1、 MIL-P-48450A 32 -zT -7 7779706 0433673 = - I- o. $ -a. 15 March 1976 SUPERSEDING MIL-P-48450 (MU) 25 January 1974 MILITARY SPECIFICATION PERISCOPE, TANK: M35E1 This specification is approved for use by all Departments and Agencies Of the Department of Defense. 1. SCOPE 1.1 This specification covers
2、 one type of combination passive - daylight tank gunners periscope designated Periscope, Tank: The periscope is a part of the fire control system in.the 105MM Gun Tank, M60 and is used for day and night sighting and observing. M35E1. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue
3、in effect: on date of invitation for bids or request for proposal form a part of this spec- ification to the extent specified. SPECIFICATIONS Military MIL-F-13926 MIL-P-14232 MIL- 1-4560 7 MIL-E-4 8441 MIL-B-48447 MIL-H-48590 STANDARDS Military MIL- S TD-105 MIL-STD- 109 MIL-S TD- 810 Fire Control M
4、aterial: General Specification Governing the Manu- facture and Inspection of Parts, Equipment and Tools for Army Materiel, Packaging and Packing of Inspection Equipment, Acquisition, Maintenance and Disposition of Elbow Assembly; Passive: 11733401 Body (Daylight) Assembly: 11744900 Head Assembly: 11
5、727486 Sampling Procedures and Tables for Inspection by Attributes quality Assurance Terms and Definitions Environmental Test Methods FSC 1240 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_-I I - MIL-P-4450A 32 777770b 0433674 T z I MIL-P-48450A(M
6、U) t DRAWINGS U.S. Army Frankford Arsenal F8247391 F11727450 FU732155 FU732156 F11738140 Test Fixture for Periscopes M32 and M35 Periscope, Tank: M35E1 Gage, Interchangeability, Minimum Gage, interchangeability, Maximum Final Acceptance Inspection Equipment PACKAGING DATA SHEET PSU727450 Packaging o
7、f Periscope, Tank: M35El (Copies of specifications, standards, drawings and packaging data sheet required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the con- tracting officer.) 3. REQUIREMENTS 3.1 Fabrication.- The
8、periscope shall be manufactured in accordance with Drawing F11727450 and drawings pertaining thereto. shall have met their respective specifications (except that they need not be subjected to separate temperature, vibration and shock tests) and be interchangeable within the requirements of this spec
9、ification. The following Elbow Assembly, Passive: 11733401 MIL-E-48441 Body (Daylight) Assembly: 11744900 MIL-B-48447 Head Assembly: 11727486 MIL-H- 4 8 5 9 O 3.2 Interchangeability. a. Modules.- The periscope shall meet the requirements of 3.6.2, 3.6.5, 3.6.6, 3.6.6.1 and 3.6.8 without need for rea
10、lignment of components or selection of modules listed in 3.1. Adjustments, other than those specified herein, are prohibited. b. Periscope with mount.- The periscope shall be capable of Ml18E1 (gages are specified in lieu of After insertion, the periscope shall be capable of insertion into the Mount
11、 Periscope: mount in 4.6.5.2). being firmly secured and subsequently removed. 3.3 General specification.- The contractor shall be responsible for adherence to, and compliance with the following requirements of MIL- F-13926. a. Order of precedence b. Diinensions and tolerances c. . Inorganic protecti
12、ve surface finishes d. Part identification and marking e. Workmanship 2 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-E MIL-P-48450A 12 977770b OLt31b7.5 1 3.4 Environmental. 3.4.1 Storage temperature.- The periscope shall show no evidence of cem
13、ent separation, glass breakage or other physical failure, and shall meet all the requirements of this specification at standard ambient temperature, plus 60“ to plus 90“ Fahrenheit (F), after having been exposed and thermally stabilized at temperatures of minus 80“ and plus 160F. 3.4.2 Operating tem
14、peratures.- The periscope shall meet the applicable requirements of 3.6.10 while exposed and thermally stabilized at temperatures of minus 40“ and plus 150F. 3.4.3 VibrationIShock. 3.4.3.1 Vibration “A“. - This requirement shall be met with the image intensifier tube and reticle projector lamp energ
15、ized by the application of +24 + 6.0 VDC to Contact.11733497 (Reference Drawing F11733401). of the periscope and mount. three mutually perpendicular axes of the periscope. The vibration shall be sinusoidal as follows: The vibration input to the periscope shall be at the interface Vibration shall be
16、applied along each of a. At a frequency of 5 Hertz (Hz), the acceleration shall be .65 G (peak). b. During a frequency sweep of 5 to 9 Hz, increase acceleration linearly from .65 to 1.5 Gs (peak). c. During a frequency sweep of 9 to 500 Hz, maintain constant acceleration of 1.5 Gs (peak). d. During
17、a frequency sweep of 500 to 9 Hz, maintain constant acceleration of 1.5 Gs (peak). e. During a frequency sweep of 9 to 5 Hz, decrease acceleration linearly from 1.5 Gs to .65 G (peak). f. At 5 Hz, the acceleration shall be .65 G (peak). The frequency of applied vibration shall be swept logarithmical
18、ly in 15 minute 5 1 minute sweep cycles for a total of two hours per axis. There shall be no failure or flicker of light emission from the image intensi- fier tube nor the reticle projector lamp during vibration and the periscope shall show no evidence of physical failure subsequent to vibration. FO
19、l1QWing the vibration test the periscope shall meet the requirements of 3.6.3.2, 3.6.4.1, 3.6.9, 3.6.2, 3.6.3.1, 3.6.3.1.1, 3.6.3.1.2, 3.6.5, 3.6.6, 3.6.6.1, 3.6.7, 3.6.8, 3.2, 3.1, 3.5 and then each module (see 3.1) shall meet their own respective post-vibration test requirements. 3.4.3.2 Vibration
20、 “B“.- This requirement shall be met with the image intensifier tube and reticle projector lamp energized by the application of +24 + 6.0 VDC to Contact 11733497 (Reference Drawing F11733401). The vibration input to the periscope shall at the interface 3 Provided by IHSNot for ResaleNo reproduction
21、or networking permitted without license from IHS-,-,- MIL-P-48450A 32 m 7779706 0433676 3 W MIL-P-4845OA(MU) of the periscope and mount. three mutually perpendicular axes of the periscope. be sinusoidal as follows: Vibration shall be applied along each of The vibration shall a. At a frequency of 5 H
22、ertz (Hz), the acceleration shall be 1.0 G (peak). b. During a frequency sweep of 5 to 500 Hz, maintain constant acceleration of 1.0 G (peak). c. During a frequency sweep of 500 to 5 Hz, maintain constant acceleration of 1.0 G (peak). d. At 5 Hz, the acceleration shall be 1.0 G (peak). The frequency
23、 of applied vibration shall be swept logarithmically in 15 minute 5 1 minute sweep cycles for a total of 15 minute + 1 minute along each of the three mutually perpendicular. axes (total vibration time 45 minutes + 3 minutes). emission from the image intensifier tube nor the reticle projector lamp du
24、ring vibration and the periscope shall show no evidence of physical failure subsequent to vibration. Following the vibration test the periscope shall meet the requirements of 3.6.3.2, 3.6.4.1, 3.6.9, 3.6.2, 3.6.3.1, 3.6.3.1.1, 3.6.3.1.2, 3.6.5, 3.6.6, 3.6.6.1, 3.6.7, 3.6.8, 3.2, 3.1, 3.5 and then ea
25、ch module (see 3.1) shall meet their own respective post-vibration test requirements. There shall be no failure or flicker of light 3.4.3.3 Shock.- This requirement shall be met with the image intensifier tube and reticle projector lamp energized by the application of +24 + 6.0 VDC to Contact 117334
26、97 (Reference Drawing F11733401). The shock input to the periscope shall be at the interface of the periscope and mount. The periscope shall be subjected to 24 cumulative shocks consisting of three each at 100 Gs, then 40 GIs, applied in each direction along each of the two mutually perpendicular ho
27、rizontal axes (all four sides). consisting of three each at 90 GIs, then 35 GIs applied in one direction along the verticle axis (normal operating position of periscope only). The shock pulse shall have a half sine wave. For 100 Gs + 10% and 90 GIs + 10% the shock pulse shall have a time duration of
28、 3 seconds; for 40 GIs + 10% and 35 Gs +lo% the shock pulse-shall have a time duration of 18 3 3 milliseconds. Subsequent to shock, there shall be no failure or flicker of light emission from the image tube nor the reticle projector lamp. physical failure. requirements of 3.6.3.2, 3.6.4.1, 3.6.9, 3.
29、6.2, 3.6.3.1, 3.6.3.1.1, 3.6.3h1.2, 3.6.5, 3.6.6, 3.6.6.1, 3.6.7, 3.6.8, 3.2, 3.2, 3.1, 3.5 and then each module (see 3.1) shall meet their own respective post-shock test requirements. The periscope shall also be subjected to six cumulative shocks .2 milli- The periscope shall also show no evidence
30、of Following the shock test the periscope shall meet the 3.5 Cleanliness. - With the periscope disassembled, the three modular units shall meet the following requirements: a. Defects.- There shall be no evidence of moisture, grease, fingerprints, condensates, fractures, and adhesive separations on a
31、ny glass component when viewing through either end of each module (including the unity power system). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I. MIL-P-48450A 12 W 7777906 0433677 5 E b. Dirt. (1) Body assembly (Daylight). There shall be no
32、more than three (3) particles of dirt or foreign material (classified as dirt) on any objective or eyepiece assembly. dirt particle shall not exceed 0.05 inch. The apparent size of any (2) Elbow assembly (passive). When viewing through the eyepiece with the image intensifier tube energized, there sh
33、all be no more than five (5) particles visible on the screen surface. any particle shall not exceed the apparent width of the reticle line. The size of (3) Head assembly. There shall be no more than three (3) particles of dirt or foreign material (classed as dirt) on any glass component. The size of
34、 any dirt particle shall not exceed 0.05 inch. 3.6 Performance. 3.6.1 Orientation. a. Datum Plane “W“ (Ref, Dwg. F11747303) defined by the four mounting pads in a vertical plane. on a horizontal plane. Datum Plane “J“ (Ref. Dwg. F11727486) b. Side “L“ (Ref. Dwg. F11727486) of the input coupling posi
35、- tioned 22 degrees 30 minutes with respect- to Datum Plane “W“ as measured in a vertical plane. NOTE: At no time shall the input coupling be allowed to strike hard against the travel stops. c. The requirements of 3.6.3.1 to 3.6.3.2 inclusive, shall be met with: (1) (2) (3) (4) (5) The clear filter
36、posieioned in the-field of view. An infinity target which is projected into Lens The eyepiece of the daylight system focused on 8289292 perpendicular to Datum Plane “W“ the image of the projected infinity target. The eyepiece of the Passive System focused on the screen of the image intensifier tube.
37、 A 1200 meter target provided for both the Daylight and Passive Systems d. Focus passive elbow assembly by rotating objective focusing Ring 11733436 for best resolution of target (1200 meters) image. 3.6.2 Parallax.- Parallax between the reticle and the image of a target at 1200 meters shall not exc
38、eed 0.1 mil when adjusted by Eccentric 10516549 on the daylight body assembly. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-P-48450A Li 7777706 0431678 7 I 3.6.3 Collimation.- The following collimation requdements shall be established prio
39、r to meeting the vibration/shock requirements of 3.4.3. a. An incident line of sight which is originally perpendicular within 0.2 mil to Datum Plane “W“. b. The input coupling positioned in accordance with 3.6.lb. 3.6.3.1 Pre-VibrationIPre-Shock, Passive reticle setting. - Rotate passive boresight k
40、nobs to establish coincidence of the boresight cross with the incoming line of sight (see 3.6.3a) prior to meeting the require- ments of 3.4.3. 3.6.3.1.1 Pre-VibrationIPre-Shock, daylight viewing area.- An in- cident line of sight which is originally perpendicular to Datum Plane “W“ shall coincide w
41、ithin 0.2 mil, with the image of an infinity target which is projected into Lens 8289292 perpendicular to Datum Plane “W“ prior to meeting the requirements of 3.4.3. 3.6.3.1.2 Passive viewing area. a. Elevation knob travel.- The boresight knob shall pro- vide a minimum travel of 6.5 mils in elevatio
42、n and depression from the collimated setting of 3.6.3a. b. Deflection knob travel.- The boresight knob shall provide a minimum travel of 6.5 mils in each direction from the collimated setting of 3.6.3a. c. Line of sight variation.- Variation in the line of sight in elevation, as the deflection knob
43、is rotated by at least 6.5 mils in each direction from the collimated setting of 3.6.3a shall not exceed 0.3 mil (total variation not to exceed 0.6 mil). 3.6.3.2 Post-Vibration/Post-Shock collimation. - The original collima- tion settings established in 3.6.3.1 and 3.6.3.1.1 shall not deviate more t
44、han 0.3 mil (including fixture error) as observed through eyepiece subse- quent to meeting requirements of 3.4.3. 3.6.4 Collimation repeatability. 3.6.4.1 Assembling daylight body and passive elbow to head assembly.- The daylight body and passive elbow assemblies shall be capable of re- peating an o
45、riginal line of sight within 0.20 mil when removed and rein- stalled (a minimum o 3 times) into the head assembly. 3.6.5 Image tilt - daylight and passive.- The image of a target line which is originally parallel to Datum Plane “J“ shall emerge from the eyepiece parallel to this same surface within
46、2.0 degrees of arc. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-T MIL-P-48450A 12 9999906 0431679 9 3.6.6. Parallelism of reticle and image, passive.- The image of a target line originally parallel to Datum Plane “J“ shall be parallel to the ho
47、rizontal reticle linewithin 2.0 degrees of arc. 3.6.6.1 Parallelism of target image and projected image.- The image of a target line which is originally parallel to Datum Plane “J“ and, perpendicular to Datum Plane “W“ shall emerge from the eyepiece parallel to Datum Plane “J“ within 2.0 degrees of
48、arc to the image of an infinity target line projected into Lens 8289292 which is originally parallel to Datum Plane “JI and perpendicular to Datum Plane “W“. 3.6.7 Objective focusing range. 3.6.7.1 Daylight.- Rotation of Eccentric 10516549 shall cause the objective assembly to travel a mnimum of 0.0
49、10 inch in each direction from the position established in 3 6,2. 3.6.7.2 Passive.- Roiation of Ring 11733436 shall cause the obje.ctive to bring targets from 50 meters to 3000 meters into focus. 3.6.8 Resolution. 3.6.8.1 Daylight.- less in all four meridians. Eyepiece focus shift between any two meridians shall not exceed 0.25 diopter. The resolution shall be 10 seconds or arc or 3.6.8.2 Passive,- The resolution shall be 1 minute of arc or l
