1、 Comments, suggestions, or questions on this document should be addressed to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to usarmy.detroit.rdecom.mbx.tardec-standardizationmai
2、l.mil. Since contact information 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 25GP METRIC MIL-DTL-11352K(AT) 01 April 2013 SUPERSEDING MIL-DTL-11352J(AT) 22 September 2010 DETAIL SPECIFICATION BLOC
3、K, VISION: BULLET-RESISTANT (METRIC) This specification is approved for use by the U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC), Research, Development and Engineering Command (RDECOM), Department of the Army, and is available for use by all Departments and Agencies
4、 of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers bullet-resistant vision blocks of two different types of construction, designed for use in combat type vehicles. In addition, this specification covers vision blocks with and without laser protection filters (see 6.1). 1.2
5、Classification. Vision blocks covered by this specification are to be of the following types, classes, and duties (see 6.2 and 6.5.1). All classes and duties are applicable to types I and II: Type I - Steel cased Type II - Plastic cased Class 1 - All-glass laminated construction Class 2 - Composite-
6、laminated glass-plastic construction Class 3 - Transparent, laminated plastic construction Duty A - Light (see 6.5 1) Duty B - Medium (see 6.5.1) Duty C - Heavy (see 6.5.1) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11352K(AT) 2 1.3 Part
7、 or identifying number (PIN). The PINs to be used for vision blocks acquired to this specification are created as shown below: M 11352 X X X Duty (see 1.2, Appendix A.4.1 and A.4.2.6) Class (see 1.2) Type (see 1.2) Specification Prefix 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in thi
8、s section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited 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 use
9、rs are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a par
10、t of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-53039 - Coating, Aliphatic Polyurethane, Single Component, Chemical Agent Resistant MIL
11、-PRF-62422 - Filter, Laser Hazard Protection MIL-DTL-64159 - Camouflage Coating, Water Dispersible Aliphatic Polyurethane, Chemical Agent Resistant DEPARTMENT OF DEFENSE STANDARDS MIL-STD-810 - Environmental Test Methods and Engineering Guidelines (Copies of these documents are available from https:
12、/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11352K(AT) 3 2.3 Non-Government publications. The fol
13、lowing documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). ASTM INTERNATIONAL ASTM C1036 - Standard Specification for Flat Glass ASTM E308 - Standard Test Method fo
14、r Computing the Colors of Objects by Using the Commission Internationale del Eclair (CIE) System (Copies of these documents are available from www.astm.org or ASTM International, P.O. Box C700, West Conshohocken, PA 19428-2959.) SAE INTERNATIONAL SAE AMS-L-P-391 - Plastic Sheets, Rods and Tubing, Ri
15、gid Cast, Methacrylate (Multiapplication) (Copies of this document are available from www.sae.org or SAE Customer Service, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of thi
16、s document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjecte
17、d to first article inspection in accordance with 4.2. 3.2 Materials. Materials shall be as specified herein, on applicable drawings, and in applicable specifications. Materials not designated on drawings and not covered specifically by this or referenced specifications shall be the prerogative of th
18、e contractor as long as all articles submitted to the Government fully meet requirements specified herein (see 4.6.1). 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provid
19、ed that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.2.2 Glass. Prior to lamination, the individual glass plies shall conform to ASTM C1036 for type 1, class 1 and quality 1 glass. The glass shall be free of co
20、lor to the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11352K(AT) 4 extent that a standard white target shall appear unchanged in color when viewed through a thickness of 2 centimeters (cm) 0.79 inch (in.) (see 4.6.1). 3.2.3 Plastic. The
21、plastic plies shall meet the requirements of SAE AMS-L-P-391 for type 1, grade A plastic, except that the material need not be acrylic (see 4.6.1). 3.2.4 Adhesive sealing compound. The adhesive sealing compound shall be silicones, epoxies, or other sealants meeting the environmental, ballistic, and
22、other pertinent requirements of this specification, or as specified on the applicable drawing. After application and curing, the compound shall be waterproof and shall adhere to both materials. It shall be non-shrinking and shall fill the space between the block and the case assembly. The compound s
23、hall be unaffected by fresh or sea water and shall not flow or become tacky at 71 degrees Celsius (C) 160 degrees Fahrenheit (F) (see 4.6.1). 3.3 Design and construction. The design and construction of the vision blocks shall be as specified herein and on the applicable drawings (see 6.2). Vision bl
24、ocks shall have not less than five interior plies excluding laser and spall protection elements (see 4.6.1 and 4.6.2). 3.3.1 Assembly details. The outboard ply of the vision block shall be positioned in the rigid case so that the acute angle is located within 1.6 millimeter (mm) (0.063 in.) from the
25、 adjacent edge of the case. The thickness of the sealing compound between the block and case shall be 1.60.4 mm (0.0630.016 in.) at all ground edges of the block. The outside edges of the case shall have a radius of 0.80.4 mm (0.0310.016 in.), and all sharp edges of the block shall be chamfered to 0
26、.8 to 1.6 mm (0.031 to 0.063 in.) prior to assembly in the case (see 4.6.1 and 4.6.2). 3.3.2 Case. The case for the vision block shall be either metal or plastic as specified in 3.3.2.1 and 3.3.2.2 (see 4.6.1). 3.3.2.1 Metal case (type I). The metal case for vision blocks shall be in accordance with
27、 applicable drawing (see 4.6.1). 3.3.2.2 Plastic case (type II). The plastic case for vision blocks shall be of a glass fiber base, epoxy resin, low pressure laminated, non-electrical material which is heat resistant to 260 C (500 F) or it shall be as specified on the applicable drawing. The materia
28、l thickness shall be 2.160.25 mm (0.0850.010 in.) (see 4.6.1). 3.4 Operating requirements. Each vision block shall provide the following functional, operational, and performance capabilities. 3.4.1 Photopic transmittance. For vision blocks without laser protection filters, the photopic transmittance
29、 shall be greater than 75 percent (%) unless otherwise specified on applicable drawings. The photopic transmittance of vision blocks with laser filters shall be greater than 42% (see 4.6.3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-1
30、1352K(AT) 5 3.4.2 Optical density. For vision blocks with laser filters, the optical density requirements for specific wavelength ranges shall be as specified in MIL-PRF-62422 (see 4.6.3.2). 3.4.3 Resolving power. Resolving power, over all areas that are 6.4 mm (0.250 in.) or more from the inner edg
31、es of the vision block case, shall be sufficient to permit detection of an angular separation of 75 seconds of arc (see 4.6.3.3 and 6.5.3). 3.4.4 Ballistic resistance. The vision block shall withstand the impact of the applicable type of projectile (see 4.6.3.4). 3.5 Interface requirements. Each ite
32、m shall accommodate the following inputs and interfaces. 3.5 1 Interchangeability. Interchangeability tolerance should permit parts, subassemblies and assemblies to be used in their parent assemblies without regard to the source of supply or manufacturer. Parts, subassemblies and assemblies having t
33、he full range of dimensions and characteristics permitted by the specification governing the part, subassembly or assembly should be usable as replacement items without selection and without departure from the specified performance guidelines of the parent items (see 4.6.2). 3.6 Support and ownershi
34、p. 3.6.1 Finish. Metal cases shall be cleaned in accordance with an appropriate method for the material being used and given a zinc phosphate spray application of not less than 1615 milligrams per square meter (mg/m2) (0.0053ounces per square foot (oz/ft2). The case shall be primed with an alkyd, co
35、rrosion-inhibiting, lead and chromate free primer coating, containing no more than 420 grams per liter (g/L) (3.5 pounds per gallon (lb/gal) of volatile organic compounds. A finishing coat shall be applied, chemical agent resistant, in accordance with MIL-DTL-64159 or MIL-DTL-53039, conforming to th
36、e color and infrared reflectance characteristics (see 4.6.2). 3.6.2 Identification marking. The identification marking shall identify the vision block number and provide a number for each item in accordance with the instructions on the item drawing. The marking shall not impair optical characteristi
37、cs of the vision block (see 4.6.2). 3.7 Operating environment requirements. The vision block shall operate under the following environmental conditions, without degradation in performance. 3.7.1 Temperature fluctuation resistance. The vision block shall withstand exposure to temperature extremes, fr
38、om minus (-) 54 to plus (+) 71 C (-65 to +160 F) without cracking or showing signs of distortion and shall subsequently meet the requirements of 3.4.1, 3.4.2, and 3.4.3 (see 4.6.4.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11352K(AT)
39、 6 3.7.2 Low temperature. The vision block shall meet the requirements of 3.4.1, 3.4.2, and 3.4.3 and shall show no indication of moisture build-up, bond separation or other forms of image degradation after being exposed to a temperature of -54 C (-65 F) for a period of 24 hours after stabilization
40、(see 4.6.4.2). 3.7.3 High temperature. The vision block shall show no indication of moisture build-up, bond separation or other forms of image degradation after being exposed to three 24-hour cycles of the hot, dry temperature profile. Subsequently, the vision block shall meet the requirements of 3.
41、4.1, 3.4.2, and 3.4.3 (see 4.6.4.3). 3.7.4 Basic shock. The vision block shall show no evidence of physical damage and shall meet the requirements of 3.4.1, 3.4.2, and 3.4.3 after being exposed to three sawtooth wave shock pulses applied in both directions along each of the three mutually perpendicu
42、lar axes. The peak amplitude of each pulse shall be 40 gravity units (g) for 11 milliseconds (ms) duration (see 4.6.4.4). 3.7.5 Gun fire shock. The vision block shall show no evidence of physical damage and shall meet the requirements of 3.4.1, 3.4.2, and 3.4.3 after being exposed to three gun fire
43、shock pulses applied in both directions along each of the three mutually perpendicular axes (see 4.6.4.5). 3.7.6 Vibration. The vision block shall meet the requirements of 3.4.1, 3.4.2, and 3.4.3 after being subjected to vibration levels for a total of 3 hours in each of the three mutually perpendic
44、ular axes at an ambient temperature of 60 C (140 F). At the conclusion of the test, the vision block shall be returned to room ambient temperature and show no evidence of physical damage (see 4.6.4.6). 3.7.7 Humidity resistance. The vision block shall evidence no delamination, or other physical dete
45、rioration after being exposed to the relative humidity and air temperature profiles, and subsequently, shall meet the requirements of 3.4.1, 3.4.2 and 3.4.3 (see 4.6.4.7). 3.7.8 Corrosion resistance. The vision block shall meet the requirements of 3.4.1, 3.4.2, and 3.4.3 and shall show no evidence o
46、f bond separation, corrosion or other physical damage after being exposed to a salt fog solution for 48 hours (see 4.6.4.8). 3.7.9 Weathering resistance. The vision block shall evidence no delamination or other physical deterioration when exposed to not less than 350 hours of simulated sunshine, and
47、 shall subsequently meet the requirements of 3.4.1, 3.4.2, and 3.4.3 (see 4.6.4.9). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11352K(AT) 7 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein a
48、re classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (CI) (see 4.3) 4.2 First article inspection. Unless otherwise specified (see 6.2), the Government shall select eight vision blocks produced under the production contract for first article inspection. First arti
49、cle sample shall include all of the verifications of table I. TABLE I. Classification of inspections. Title Requirement Inspection First article Conformance Exam Tests Sampling 100% Materials, design and construction 3.2 thru 3.3.2.2 4.6.1 and 4.6.2 X X Operating requirements 3.4 4.6.3 Photopic transmittance 3.4.1 4.6.3.1 X X Optical density 3.4.2 4.6.3.2 X X Resolving power 3.4.3 4.6.3.3
