1、P - MIL-L-6273D 62 m 7777906 0078038 T m MIL -L- 6 2 7 3D J NOVEMBER 1983 CUPERSE DING MIL-L- 6 2 7 3C (AS G) 29 Hay 1967 , MILITARY SPECIFICATION LIGHT, NAVIGATIONAL, BEACON, OBSTACLE OR CODE, TYPE G-1 This specification is approved by all Departments and Agencies of the Department of Defense. 1. S
2、COPE 1.1 Scope. This specification covers one type of 300-millimeter, fresnel lensed, obstacle or code, beacon navigational light, designated type G-1. 2. APPLICABLE DOCUMENTS. 2.1 Government documents. *2,1.1 Specifications and standards. Unless otherwise specified (see 6.21, the following specific
3、ations and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISSI specified in the solicitation, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-601 PPP-B-636 Boxes, Wood, Cleated-Plywood
4、Boxes, Shipping, Fiberboard MILITARY MIL-P- 11 6 Preservation, Methods Of MIL-T-7 04 MIL- C- 7 9 89 Cover, tight-Transmitting, For Aeronautical MIL-C-2505 O Treatment And Painting Of Material Lights, General Specification For ment, General Requirements For Color, Aeronautical Lights And Lighting Equ
5、ip- STANDARDS FEDERAL FED- STD- 59 5 Colors the Engineering Division, San Antonio Air Logistics Center, Kelly AFB, Texas . FSC 6210 ?HIS DOCUMENT CONVAINS 3). 3.2 Selection of specifications and standards, Specifications and standards for necessary commodities and services not specified herein shall
6、 be selected in accordance with MIL-STD-143. 3,3 Materials. 3.3.1 Fungus-proof materials; Materials that are nutrients for fungi shall not be used where it is practical to avoid them. Where used and not hermeti- cally sealed, they shall be treated with a fungicidal agent acceptable to the procuring
7、activity. enclosure, fungicidal treatment will not be necessary. 3.3.2 Metals, Metais shall be of the corrosion-resistant type or treated to resist corrosion due to fuels, salt spray, or atmospheric conditions likely to be encountered in storage or normal service. extent possible without jeopardizin
8、g the intended use of the item. However, if they will be used in a hermetically sealed *3,3.3 Reclaimed materials. Reclaimed materials shall be used to the maximum . * 3,4 Design and construction. that no parts will work loose in service. strains, jars , vibrations, and other conditions incident to
9、shipping, storage, installation,-and service. The light shall be so constructed that adjustments and repairs can be easily made by personnel of operating units and overhaul bases with tools normally available commercially. signed that weight is held to the minimum consistent with the necessary stren
10、gth and rigidity. The light shall be so designed and constructed It shall be built to withstand the The light shall be so de- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-L-6273D 62 W 7777706 007BLOO 4 MIL-L-6273D I) . (b - el, 3.4.1 %nerai a
11、rrangement. Figure 1. It shall be designed to aperate two lamps simultaneously, one in the upper section with base up, and one in the lower section with base down, The light shall be provided with suitable filter holders which shall permit easy installation of the color filters specified. shall be s
12、uch that continuous operation will not cause the temperature to rise to values which will cause damage to any of its parts. If ventilation is used, all vent holes shall be screened with corrosion-resistant screen of not less than No. 16 mesh with a 38% to 48% open area. 3.4.2 Focus, requiring no-foc
13、using t installation or in service, 3.4.3 Lens. meter cylindrical lens, divided sections. The glass shall be type 1, grade Dy aviation white con- forming to MIL-C-25050. 3.4.4 Lens frame. A hinged lens frame, fabricated from a nonferrous metal or from a ferrous metal protected to prevent corrosion,
14、shall be provided between the upper and lower lens to permit the light to be opened at the midpoint for relamping and installation of filters. The hinge between the two frames shall be of sufficient strength to hold the upper lens when the unit is opened. The hinge shall be equipped w5th a stop to p
15、revent the upper lens from being opened more than approximately 100 degrees. A method shall be provided for securely holding the upper and lower sections together when closed; Loops shall be so provided on the frame so that when closed it can be locked by means of a pad- lock. A weatherproof seal sh
16、all be provided between the upper and lower sec- tions to prevent water leakage. Each frame shall be equipped with holders for holding the color filters shown on Figure 2. The filter holders shall be padded to prevent breakage of the filters due to expansion caused by heat from the lamps. The filter
17、 holders shall be so located that spilled light will be reduced to a minimum. 3.4.5 Braces. Not more than three vertical braces or support bars shall be used in each section of the light. The braces shall be equally spaced and so arranged that the resultant dark spots of one section are offset from
18、the dark spots of the other section. 3.4.6 - Base. ferrous metal or a ferrous metal protected to prevent corrosion. flange of the base shall serve as the lower lens frame. Screened drain holes shall be incorporated in the base. of not less than No. 16 mesh. A watertightbushing box of a size that wil
19、l accommodate -the power supply cable shall be provided in the side of the base. The bushing box shall be attached to the assembly through a 3/4 inch standard conduit tapped hole to permit removal of the box and installation of a 3/4 inch conduit, if desired. The base shall also house the lower lamp
20、 socket and term- inal block. inch diameter holes located 90 degrees apart on a 13 1/4 inch diameter circle. 3.4.7 - Cap. metal protected to prevent co#rosion. in the cap. The light shall be essentially in accordance with The design of the light The entire optical system shall be of the fixed prefoc
21、us type The upper lens and lower lens shall each consist of a 300-milli- - Each may be a single unit or in two horizontally The base of the light shall be cast or fabricated from a non- The upper The screen shall be corrosion-resistant and The lower flange on the base shall be provided with four 13/
22、16 The cap shall be fabricated from a nonferrous metal or a ferrous The lower flange of the cap shall act as the upper lens frame. The upper lamp socket shall be housed 3.4.8 Socket. The lamp socket shall be of the mogul prefocused type. It shall be manufactured of glazed porcelain andof nonferrous,
23、 corrosion-resistant metal. position in the light without use of socket extensions and with a The design shall be such that the lamps will be located in the proper Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-627 3D minimum freedom of motion
24、. The light shall be so designed that t!ie specified 62011 lamps shall be correctly focused in the top and bottom sections without the use of shims or adapters under the sockets. The conductors-to the upper socket shall be located in the light in such come into contact with the lamps. The insulation
25、 of the conductors shall be satisfactory for use at the high temperatures which may exist inside the light. a manner that they will not Yellow Green Red 3.4.9 m. The light shall be designed to utilize a 620W, 120V, PS-40 clear bulb, 6-7A filament, 10,000 lumen, 5-11/16-inch light center length, 10-1
26、/16- inch maximum overall length, 3,000-hour life lamp in both the top and bottom sections. nished with the light. Unless otherwise specified (see 6.21, the lamp shall not be fur- O .40 0.15 . 0.13 3.4.10 Filters. the light. The filters shall be of class B, heat-resistant glass in accord- ance with
27、MIL-C-7989. The color specified (see 6.21 shall be type I, grade C in accordance with MIL-C-25050, Each filter shall be in accordance with figure 2, When specified (see 6.21, filters shall be furnished with 3.4.11 Insulation. All electrical wiring shall be fully insulated from the slight: housing. T
28、he insulation shall be such that it will withstand, at room. temperature, a l,OOOV, 60hertz root mean square potential between the con- ductors of the electrical circuit and between the conductor and ground, for 1 minute without failure. 3.5 Perf ormance. 3.5.1*Photometric. The light shall emit ligh
29、t from the horizontal to the zenith through the entire 360-degree horizontal area around the unit. main beam, when the light is equipped with the specified lamps, shall be at an angle of 3 degrees above the horizontal when either upper or lower lamp is operated. The 3.5.1.1 Clear (white) lights. low
30、er sections of the light assembly shall equal or exceed the values shown on figures 3 and 4. respective section when the light is provided with a single specified 620W lamp operating at, or corrected to, 10,000 lumens, If the vertical distribu- tion curve for a section, when tested, conforms to the
31、requirements of figure 4, except for the location of the curve, a 1-degree tolerance will be permitted; that ia, if shifting the specification curve 1 degree either way, with reference to the test curve, will make the test curve meet all other requirements of the specification curve, the light will
32、be acceptable. The light distribution from both the upper and The minimum values shown thereon shall apply to the 3.5.1.2 Colored lights. Colored lights shall be obtained by adding two color filters to white lights. When filters are installed, all the requirements for white lights shall apply, excep
33、t that the minimum candlepower values shall be multiplied by the transmission factors specified in table I, . TABLE I. Transmission factors. Color I Factors White 1 .o0 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-34 MIL-L-6273D DIMENSIONS IN INCH
34、ES . Figure 1. Light assembly f- .Y /- L, MAX PIOGUL PmFOCtJSED FRESNEL UNS FRESNEL LENS. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I I ! THICKNESS OF FILTER APPX 3/32 DIbENSIONS IN INCHES. UNLESS OTHERWISE CPECIPIED, TOLERANCES: FRACTION 2 1/6
35、4 Figure 2. Filter i_ -=- _ - 6- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-290 90 280 80 290 90 300 60 310 50 320 4 O MIL-L-6 2 7 3D 2200 140 230 130a 240 IZOC 250 110“ Figure 3. Horizontal distribution at a vertical angle of 3 Provided by IHSN
36、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FIGURE 4, Vertical distribution at all angles of azimuth except specified dark spots i . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-6273D 62 M 7777706 0078LO
37、b 5 M MIL-L- 6 2 7 3D -. a b e 3.5.2 Environmental. The light shall be capable of continuous outdoor duty under all weather condit ions and shall operate satisfactorily when subjected to the following environmental conditions: (a) (b) Rainfall as encountered in any locale Temperatures up to + 55C 3.
38、6 Part number of interchangeable parts. All parts having the same manufacturers part number shall be functionally and dimensionally interchangeable. The item identification and part number requirements of DOD-STD-100 shall govern the manufacturers part numbers and changes thereto. 3.7 Weight. The we
39、ight of the light, without lamps or filters, shall be not more than 65 pounds. 3.8 Finishes and protective coatings. The outside of the light except for the lens shall be finished in accordance with MIL-T-704, type C. The color shallbe yellow, color No. 23655, in accordance with FED-STD-595. All pai
40、nt and finishes used shall be suitable for the operating; temperatures involved. 3.9 Operat ional markings. 3.9.1 Instructions and wiring diagram. operation, and maintenance, together with a wiring diagram, shall be permanently and legibly mounted on the light. Brief instructions for installation, 3
41、.10 Identification of product. marked for ident if icat ion in accordance with MIL-STD-130. Equipment, assemblies, and parts shall be 3.11 Workmanship. The light, including all parts and accessories, shall be constructed and finished in a thoroughly workmanlike manner. attention shall be given to ne
42、atness and thoroughness of soldering, wiring, marking of parts and assemblies, welding and brazing, painting, riveting, machine-screw assemblies, and freedom of parts from burrs and sharp edges. Particular 3.11.1 Dimensions and tolerances. Dimensions and tolerances not specified shall be as close as
43、 is consistent with the best shop practices, Where dimensions and tolerances may affect the interchangeability, operat ion, or performance of the light, they shall be held or limited accordingly 3.11.2 Screw assemblies, Assembly screws or bolts shall be tight. The word “tight“ means that the screw o
44、r bolt cannot be appreciably tightened further without damage or injury to the screw, bolt, or threads. 3.11 3 Riveting. that the rivets are tight and satisfactorily headed. Riveting operations shall be carefully performed to insure 3.11.4 Cleaning. or excess solder, metal chips, and other foreign m
45、aterial, after final assembly. shall be removed. The light shall be thoroughly cleaned of loose, spattered, Burrs and sharp edges, as well as resin flash that may crumble, 4. QUALITY ASSURANCE PROVISIONS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
46、,-_. -_- -. - MfL-L-bZ73D b2 7999906 0098107 7 MIL-L-6273D 4 ,I Responsibility for inspection. contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. specified in the contract or purchase order, the contractor may use his own
47、 or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure suppli
48、es and services conform to prescribed requirements. Unless otherwise specified in the Except as otherwise *4,2 Classification of inspections. The examination and testing of the light shall be classified as follows: (a) (b) First article inspection (see 4.3) Quality conformance inspection (see 4.4) 4
49、.3 First article inspections. examination and tests specified under 4.5. First article inspection shall consist of the 4.3,l First article test sample tested by the contractor. specified (cee.6.21, the contractor shall subject one complete white light Unless otherwise and two filters of each color, representative of the production items, to the first: article inspection.
