1、MIL-T-4b385A 32 m 77777Ob 0333578 1 m MIL-T-46385A(MU) 9 September 1968 SUPERSEDING MIL-T-46385(MU) 1 August 1963 MILITARY SPECIFICATION TELESCOPE, ELBOW: M114 1. SCOPE 1.1 This specification covers one type of elbow telescope known as Telescope, Elbow: M114. This telescope is primarity intended to
2、lay the 105MM Howitzer M102 in direct fire. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invita- tion for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS Military MIL-0-13830 MIL-F-13926 MIL-P- 1
3、42 32 MIL-1-45607 Optical Components of Fire Control Instruments: General Specification Governing the Manufacture, Assembly and Inspection of Fire Control Materiel: General Specifi- cation Governing the Manufacture and Inspection of Parts, Equipment and Tools for Army Materiel; Packaging and Packing
4、 of Inspection Equipment, Supply and Maintenance of STANDARDS Military MIL-STD-105 MIL-STD-109 DRAWINGS U.S. Army Frankford Arsenal Sampling Procedures and Tables for Quality Assurance Terms and Definitions Inspection by Attributes F8626440 Telescope, Elbow: M114 FSC 1240 Provided by IHSNot for Resa
5、leNo reproduction or networking permitted without license from IHS-,-,-MIL-T-46385A(MlJ) PACKAGING DATA SHEET 8626440 Packaging of Telescope, Elbow: M114 (Copies of specifications , standards, drawings and packaging sheets requirec by suppliers in connection with specific procurement functions shoul
6、d be obtained from the procuring activity or as directed by the contracting officer .) Q - 7 3. REQUIREMENTS 3.1 Materials.- Materials shall be in accordance with drawings, material specifications, and general specifications forming a part of this specification. 3.2 Fabrication,- The telescope shall
7、 be fabricated in accordance with Drawing F8626440 “Telescope, Elbow M114,“ and drawings pertaining thereto. 3.3 General specifications.- The contractor shall be responsible for adherence to and compliance with the following requirements of Specifications MIL-0-13830 and MIL-F-13926. 3.3.1 MIL-0-138
8、30. (a) Cleanliness (b) Illuminated reticle 3.3.2 MIL-F- 13926. (a) Order of precedence (b) Dimensions and tolerances (c) inorganic protective surface finishes (d) (e) Workmanship Part iden.tif icat ion and marking 3.4 Environmental. 3.4.1 Storage temperatures.- The telescope shall be exposed and th
9、ermally stabilized at ambient temperatures of -80“ and +160“F. Upon return to a standard ambient temperature of 60“ to 90“F, the telescope shall show no evidence of physical failure and shall meet the following requirements of this specification. 3.4.2 Operating temperatures.- The telescope shall be
10、 exposed and thermally stabilized at ambient temperatures of -40“ and +150“F. thermal stabilization at each of the above temperatures, the telescope shall meet the applicable requirements of 3.9. During 2, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
11、,-,-MIT-T-46385A L2 973790b 03LLb00 b m 3.5 Vibration.- The telescope shall be vibrated at a constant frequency of 30 cycles per second with an amplitude of 1/16 inch (1/8 inch total ex- cursion) for a period of 5 minutes f 15 seconds. Subsequent to vibration, the telescope shall show no evidence of
12、 damage or physical failure and shall meet the requirements of 3.6 to 3.10 inclusive. 3.6 Cleanliness.- The telescope shall meet the cleanliness requirements of Specification HIL-0-13830, and there shall be no more than two particles of dirt visible on the surfaces of the sliding reticle, and no mor
13、e than two particles of dirt visible on the surfaces of the reticle lens (a total quantity of four particles on both optical elements). be in excess of an area equivalent to a size ten dig. dirt on other surfaces which interferes with observation or adversely effects image quality. Each particle sha
14、ll not There shall be no 3.7 Sealing.- The telescope shall show no evidence of leakage when subjected to an internal pressure of dry nitrogen at 5 psig for five minutes. The interior atmosphere of the accepted telescope shall contain nitrogen (dewpoint of nitrogen shall be at least as low as -25OF)
15、at a pressure of between 0.1 and 0.25 psig. 3.8 Accuracy. 3.8.1 Orientation.- With the telescope mounted on the front mounting surface and the rear angular locating surface of the objective tube housing, the plane of the objective tube and the locating key shall be horizontal. 3.8.2 Collimation. 3.8
16、.2.1 Reticle lens.- The extreme left and- right zero graduations shall coincide with a horizontal target line 20 mils above the geometric axis of the objective tube with 40.5 mil. ballistic data on the reticle lens shall be 36.5 mils 5 3 mils in azimuth from the boresight cross of the sliding reticl
17、e at the zero elevation position. The vertical line of the HEXM482 3.8.2.2 Sliding reticle.- With the telescope positioned as in 3.8.1 and the horizontal line of the boresight cross in coincidence with the zero graduation on the extreme right, the horizontal line shall be in coincidence with the zer
18、o graduation on the extreme left with 0.2 mil; the line of sight through the boresight cross shall be parallel in azimuth to the geometric axis of the objective tube within 0.5 mil. 3.8.3 Eyepiece focus.- The eyepiece focus shall be adjustable over the range of plus and minus four diopters as read o
19、n the diopter scale. The zero of the diopter scale shall indicate zero diopters within 0.25 diopter. 3.8.4 Reticle accuracy.- The angular values, between the zero and maximum scale graduations for each of the three scales on the reticle lens shall be as indicated on the applicable drawings within 3.
20、0 percent. 3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PlIL-T-6385A 12 77777Ob 03LLbOL W 3.8.5 Image tilt.- With the telescope positioned as in 3.8.1, the image of a plumb line over the full field of view shall be vertical within one degree. 3
21、.8.6 Reticle shift.- Changing the direction of rotation of the reticle knob shall not cause the horizontal line of the boresight cross to exceed the tolerance specified in 3.8.2.2; nor shall cause the boresight cross to shift in azimuth in excess of 0.05 mil. 3.8.7 Resolution.- The resolution on the
22、 optical axis shall be five seconds of arc or less. 3,8.8 Reticle plumb travel.- With the telescope positioned as in 3.8.1, the line of sight through the boresight cross of the sliding reticle shall track a plumb line within plus or minus 0.5 mil, (total lateral spread not to exceed 0.5 mil) when th
23、e reticle is depressed by rotation over an excursion of 60 mils, as read on the mil scale of the reticle lens. 3.8.9 Parallelsim of reticle and image.- With the telescope positioned as in 3.8.1, the vertical line of the mil scale shall be parallel to the image of the plumb line within 30 minutes. 3.
24、8.10 Parallax.- With the boresight cross positioned with 2.0 mils of the optical axis, parallax at the boresight cross shall not exceed 0.25 mil between 125 yards and infinity. 3.9 Operability.- The running torque required to rotate the diopter adjustment and the reticle knob shall not exceed the va
25、lues specified in Table I at temperatures indicated when subjected to the requirements of 3.4.2. TABLE I - OPERABILITY Plus Minus Plus Control 60“ to 90F 40 OF 150F Diopter adjustment 5 inch lbs 9 inch lbs 5 inch lbs Reticle Slide adjust- 4 inch lbs 8 inch lbs 4 inch lbs ment 3.10 Illumination.- Whe
26、n illuminated, the markings on the reticle and reticle lens shall appear clearly defined when observed in a darkened area. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection.- Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance
27、 of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any other facilities 4. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-suitable for the performance of the inspection
28、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 inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 General provis
29、ions.- The component and subassembly inspection requirements of MIL-F-13926 form a part of the quality assurance provisions of -this specification. in MIL-STD- 109. Definitions of inspection terms shall be as listed 4,2 First article (initial production) approval .- The requirement for first article
30、 approval and the responsibility (Government or contractor) for first article testing shall be as specified in the contract. for first article approval tests shall consist of three (3) telescopes plus three (3) each of all items covered by SQAP. The sample shall be manufactured in the same manner, u
31、sing the same materials, equipment, processes, and procedures as used in regular production. All parts and materials, including packaging and packing, shall be obtained from the same source of supply as used in regular production. The sample 4.2.1 Government testing.- men the Government is responsib
32、le for conducting first article approval tests, the contractor, prior to submitting the sample to the Government, shall inspect the sample to insure that it conforms to all the requirements of the contract and submit a record of this inspection with the sample, including certificates of conformance
33、for materials. 4.2.2 Contractor testing.- When the contractor is responsible for conducting first article approval tests, the sample shall be inspected by the contractor for all the requirements of the contract. a record of this inspection, including certificates of conformance for materials, shall
34、be submitted to the Government or approval. The Govern- ment reserves the right to witness the contractors inspection. The sample and 4.3 Inspection provisions. 4.3.1 Submission of product.- Unless otherwise specified by the contracting officer, inspection lot size, lot formation and presentation of
35、 lots shall be in accordance with “Submission of Product“ provisions of “IL-STD-105. 4.3.2 Examination and tests. 4.3.2.1 Components and subassemblies.- All components and subassemblies shall be inspected in accordance with the inspection provisions contained in Supplementary Quality Assurance Provi
36、sions (SQAP) listed in the List of Inspection Documents (IEL), when provided with the technical data package (TDP). of MIL-F-13926 shall apply. In the absence of SQAPs the applicable Quality Assurance Provisions 5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license
37、from IHS-,-,-4.3.2.2 Final acceptance inspection.- Subsequent to first article approval, examination and tests related to Section 3 herein shall be performed on a single defect (individual characteristic) basis in accordance with MIL-STD-105 and the sampling plans specified in Table II herein. Exami
38、nation and tests for Packaging, Packing and Marking shall be in accordance with MIL-P-14232 and Section 5 herein. The tabulated classifica- tion of defects in Table II shall constitute the minimum inspection to be performed by the supplier after first article approval and prior to Govern- ment accep
39、tance or rejection by item or lot. TABLE II - CLASSIFICATION OF DEFECTS - CLASS CHARACTERISTIC REQUIREMENT CRITICAL 100% INSPECTION TEST PROCEDURE 1. Sealing 2. Pressure MAJOR AQL 1.0% DEFECTIVE 3.7 3.7 101. 102 103. 104. 105. 106. 107. 108. 109. 110. 111. 112. 113. 114. Pre-vibration collimation Vi
40、bration Cleanliness Post-vibration Eyepiece focus Reticle plumb travel Reticle shift Parallax Re so lut ion Image tilt Reticle accuracy Operability Illuminat ion Parallelism image however, the temperatures specified,in 3i4.1- and 3.4.2 shall apply. When the item under test has been stabilized at the
41、 temperature specified, the result of the specified test shall conform to the limits outlined in 3.4.1 and 3.4.2 using test procedures outlined herein. 4.6.1.2 Sealing.- This test shall be performed on a 100% inspection When using pressure test fixture, basis using testing equipment the accuracy of
42、which shall conform to the accuracy depicted on Drawing F8565556. the fixture shall be Set-up as outlined in Set-up instructions shown on Drawing F8565556. of -25F. adjust the pressure to- the pressure specified in 3.7 and maintain the pressure for the time specified in 3.7. Pressure to remain const
43、ant to assure compliance with 3.7. point tester to the exit port and purge the unit under test until -25F is recorded and seal the unit after adjusting the internal pressure in the unit to the value specified in 3.7. The gas used shall be dry nitrogen having a dew point After connecting the test equ
44、ipment to the unit under test, At the completion of the test, connect a dew Record this internal pressure, Internal pressure.- This test to be performed using standard 4.6.1.2.1 shop type pressure gage and standard shop type inspection techniques. test to be performed on a 100% inspection basis just
45、 prior to packaging. Any unit found not containing the internal pressure recorded in 4.6.1.2 shall be rejected and repressurized and retested in accordance with 4.6.1.2. All retested units shall be set aside for a minimum of 12 hours and then retested for internal pressure in accordance with 3.7. fa
46、il the second test, the unit is to be considered rejected. This Should the unit 4.6.2 Performance. 4.6.2.1 Orientation.- Position Fixture F7573980 in accordance with set-up instructions outlined on the drawing and position and secure Adapter . F8566269 and the unit under test to the fixture as outli
47、ned in ehe adapter Set-up instructions. Upon completion of all Set-up instructions, the unit shall be orientated as outlined in 3.8.1. 8, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permi
48、tted without license from IHS-,-,-MIL-T-46385A(MU) dioptometers optical axis to the optical axis of aun- under test and obtain a clear sharp image of the telescope reticle on the-opJical axis. Make all measurements on the dioptometer by adjusting the obje2t-i.yKassembly. Any and all adjustments to b
49、e within the limits of 3.8.3. Rotate the-, telescopes eyepiece assembly and observe the amount of rotation from the-. zero diopter reading for conformance to the requirement outlined in 3.8.3. 4.6.2.7 Reticle plumb travel.- With the telescope positioned as outlined in 4.6.2.2, observe where the intersecting point of the boresight cross of the sliding reticle falls with respect: to the intersecting point of the projected reticle cent
