1、MIL-M-18371E AMENDMENT 2 6 August 1979 SUPERSEDING AMENDMENT 1 31 May 1973 MI L ITARY SPEC1 FI CATI ON MIRRORS , EMERGENCY SIGNALING, MARK 3 This amendment forms a part of Military Specification ML-M-18371, dated 17 February 1969. PAGE 1 Add to the bottom of the page: “Beneficial comments (recommend
2、ations , addi ti ons , del eti ons ) and any pertinent data which may be of use in improving this docu- ment should be addressed to: Commanding Officer, Naval Air En- gineering Specifications and Standards Department (ESSD) Code 93, Lakehurst, NJ 08733, by using the self-addressed Standard- ization
3、Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter.“ 1.2 Classification - Delete and substitute: “1.2 Classification. The mirrors shall be of the following types and classes as specified (see 6.2): Type I - 2 inches by 3 inches Class .1 - mirror only Cla
4、ss 2 - mirror with sleeve set Type II - 3 inches by 5 inches Class 1 - mirror. only Class 2 - mirror with sleeve set“ 2.1 SPECIFICATIONS Federal Add “L-P-377 Plastic Sheet and Strip; Polyester“. Add “L-P-406 Plastics: Method of Testing“. FSC 6350 Licensed by Information Handling ServicesProvided by
5、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-18371E AMENDMENT 2 PAGE 2 Delete “PPP-B-636 Box, Fiberboard“ and substi tute “PPP-B-636 Box, Shi ppi ng , Fiberboard“. Delete “MIL-M-13508 Mirror Coating Process, Front Surfaced Aluminized, for Optical Elemen
6、ts“ and substitute “MIL-M-13508 Mirror, Front Sur- faced Aluminized, for Optical Elements“. the following: “(Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as
7、directed by the contracting officer. I Delete parenthetical source paragraph in its entirety and substitute PAGE 3 Add : “3.2.6 Polyester film. The material for the sleeve set shall be O.oQ3 inch thick and shall conform to Type III of L-P-377 except for the color. The polyester film for the sleeve s
8、et shall be No. 2 Red, True Blue, Green, and RP4 Orange (color designations of Martin Processing, Inc., P.O. Box 5086, Martinsville, VA 24112) or equivalent.“ 3.3 consist of two sleeves of heat-sealed polyester film and shall conform to Figure 6 or 7 as applicable. green on the other side. orange on
9、 the other side.“ Design - Add “The sleeve set for the Class 2 mirror shall One sleeve shall be red on one side and The other sleeve shall be blue on one side and 3.4 9ni.rrors with sleeve sets (if applicable)“. second line and substitute “1, 2, 3, 6, and 7“. Construction - Delete “Mirrors“ in the f
10、irst line and substitute Delete “1 through 3“ in the Add : PAGE 4 “3.4.4 Sleeve set. The two thicknesses of plastic for each sleeve shall be superimposed so that the edges and the center circular areas coincide. The three edges shall be bonded to each other by com- mercially comnon heat or electroni
11、c sealing devices or methods.“ 3.5.1 Flatness - Line 2, change “4.6.2“ to “4.5.2“. Page 2 of 9 /- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-18371E (2) 63 7777706 0237047 T MIL-M-18371E AMENDMENT 2 3.5.2 3.5.3 Clarity of vision - Line 2, c
12、hange “4.6.3“ to “4.5.3“. Reflectivity - Line 2, change “4.6.4“ to “4.5.4“. 3.5.4 -3.5.5 Add : Impact resistance - Line i, change “4.6.5“ to “4.5.5“. Exposure cycle - Line 1, change “4.6.61r to 114.5.61. “3.5.6 Transmittance and haze, Each sleeve shall have a trans- mittance of not less than 30 perc
13、ent nor more than 60 percent and a haze of less than 6 percent.“ PAGE 5 4.3 and substitute “mirrors (including sleeve sets, if applicable) shall“. 4.3.1 type and substitute “mirrors (including sleeve sets , if applicable) of each cl ass- and type. First article inspection - Second line, delete “mirr
14、ors shall“ First article samples - Third line, delete “mirrors of each PAGE 6 4.3.2, Fourth and sixth lines, delete “mirrors of each type and sub- stitute “mirrors (including sleeve sets, if applicable) of each class and type. 4.4 between the third last line and the second last line. Qual i ty confo
15、rmance inspection - Add “transmittance and haze“ 4.4.1.1.1, Delete and substitute: “4.4.1.1.1 End items. An inspection lot size shall consist of end items of only one class and type made essentially under the same conditions and from the same materials and components. The sample unit and the unit fo
16、r the expression of the inspection lot size of end items that conform tu Type I, Class 1, or to Type II, Class 1 shall be one mirror. The sample unit and the unit foi. the expression of the inspection lot size of end items that conform to Type I, Class 2 or to Type II, Class 2 shall be one mirror wi
17、th one sleeve set.“ 4.4.1.1.2 Preparation for delivery - Third and fifth lines, delete “one type and substitute “one class and type“. Page 3 of 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-18371E AMENDMENT 2 PAGE 7 Table I, second column,
18、delete “3.4 through 3.4.3, 3.6, 3.7 and Figure 1 through 3, as applicable“ and substitute “3.4 through 3.4.4, 3.6, 3.7, and Figures 1,2,3,6,and 7 as applicable“, “Transmittance 3.5.6 and haze Delete 3.4.1, 3.4.3, and Figures 1 through 3“ and substitute “3.4.1, 3.4.3, 3.4.4, and Figures 1,2,3,6, and
19、7 as applicable“. Add to Table I, first through fifth columns: 4.5.7 Inspection An acceptable qual i ty 1 eve1 of 4.0 defects per 100 units“ Level S-3 PAGE 8 4.5.1.1 “mirrors with sleeve sets (if applicable)“ . Table II - third defect, first column: not coincide“ and substitute “Top and bottom edges
20、 (except sleeves) do not coincide“. PAGE 3 Mirrors - First ine, delete “mirrors of one type and subsbitUte Delete “Top and bottom edges do Table II - Last defect, First column: Delete “Color of any Component not as specified“ and substitute “Color of any component (except sleeves) not as specified“.
21、 Table II - Add “Top and bottom edges (sleeves only) do not coincide“ in the first column. Add an “X“ opposite this defect tn the last column. Table II - Add “Color of any component (sleeves only) not as specified“ in the first column. col umn . Table III - First column, fifth line, delete “markings
22、 and“ and substitute “markings, each sleeve (if applicable), and“. Table III - Second column, second and third lines, delete “3.4.3, and Figures 1 through 3“ and substitute “3.4.3, 3.4.4, and Figures 1, 2, 3, 6, and 7“. 4.5.1.2 Preparation for delivery - Second line, delete “one type“ and substitute
23、 “one Class and Type“. Add an “X“ opposite this defect in the second Page 4 of 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.5 Impact resistance following: MIL-M-18371E AMENDMENT 2 PAGE 10 - Delete in its entirety and substitute the “4.5.5 Im
24、pact resistance. The mirror shall be placed on a hardwood frame as specified in Figure 5 so that the edges of the mirror, for 1/2 inch around the perimeter, shall only be supported by the frame. The front surface of the mirror shall be uppermost, support the edges of the mirror a minimum of 1 - 1/2
25、inches above a firm nondeflecting surface. An ll-pound shot tubular duck cloth .bag in its longitudinal plane, shall be dropped through a guiding tube as specified in Figure 5 onto the approximate center of the front surface of the mirror. After the bag . has been dropped onto the mirror, the mirror
26、 shall be examined for conformity to 3.5.4. disregarded. II 4.5.6 each sleeve that comprises the sleeve set as we71 as the mirror shall be subjected to the preceding exposure cycle test.“. The frame shall The size of the bag shall conform to Figure 5. Cracking or breaking of the back glass shall be
27、Exposure cycle - Add “If the sample unit is a class 2 mirror, PAGE 11 Top of the page - Delete Lines 5 and 6 in their entirety and substitute “-65 + 2 degrees Fahrenheit (-54 - + 1 degree Centrigrade) for 24 continuous hou rcT. Add : “4.5.7 Transmittance and haze. The transmittance and haze of the s
28、leeve shalTbehomethod 3022 of FED-STD-406. I 5. Delete title “Preparation for delivery and substi tute “PACKAGING“. PAGE 13 6.1 the requirements for a quiet authentication system for search and rescue parties. II 1.2)“ and - substitute b) Type, Class, and quantity desired (see 1.2)“. 6.2 Intended us
29、e - Add “The sleeve sets are to be used to fulfill Orderin data - Delete “(b) Type and quantity desired (see Page 5 of 9 i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-1372E (2) b3 m 97797Ob 0237050 T m MIL-M-18371E AMENDMENT 2 PAGE 19 Figur
30、e 5, Impact Resistance Frame - Delete in its entirety and substitute new “Figure 5, Impact Resistance Frame and Inspection Setup“. Add Figures 6 and 7. Custodians : Preparing Activity : Navy - AS Army - ME Air Force - 99 Navy - AS (Project No, 6350-0074) Rev i ew Act i vi ti es : Army - ME and AV Na
31、vy - AS Air Force - 11 and 99 User Activities: Navy - MC and CG Page 6 of 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-L8371E (2) 63 m 9779706 0237051 1 m 11 POUND SHOT BAG (FABRICATED FROM DUCK CLOTH) (APPROXIMATELY 2 DIAMETER BY 21 MNG)
32、DROP IN THE LONGITUDINAL PLANE i IMPACTAREA k-50R2- / A8 APPLICABLE I OR II MIRROR N I2 v-)4 b- FIRM NONDEFLECTING 1 ALL AROUND SURFACE SECTION C-C IMPACT REXXSTANCE FRAME MIL-M-183 71E Amendment- 1 8FOOT-6 I 6 Y 2 I l l l l l r -A r- I I I I I I I I T- 4 - PLEXIGLAS 8 FOOT FREE DROP -11 POUND SHOT
33、BAG (AFTER DROP) L -cTYPE I OR II u MIRROR IMPACT RESISTANCE FRAME IMPACT INSPECTION SETUP DIMENSIONS Tii INCHES. UNLFSS OTHERWISE SPECIFIED, TOLERANCES: FRACTIONS 11/16 FIGURE 5. IMPACT RESISTANCE FRAME AND INSPECTION SETUP L TUBE Provided by IHSNot for ResaleNo reproduction or networking permitted
34、 without license from IHS-,-,-MIL-M-1837 1E AMENDMENT 2 Y4 RED Or BLUE I -IC( kHEAT SEALED AREA GREEN or ORANGE SECTION E-E HEAT SEALED EDGE * A r.875 DIA 1!i 4.12 DIMENSIONS ARE IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCE: f ,062 HEAT SEALED EDGE .12 INCHES WIDE WITHIN SHADED AREA. FIGURE 7. S
35、LEEVE (TYPE II, CLASS 2) Page 8 of 9 U Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M- 1837 IE AMENDMENT 2 ! I RED Or BLUE GREEN or ORANGE HEAT SEALED 4 b AREA SECTION D-D ,625 DIA T- HEAT SEALED EDGE DIMENSIONS ARE IN INCHES. TOLERANCE: f: .O62 UNLESS OTHERWISE SPECIFIED, HEAT SEALED EDGE .12 INCHES WIDE WITHIN SHADED AREA. FIGURE 6. SLEEVE (TYPE 1, CLASS 2) Page 9 of 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
