1、F 3 - 3 760s MIL-M-6330A 12 m 7777706 0330735 T m ):T,-$I- 46 3 1 Oh( 3%) S septexbcr 1863 SilicRSEDl NG 2.:1:-4631 O(0r) 28 April 1961 MILITARY SPECIFICATION NOUN”, TELESCOPE: M137 1. SCOPE 1.1 This specification covers performance requirements, quality assurancelprovisions, and packaging data rela
2、tive to a telescope mount designed primarily to provide adjustments in pitch and to compensate for angles of cant for indirect fire (see 6.1). 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 spec
3、i- - fication to the extent specified herein. S PEC IF ICATIONS Military MIL-F-13926 Fire Control Xateriel: General Specifica- tion Governing the Xanufacture and Inspec- tion of MIL-P-14232 Parts, Equipment and Tools for Army Materiel, Packaging and Packing of .MIL- 1-45607 Inspection Equipment, Sup
4、ply and Maintenance of Mi 1 itary MIL-STD-105 MIL-STD-109 MIL-STD-130 MIL-STD-202 Sampling Procedures and Tables for Inspec- Quality Assurance Terms and Definitions identification Marking of U.S. Military Test hsthods for Electronic and Electrical tion by Attributes Property Component Parts DUW INGS
5、 U.S. Army, Prankfor Arsenal F85 87 29 5 Xount, Telescope: X137 PACKAGING DAA SHIET 8587295 p.- Teleccope: M137 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-M-463LOA i12 Ob 0310736 L = - MIL-M:463108(NU) (Copies of specifications, stanclards,
6、 drawings, and packaging data sheets required by suppliers in connection with specific Iracurement functions should be obtained from the pocuring activity or as directed by the contracting officer.) 3. REQUIRENENTS 3.1 Fabrication.- The mount shall be manufactured in accordance with Drawing F8587295
7、 and drawings pertaining thereto. 3.2 General specification.- The contractor shall be responsible for adherence to the following requirements of MIL-F-13926: (a) Order of precedence (b) Dimensions and tolerances (c) Inorganic protective surface finishes (d) Part identification and marking (f) Workma
8、nship * (e) Electrical 3.3 Environmental. 3.3.1 Operating temperature.- The mount shall meet the applicable requirements of 3.4.3 to 3.4.6.1 inclusive while exposed and thermally stabilized at ambient temperatures of 3.6O0Fahrenheit (F) to +90F. mount shall then meet the requirements of 3.4.5 at +15
9、0 and -40F, subsequent to which the mount shall meet the requirements of 3.3.2. The 3.3.2 Vibration.- The mount positioned and supported in its using position shall be vibrated at a constant frequency of 30 cycles per second with an amplitude of 1/16 inch (1/8 inch total excursion) for a period of 5
10、 minutes plus or minus 15 seconds. Subsequent to vibration, there shall be no evidence of damage or physical failure and the mount shall meet the requirements of 3.4. . 3.3.3 Sealing (counter box area).- The counter box area of the mount shall be capable of sustaining an interim pressure of 2.0 f .2
11、 psi for a period of 2 hours (minimum) without loss of pressure in excess of 0.2 psi. 3.3.4 Rain test.- The mount shall meet the requirements of Procedure I of the rain test of MIL-F-13926. 3.3.5 Purging.- The counter box area of the mount shall be purged with dry nitrogen supplied at a pressure of
12、2 f: .2 psi until the dew point of the emergent gas Is no higher than -25F. quickly and positively closed to minimize intermingling of extsrnal atmosphei upon disconnecting of purging equipment. Purging apertures shall be 3.4 Performance. 3.4.1 Orientation.- The mount shall be posiisioned and orient
13、ated as follows: (a) The within 10 seconds fla: munt ing cur face o 2 the mounting bracket vertical 2 _? /- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i MIL-M-46310A 12 9999906 0310937 3 M1L-X- 46 3 1OA( NJ) (b) (c) (d) (e) (f) (g) The locating
14、keyway horizontal within 10 seconds The elevation and correction counters set at zero The quadrant seat shall be parallel to the plane of the locating key surface Y shown on Drawing F8587295 within .2 mil The top locating surface of the telescope support housing shall be parallel in all planes to su
15、rface “X“ of the keyway within 0.5 mil The elevation and cross level vial bubble shall be centered within the width of a graduation line The level vials shall be illuminated for a mnimum of five minutes (utilizing 24 volts) prior to readings and shall remain illuminated during all testing, except du
16、ring vibration The centerline passing through the two locating pins on the top surface of the telescope support housing shall be perpendicular to the vertical locating surface of the mounting bracket within 0.5 mil . (h) 3.4.2 Movement. 3.4.2.1 Elevation travel.- The mount shall travel through an ex
17、cursion of at least i333 mils in elevation and 89 mils in depression from the posi- tion established in 3.41 when the correction counter is set at zero. .- 3.4.2.2 Correction counter.- The correction counter shall travel through an excursion of plus and minus 9 mils. 3.4.2.3 Cross level travel.- The
18、 cross level knob shall move the mount through a minimum angle of 20 degrees to the right and 20 degrees to the left from the position established in 3.4.1. 3.4.3 Mount rigidity.- With the mount positioned as in 3.4.1, apply a 20 pound load at the right side of the telescope mounting flange in line
19、with - the locating pins. load at the left side of the telescope mounting flange in line with the locating pins. ment as indicated by the two readings shall not exceed the values of Table I. Release the load and record the movement. Apply the same Release the load and record the movement. The total
20、move- TABLE r MOVEPNT RIGIDITY ELEVATION (in mils) CANT (in degrees) TOTAL MOVEMENT .(in mils) O O .25 800 O .75 1100 O 1.75 1333 O 3.50 3.4.4 Accuracy.- With the mount positioned in accordance with 3.4.1, the following conditions shall be met. 3 I I l ,/- Provided by IHSNot for ResaleNo reproductio
21、n or networking permitted without license from IHS-,-,-MIL-M-Vb310A 12 M 7777906 0310738 5 U MIL-M-463 1OA (MU) 3.4.4.1 Plumb travel.- Kith the cross level vial bubble centered, the line of sight shall not deviate from a plumb line by more than 0.5 mil when the elSvation knob is actuated through its
22、 full range of movement. 3.4.4.2 Elevation error.- Elevation error shall not exceed 0.5 mil excluding backlash as read in 200 mil increments between zero and 1200 mils. 3.4.4.3 Backlash. 3.4.4.3.1 Elevation mechanism.- Backlash in the elevation mechanism shall not exceed 0.5 mil. 3.4.4.3.2 Cross lev
23、el mechanism.- Backlash in the cross level mechanism shall not exceed 0.5 mil. 3.4.4.4 Correction counter.- The correction counter shall be checked at plus and minus readings of 2, 5 and 9 mils. quadrant seat shall correspond to the correction values within 0.2 mil when the elevation counter is rese
24、t to zero reading. The angle of the gunners 3.4.4.5 Counter alignment.- Variation in the alignment of the numbers in the counter shall not exceed one sixteenth inch (1/16“). 3.4.4.6 Correction counter operation.- Plus values of 5 and 9 mils put on the correction counter shall subtract an equal numbe
25、r of mils from the elevation counter. counter shall add an equal number of mils to the elevation counter. Minus values of 5 and 9 mils put on the correction 3.4.5 Operating torques.- The maximum operating torques shall not exceed the values in Table II at temperatures indicated therein. TABLE II At
26、Standard Ambient Temperature of +60F to +90F and ae+15O0F at -400F Cross Level Knob 4 lb-inch min. to 12 lb-inch max. 25 lb-inch max. Elevation Knob 4 lb-inch min. to 14 lb-inch max. 25 lb-inch max. Elevation Correction 2 lb-inch min. to 4 lb-inch max. 8 lb-inch max. Knob 3 lb-inch Rheostat 1 lb-inc
27、h max. 3.4.6 Correct ion. 3.4.6.1 Cant correctioc.- Tne mount shall make left and right cant correction in accordance with the velues in Table III. The. elevation 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_. - - - MIL-M-463LOA 12 7777706 0310
28、737 7 TIL-M- 4 6 3 1 OA (HU) counter shall read withinplus or minus 0.5 mil of the elevation angle of the quadrant: seat. TABLE 111 CANT CORRECTION OUADRANT TOLERANCE (in mils) CORRECT1 ON ELEVATION (in mils) (in mils) (in mils) - CANT ANGLE 500 177.8 96.1 . 0.5 800 177.8 180.5 1.0 1000 177.8 271.9
29、2.0 3.4.7 Electrical 3.4.7.1 . Illumination.- The bulbs for the level vials and counters when energized with 24 volts shall provide sufficient illumination for the level vial markings and counter numbers to be clearly defined when observed in a darkened- area. 3.4.7.2 Insulation resistance.- Insulat
30、ion resistance shall not be less than 10 megohms when subjected to a direct potential of 100 Vdc however, the temperature specified in 3.3.1 shall be tised, mount shall meet the performance requirements outlined in 3.3,l. When thermaL2y stabilized at the specified temperature, the 4.6.1.2 Sealing (c
31、ounter box area).- The counter box portion of the mount shall be pressurized internally to the psi value specified in 3.3.3 with dry nitrogen for the Length of time specified in 3.3.3. pressure, the munter box area shall meet the requirements specified in 3.4.2, -25F, or exceed the accuracies depict
32、ed on Drawing F8665556. While under Dry nitrogen used in this test shall have a dew point of at least Accuracy of the test equipment used on this test shall be equal to 4.6.1.3 Rain test.- Prior to performing the rain test outlined in Pro- cedure I of MIL-F-13926, each mount shall be inspected to as
33、sure conformance to the insulation resistance specified in 3.4.7.2, when tested as outlined in 4.6.2.16. After completing the insulation resistance test, the mount shall then be subjected to the rain test outlined in Procedure I of MIL-F-13926. After completion of the.rain test, objectionable water
34、penetration shall be determined by repeating the insulation resistance test outlined in 4.6.2.16, There shall be no change between this reading and the preliminary insulation resistance reading. 4.6.1.4 Purging.- The counter box area of the mount shall be flushed with dry nitrogen gas to conform to
35、the requirements of 3.3.4. tester. (standard shop type test equipment) shall be used to measure the nitro- gen dew point for conformance with 3.3.4. Purging to be performed at standard ambient temperature and prior to performing temperature test. nitrogen remaining within the counter box area to be
36、between .25 and .5 psi. A dew point Pressure of 4.6.2 Performance testing. 4.6.2.1 Orientation.- To assure proper orientation, the mount and test fixtures and targets shall be oriented within the limits outlined under set- up instructions specified on Drawing F11730831. 4.6.2.2 Vibration.- Remove th
37、e adapter (FlL730831) from the mount and remove the mount from the test fixture and without disturbing any of the knob settings, vibrate the mount in accordance with Test Procedure V of MIL-F-13926; however, the time duration, frequency and amplitude shall be as outlined in 3.3.2. After vibration, v
38、isually inspect the mount for damaged or broken components. Do not rotate the knobs. 4.6.2.3 Post vibration.- Reassemble the mount and adapter (F11730831) to the fixture and observe coincidence between tne optical line of sight and the intersecting point of the target representing the viewing telesc
39、opes optical axis. the mount to a level and cross level position as indicated by the level and cross level vials. Read the error, if any, from the target. They must remain vithin the limits of 3.4.1 after adjusting Provided by IHSNot for ResaleNo reproduction or networking permitted without license
40、from IHS-,-,-4.6.2.4 Elevation travel.- With the mount and fixture positioned as outlined in 4.6.2.1, rotate the mounts elevation knob to reflect maximum elevation. Note the reading on the elevation counter. .Set this reading into Inspection Aid (Gunners Quadrant) A8658940. Position the inspection a
41、id on the quadrant seat assembly and by means of the fixture elevation handwheel, relevei. the inspection aid.“ Observe the elevation level bubble of the mount with respect to the quadrant level vial. level within the limits outlined in 3.4.2.1. .Repeat this procedure in the opposite direction, shal
42、l be measured by means of the quadrant, Both must indicate Any non-compatibility in level vial bubble position 4.6.2.5 Plumb travel.- With the mount and fixture set as outlined in 4.6.2.1, this test is made by sighting through viewing telescope F5549108 and observing coincidence between the telescop
43、es optical axis and the intersecting point of target centerlines while simultaneously rotating the mount in elevation and the test fixture an equal amount in the opposite direc- tion. The optical line of sight shall not deviate from the intersecting point by- more than the limits outlined in 3.4.4.1
44、 as measured by target mil blocks. During this total travel the cross level vial shall remain level within the limits of 3.4.4.1. 4.6.2.6 Elevation error and backlash.- With the fixture and mount positioned as outlined in 4,6.2.1, insert an elevation reading into the mount Use the elevation counter
45、as the recording mechanism. Insert this selected reading into the inspection aid and position the inspection aid on the quadrant seat assembly and by means of the fixture elevation handwheel releve1 the quadrant level vial, do not override this level position. Observe coincidence between both level
46、vial bubbles. Any non-compatibility between level vial bubble positions shall be measured by means of the quadrant: This difference, if any, shall not exceed the limits outlined in 3.4.4.2. Note this reading. Continue to rotate the elevation knob approximately one revolution beyond this-point of coi
47、ncidence. Return the knob to reposition the elevation level vial bubble to indicate level. Note the elevation counter reading. The difference, if any, in elevation reading is concidered backlash and must be within the limits outlined in 3.4.4.3.1. 4.6.2.7 Mount rigidity.- With the fixture positioned
48、 as outlined in 4.5.2.3, position the mount as specified in 3.4.1 with the level vial bubbles centered. Check rigidity by gradually applying and releasing the pressure specified in 3.4.3 at the top left side of the telescope support as specified in 3.4.3. Take the reading on the test target and reco
49、rd the movement. Repeat this procedure gradually applying and releasing the specified pressure at the top right side of the telescope support. Take the reading on the test target and record the movement. The total movement shall be within the allowable maximum deviation specified in Table I of 3.4.3. shall be followe as the simulated gun trunnion (cross leveling fixture) is moved from the “O“ position to the 1333 mil elevation position
