1、MIL-L-bbL7C b2 m 99797Ob 0098393 m MIL-L-6617C 1 November i977 SUPERSEDING MIL-L- 6 6 17B 26 September 1960 MILITARY SPECIFICATION LIGHT, TRAFFIC, AIRCRAFT TYPE B-2 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specifica
2、tion covers one type of aircraft traffic light, designated Type B-2. 2. APPLICABLE DOCUPENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposal form a part of this specification to the extent specified herein. SPECIFICATIONS
3、 FEDERAL W-C-440 14-C-5 9 6 / 3 NILITARY - Clips, Electrical, General - Connector, Plug, Electrical, Specification for. General Purpose, 2 Pole, 2 Wire, 15 Amperes, 125 Volts. MIL-V-173 - Varnish, Moisture-and-Fungus- Resistant (for Treatment of Communications , Electronic, and Associated Equipment)
4、. FSC 6210 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Command, ATTN: DRDME-DS, Fort Belvoir, VA 22060 by using the self- addressed Standardization Document Improvement Proposal (DD Form 142
5、6) appearing at the end of this document or by letter. US Army Mobility Equipment Research and Development - -. _ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-bb17C b2 W 9797906 0098194 b W MIL-L-6617C MIL-P-514 MIL-C-5015 MIL-E-5 55 8 ELL-C
6、-5756 MIL- E- 7 8 5 1 MIL- C- 7 9 8 9 MIL-F-14072 MIL-E- 17 555 MIL-C-25050 STANDARDS MILITARY MIL-STD-105 MIL-STD-130 ?AIL-STD-810 MS-3102 MS 24523 - Plates, Identification, Instruction - Connectors, Electrical, Circular and Marking, Blank. Threaded AN Type, General Specifi- cation for. craft use.
7、Portable. use, Application of. nautical Lights, General Specification for. - Enamel; Wrinkle-Finish, for Air- - Cable and Wire, Power, Electric, - Enamel; Wrinkle-Finish, for Aircraft - Covers, Light-Transmitting, for Aero- - Finishes for Ground Signal Equipment. - Electronic and Electrical Equipmen
8、t, Accessories, and Repair Parts; Pack- aging and Packing of. Lighting Equipment, General Require- ments for. - Colors, Aeronautical Lights and - Sampling Procedures and Tables for Inspection by Attributes. - Identification Marking of US Military Property. - Environmental Test Methods. - Connector,
9、Receptacle, Electric, Box Mounting, Solder Contacts, AN Type. mentally Sealed. - Switch, Toggle, One Pole, Environ- (Copies of speciification and standards required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the c
10、ontracting officer.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L- 66 17 C 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on
11、 date of invitation for bids or request for proposal shall apply. SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE Handbook. (Application for copies should be addressed to the Society of Auto- motive Engineers, 400 Commonwealth Drive, Warrendale, PA 15086.) SOUTHERN CALIFORNIA AIR POLLUTION CONTROL DISTRIC
12、T Rule 102 - Photochemically Organic Solvents. (Application for copies should be addressed to the Southern California Air Pollution Control District, 434 So. San Pedro Street, Los Angeles, CA 90013.) (Technical society and technical association specifications and standards are generally available fo
13、r reference from libraries. are also distributed among technical groups and using Federal agencies.) They 3. REQUIREMENTS 3.1 Deseription. The light, designed for two-handed operation, shall be similar to that shown on Figure 1 (see 6.4), and as specified herein. 3.2 First article (first-produced li
14、ght). The contractor shall furnish one or more lights as specified (see 6.2) for examination and testing within the time frame specified (see 6.2) to prove that his production methods and choice of design detail will produce lights that comply with the requirements of this specification. Examination
15、 and tests shall be as specified in Section 4 and shall be subject to sur- veillance and approval by the Government (see 6.3). 3.3 Material. Material shall be as specified herein. Materials not specified shall be selected by the contractor and shall be subject to all provisions of this specification
16、 (see 6.5). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-KCL-L- 6 6 17 C 3.4 Environmental conditions. The light shall perform as specified herein in any ambient temperature from plus 55 C to minus 54“ C at a relative humidity (rh) of up to 100
17、percent with condensation and with sand and dust conditions as encountered in arid regions. 3.5 Performance. 3.5.1 Light distribution, The light distribution in both horizontal and vertical planes, with the lamp specified in 3.6.1.4 operated at 70 spherical candlepower , without- color filter but wi
18、th cover lens , shall be not less than the minimum values shown on Figure 2. withstand the strains, jars, vibrations, and other conditions incident to shipping, storage, installation, and service. The light shall 3.6 Construction. 3.6.1 Optical system. The optical system shall be the fixed, pre- foc
19、us type requiring no focusing by personnel of the operating units. A rigid base plate shall be used to support the parabolic reflector assembly, lamp and filter holder, filter changing mechanism, and the two handles. rigidly fastened to the base plate, separate from the drum. The drum shall be so ar
20、ranged that it may be removed from the base plate without disturbing the assemblies thereon. Provisions for making adjustments during manufacture may be utilized if the adjustments are rigidly locked in place and will not be disturbed during routine maintenance. The parabolic reflector shall be moun
21、ted in a support 3.6.1.1 Principal reflector. The principal reflector shall be a para- The reflector shall bolic precision mirror of silver-backed glass. be protected by backing material and coats of paint. be so mounted that it is not subjected to undue strain and is protected from contact with met
22、al. The silver coating shall 3.6.1.2 Auxiliary reflector. A metal spherical reflector shall be so mounted in the light that the focus of the spherical reflector, the axis of the lamp, and the focus of the parabolic reflector coincide. The overall diameter of the spherical reflector and mounting shal
23、l be such that no direct light from the lamp is emitted. The spherical reflector shall be no larger than necessary to prevent emission of direct light. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-6617C 3.6.1.3 Filters. The light shall be
24、provided with one aviation red and one aviation green color filter. glass conforming to MIL-C-7989, Class B. The color transmission of the filters shall conform to MIL-C-25050, Type I, (a) Aviation Red and (c) Aviation Green. The filters shall be correctly positioned and firinly held in the light by
25、 a holder designed to minimize breakage of the filters. principal reflector, all light from the lamp incident upon the reflector shall pass through the filter. The filters shall be heat-resistant When either filter is positioned between the lamp and 3.6.1.3.1 Filter selector. A device shall be provi
26、ded to control the position of the color filters. and shall allow positive selection of either a red or green signal, as desired. of transmitting a mixture of two colored signals at one time is eliminated. The device shall be so arranged that the selected filter is held auto- matically in the proper
27、 position to produce the desired color. device shall be operated from the front cylindrical handle by rotating that handle. The device shall produce a white signal Positive stops shall be provided in order that the possibility The 3.6.1.4 Lamp. The light shall utilize a 50-candlepower, 6- to 8-volt
28、(V) RP-11 clear bulb, C-6 filament, 200-hour life, 7/8-inch light center length, 2-1/4-inch maximum overall length, single-contact prefocused base lamp, designation No. 1501 or equal. The lamp shall be accurately positioned and securely held in the light by a socket of the prefocus type. and furnish
29、ed with the light. Unless otherwise specified (see 6.2), a lamp shall be installed 3.6.1.5 Housing. The optical system shall be enclosed in a housing fabricated of aluminum. to protect and support components mounted on or within the housing. The housing shall be rigid and strong enough 3.6.1.5.1 Cov
30、er. A clear cover shall be provided at the front of the housing. The color and transmission of the cover shall be aviation white conforming to EL-C-25050, Type I, (e) Aviation White. The. cover shall be plastic conforming to MIL-C-7989, Class D. 3.6.1.5.1.1 Holder. The cover shall be firmly held in
31、a holder designed to fit on the front of the housing. This holder and cover assembly shall allow quick removal of the assembly without the use of tools. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-6617C 3.6.1.5.2 Connector. An E-3102 conn
32、ector socket conforming to MIL-C-5015 for connection to the leads Specified in 3.6.5.3 and 3.6.6 shall be located at the approximate midpoint of the base of the traffic light. 3.6.1.6 Color indicator. A plastic prism device shall be provided at the front of the light to redirect a small part of the
33、main beam to the operators eye. brightness that an operator with normal vision can distinguish the color of the filter in use in bright daylight. A dimming method shall be provided to regulate this color-indicating beam if the redirected light is too bright for comfortable use at night. The color in
34、dicator shall be of sufficient 3.6.2 Sighting device. A sighting device with front and rear sights shall be provided along the top of the light so that the light can be properly aimed. The centerline of the sight shall be parallel to the optical axis of the light. 3.6.3 Handles. Two handles as shown
35、 on Figure 1 shall be provided. The front handle shall be cylindrical in shape and shall be rotatable. 3.6.4 Hanger. A yoke-type hanger or other means shall be provided so that the light can be suspended from an overhead wire. The axis of the housing shall be essentially parallel to the ground when
36、the light is hanging from the overhead wire. readily removable from the light. Yoke-type hangers shall be 3.6.5 Transformer. A two-coil isolating transformer shall be provided in order that the light can be operated from a commercial 50/60-Hertz 120V source. The transformer shall have a minimum rati
37、ng of 50 Volt- amperes (VA) and shall be weatherproof. With 120V, 50/60-Hertz current applied to the primary, and with the specified lamp and lead installed, the transformer shall supply a voltage of 7 2 0.1V at the lamp. temperature rise of the transformer as determined by the resistance method sha
38、ll not exceed 65“ C when operating continuously at rated load and voltage. The transformer case shall have at least two holes for 1/4-inch mounting bolts. The dielectric strength between winding and case and between windings shall be satisfactory when tested at 1OOOV. The 3.6.5.1 Fuse. A small fuse,
39、 enclosed so that it is waterproof, shall be provided in the transformer secondary circuit. The fuse shall be rated at 32V, 10 amp. The fuse shall be easily accessible for changing. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-L-bbL7C 62 m
40、9999906 0098399 5 m MIL-L-6617C 3.6.5.2 Primary lead. The primary lead of the transformer shall be 2-conductorY 16-AWG cable conforming to MIL-C-5756. One end of the cable shall be permanently connected to the transformer and the other end shall terminate in a two-pole, parallel-blade connector conf
41、orming to W-C-596/3-2. The length of the lead shall be 3 feet. 3.6.5.3 Secondary lead. The secondary lead from the transformer to the light shall be 2-conductorY 16-AWG cable conforming to MIL-C-5756. One end of the cable shall be permanently connected to the transformer, and the other end shall ter
42、minate in an AN-type straight connector plug conforming to MIL-C-5015 and shall be compatible with the connector socket on the light. The length of the lead shall be 20 feet. 3.6.6 Auxiliary lead. An auxiliary lead shall be furnished for emergency operation of the light from a battery. 2-conductor,
43、16-AWG cable conforming to MIL-C-5756. One end of the cable shall terminate in an AN-type straight connector conforming to MIL-C-5015 and shall be compatible with the connector socket on the light. freeing 12-inch lengths of the two insulated conductors. Each con- ductor shall terminate in a spring
44、clip conforming to W-C-440, Type PC for connection to the terminals of a storage battery. The length of the lead shall be 10 feet. The lead shall be a The other end of the cable shall have the cable sheath removed, 3.6.7 Switch. The switch, which controls the operation of the lamp, shall be located
45、on or near the rear (pistol grip) handle in such a position that it may be easily operated by a finger of the hand holding the rear handle. The switch shall be a single-pole, normally-open, momentary-contact switch conforming to MS 24523-30. 3.6.8 Dimensions. The overall length of the housing shall
46、be not more than 15 inches and the diameter shall be not more than 9 inches. The overall height, from the top of the housing to the bottom of the pistol grip, shall be not more than 16-1/2 inches. 3.6.9 Weight. The weight of the light, without leads, shall be not more than 8 pounds. 3.7 Fungus and m
47、oisture resistance. The electrical circuitry, including all components and connections, except as specified below, shall be pro- tected from the effects of fungus growth and moisture by an overall 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
48、-L- 6 61 7 C treatment with a varnish conforming to MIL-V-173, Composition I or II, as applicable (see 3.7.1), with 1 percent copper 8-quinolinolate (by weight) based on the nonvolatile content of the varnish. (a) Components or circuit elements that are inherently fungus and moisture resistant or wh
49、ich are hermetically sealed need not be treated. (b) affected by the varnish coating shall not be treated. Components or circuit elements whose functions will be adversely -hen used, the varnish shall be applied by spray, brush, or a combination of both to give a dry-film thickness of not less than 1 mil to component or element surfaces previously cleaned and prepared so that the surfaces are free from all foreign matter which would interf
