accuracy. Set a calibrated inspection aid to zero mils elevation then position it on the seat provided on the elevation angl
47、e test fixture. Adjust the test fixture until the inspection aid level vial bubble is centralized when the elevation angle test fixture is set for zero mils elevation. Set the quadrant under test to zero mils elevation and place it on the seat provided on the test fixture in the same position as the
48、 inspection aid. Adjust the gunners quadrant micrometer until the level vial bubble is centered within a level vial graduation line. If a negative correction is necessary, lower the quadrants index arm 10 mils and then use the micrometer to center the level vial bubble. The difference between the actual elevation and the elevation indicated by the gunners quadrant is the amount of error at that elevation. The error shall not be greater than the tolerance specified in 3.7. In addition, accuracy shall be tested at a minimum of 4 diversified angles of elevation while on the low angle shoes
