AIR FORCE MIL-I-38357 A-1971 INDICATOR BEARING-DISTANCE-HEADING ID-1103A ARN《ID-1103A ARN型方位、距离、船首向指示器》.pdf

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1、FSC 5826 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS Federal- FED-STD- 1 FED-STB-209 FED-STD-595 Ili1 itary MIL-STD-100 MIL-STD- 12 9 MIL-STD- 130 MIL-STD- 143 MIL-STD-454 MIL-STD-46 1 MIL-STD-462 MIL-STD-4 7 1 MIL-STD- 704 MIL- STD = 7

2、 10 MIL-STD-781 MYL-STD-8 10 MITa-STD-8 3 1 MIL-STD-8 38 MIL-STD-883 MIL-STD-889 lis275 72 14S33558 Standard for Laboratory Atmospheric Conditions for Testing Clean Room and Work Station Requirements, Controlled Environment Colors Engineering Drawing Practices Efarking for Shipment and Storage Ident

3、ification Marking of US Military Property Standards and Specifications, Order of Precedence for the Selection of Standard General Requirements for Electronic Equipment Electromagnetic Interference Character ist ics Requirements f or Equipment Electromagnetic Interference Characteristics, Measurement

4、 of Maintainability Demonstration Electric Power, Aircraft, Characteristics and Utilization of Synchro, 60 and 400 Cycle Reliability Tests Exponential Distribution Environmental Test Methods Test Reports, Preparation of Lubrication of Military Equipment Test Methods and Procedures for Microelectroni

5、cs Diss imilar Metals Case, Instrument, Flange-mounted, Aircraft Numerals and Letters, Aircraft Instrument Dial, Standard Form of (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procu

6、ring activity or as directed by the contracting officer.) 3. REQUXNMENTS 3.1 Preproduction, This specification makes provisions for preproduction testing, 3.2 Selection of standards and specifications. Standards and specifications for necessary commodities and services not specified herein shall be

7、selected in accordance with MIL-STD-143. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-38357A 58 7777906 0157415 7 -1 MIL- 1-383578 (USAF) 3.3 Materials. Materials shall conform to the applicable specifications as specified herein. Material

8、s for which there are no applicable specifications, or which are not specifically described herein, shall be of the best quality, of the lightest practicable weight, and suitable for the purpose intended. 3.3.1 Fungus-proof materials. Materials that are nutrients for fungi shall not be used where it

9、 is practicable to avoid them. Where used and not hermetically sealed, they shall be treated with a fungicidal agent acceptable to the procuring activity. However, if they will be used in a hermetically sealed enclosure, fungicidal treatment will not be necessary. 3.3.2 Corrosive fumes. The material

10、s, as installed in the indicator and under the service conditions specified herein, shall not liberate deleterious fumes. 3.3.3 Metals. Metals shall be of the corrosion-resistant type or suitably treated to resist corrosion due to fuels, salt spray, or atmospheric conditions likely to be encountered

11、 in storage or normal service, 3.3.3.1 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals shall not be used in intimate contact with each other. Dissimilar metals are defined in MIL-STD-889, requirement 16. 3.3.4 Magnetic materials. of the indicator, excep

12、t where absolutely essential. 3.4 Design and construction Magnetic materials shall not be used for parts 3.4.1 Design 3.4.1.1 Re 1 iabil ity 3.4.1.1.1 Reliability program. The contractor shall establish a reliability program in accordance with MIL-STD-781. 3.4.1.1.2 Mean-time-between-failures (MTBF)

13、. The indicator shall have a minimum acceptable MTBF of 500 hours at a 90 percent confidence level. 3.4.1.1.3 Longevity, The indicator shall have a minimum operational life (equipment longevity as defined in MIL-STD-781) of 2,500 hours before wearout failures occur or the equipment consistently fail

14、s to meet the specified MTBF t requirements, 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NI Ly 1-3-8 35 7 A MIL-I-38357A (USAF) 3 . 4.1.2 Maintainability . 3.4.1.2.1 Qualitative requirements, The following shall be considered in the design of t

15、he indicator: a. Minimization o complexity of maintainance tasks (for example, calibration, adjustment, inspection, et cetera) by maximum use of simple design which includes optimum interchangeability and use of standardized equipment or commerc al items b. performances Rapid and positive recognitio

16、n of equipment malfunction or marginal c. needed CO perform maintenance Minimum number and types of tools and test equipment (special and standard) d. Optimum accessibility in all components requiring maintenance inspection, removal, or replacement. 3,4,1.2,2 Quantitative requirements. The indicator

17、 shall have a mean correc- tive maintenance downtime (M ) of 100 minutes, not including the time required to unseal and seal the indicator, The maximum corrective maintenance downtime (E$,= ) shall not exceed 300 minutes not including the unsealing and sealing time . Ct Ct 3.4.2 Construction. The in

18、dicator shall be so constructed that no parts will work loose in service. It shall be built to withstand the strains, jars, vbrations, and other conditions incident to shipping, storage, installation, and service. 3.4.2.1 The indicator shall be so constructed that overhaul, including replacement of

19、worn parts, adjustment, balance, and calibration may be accomplished by instrument and electronic repairmen provided with simplified tools and equipment, and trained in the repair of electronic equipment. 3.4.3 Case, The outline dimensions of the indicator case shall conform to 11527572 for the 3-in

20、ch size. Dimension L shall not exceed 7.5 inches, and dimension G shall be 0.470 to 0.545 inch. The case shall provide a hermetically sealed enclosure for the instrument mechanism. The design shall be such that the mechanism may be removed from the case, replaced, and the case resealed without the u

21、se of special tools or equipment, except as may be approved by the procuring activity. Electrical components of the indicator, which are in themselves sealed or otherwise suitable for replacement during the service life of the indicator, may be placed external to the sealed case under a suitable cov

22、er . 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-3835 7A (USAF) 3.4.3.1 Body and mounting flanges. shall be made of lightweight nonmagnetic metal, shall be uniform in texture, The body and mounting flanges of the case and shall have a smo

23、oth surface. (see 3.9.3.) 3.4.3.2 Filling medium, purity, free of dust particles, and shall not contain more than 0.006 milligram of water vapor per liter (dewpoint -65“) at the filling pressure. The filling medium shall be a mixture of 88 to 92 percent nitrogen and the remainder helium, The absolut

24、e pressure of the filling medium in the cace shall be approximately 1 atmosphere (12 to 14.7 psi). 3.4.3.2.1 Leakage. differential of 12 to 14.7 psi, the leak rate will not exceed 0.1 micron cubic foot per hour. The filling medium shall be of at least 98 percent The indicator case shall be so sealed

25、 that at a pressure 3.4.4 Electronic components. Electronic components and the application thereof shall be in accordance with MIL-STD-883 and the class 2 requirements of MIL- E-5400. 3.4,4.1 Electrical power requirements. She equipment shall be designed to meet all applicable requirements of MIL-ST

26、D-704. specified performance from the following power sources with characteristics as defined in MIL-STD-704 having limits as specified herein, except that the nor- mal input voltage shall be 26V ac. following: The indicator shall give The power required shall nob exceed the a. A-C- power (single ph

27、ase) 26V (constant frequency) Operating voltage limits . 24 to 28V Operating frequency limits 380 to 420 Hz Power 45va b. D-C power (28-V system) Operating voltage limits . 25 to 29V Power 4.5 3.4.4.1.1 Electromagnetic interference. i The indicator shall meet the electro- magnetic interference requi

28、rements of MIL-STD-461 for class Al equipment, 3.4.4.2 Undervoltage protection. below the minimum specified and shall automatically resume normal operation when The indicator shall riot be damaged by voltages the voltage returns within limits. 5 Provided by IHSNot for ResaleNo reproduction or networ

29、king permitted without license from IHS-,-,-F. H, J. K. L. M. N. P. R. S. T. U, V. w. Lead Y of single-bar bearing pointer synchro receiver Lead X of single-bar bearing pointer synchro receiver Lead H of single-bar bearing pointer synchro receiver 26-VI 40-H servo motor and rate generator excitation

30、 Lead H o all distance synchro receivers Lead X of double-bar bearing pointer synchro receiver Lead Y of double-bar bearing pointer synchro receiver Lead Y of hundreds synchro receiver Lead X of hundreds synchro receiver Lead X of tens synchro receiver Lead Y of tens synchro receiver Lead Y of units

31、 synchro receiver Lead X of units synchro receiver Leads 2 and C of all distance synchro receivers 6 fi ILI1 - 3K35 7 A c;8 pm 9 7 9 qq bplp4%-2- MIL- 1-38 35 7A (USAF) 3.4.4.3 Electrical receptacle. All indicator circuits shall be wired to a hermetically sealed receptacle mounted on the indicator.

32、The receptacle shall be a Cannon No. KH 30-21-30PN, or an approved equivalent. 3.4.4.4 Electrical connections, The following connections shall be used on the receptacle mounted on the indicator: A. Lead Y of compass card synchro control transformer B. Lead X of compass card synchro control transform

33、er C. Lead 2 of compass card synchro control transformer D. Lead C of compass card synchro control transformer and internal ground connect ion E. Leads 2 and C of single-bar bearing pointer synchro receiver 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I

34、HS-,-,-X. f28V d-c servo amplifier power Y. f28V d-c warning flag and thousands flag excitation Z. Warning flag control (-) a. b. Leads Z and C of double-bar pointer synchro receiver c. Thousands flag control (-) Lead H of double-bar pointer synchro receiver g. : SPARES h. i. Lead H of compass card

35、synchro control transformer Note: Synchro leads H (hot), C (cold), X, Y, and Z are designated as defined in MIL-C-5824. 3.4.4.5 Synchros. The two-bearing pointers and each of the three distance indications (hundreds, tens, and units) shall be driven by a torque receiver synchro 26V-llTR4C, or an app

36、roved electrical equivalent. The synchro control transformer shall be a 26V-llCT-4d, or an approved electrical equivalent. All synchros shall be in accordance with MIL-STD-710. 3.4.4.5.1 Mechanical drive. Connections between the synchros and their corresponding dials or pointers shall be at a ratio

37、of 1:l and as direct as possible. 3.4.4.5.2 Voltage. 400 +20 Hz. The synchros shall operate from a voltage source of 26V, 3 3.4.4,5.3 Electrical zero. the distance indicators shall correspond to electrical zero of the synchros as defined in MIL-S-16892. EIectrical zero of the bearing pointer synchro

38、s shall correspond to a bearing indication of 180 S when Oo N of the compass card is positioned under the lubber line. Zero (North) indication of the compass card and of 3.4.5 - Dial. specified, all visible portions of the dial shall be lusterless black, color No. 37038 of FED-STD-595. The dial shal

39、l be securely mounted in such a manner that it will not loosen or slip when the indicator is vibrated. If screws are used, they shall be so located that they will not interfere with the proper location of any dial marking. The dial shall be marked as shown on figure 1. Unless otherwise 7 i Provided

40、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I 60TYP TOP LUBBER LINE Il .i87 5.0034 L V6O0 TYP REFEREWE MARKSA 8094 rcratches, and striae that would interfere with the indicator. The cover glass shall be in accordance with MIL-G-81704 and its thickness sha

41、ll not exceed 0,200 ineh. The cover glass shall be lat and free from discoloration, 3.0.7 Eubricatkm. The indicator shall be lubricated in accordance with 1-11L-STD-838. 3.4.8 O. 005 inch from 52 3 Iiz; and - W,7g 52 . 3 to 500 Hz d, Low tenpraturc- -6506 (-85OF) 10 Provided by IHSNot for ResaleNo r

42、eproduction or networking permitted without license from IHS-,-,-e. High temperature-Operating +7OoC (f158OF) f, g. High temperature exposure- +70 (+158F) Humidity as encountered in any locale h. Fungus growth as encountered in tropical climates I ! i. Salt spray-Exposure to salt sea atmosphere, 3.6

43、 Part numbering of interchangeable parts. All parts having the same manu- facturers part number shall be functionally and dimensionally interchangeable. The item identification and part number requirements of MIL-STD-100 shall govern the manufacturers part numbers and changes thereto. 3.7 zcrew thre

44、ads. 3.8 Weight. 3.9 Finish. Protective coatings and finishes that will crack, chip, or scale during normal service life or due to extremes of atmospheric conditions shall not be used. Screw threads shall be in accordance with MIL-S-7742. The weight of the indicator shall not exceed 3.5 pounds. 3.9.

45、1 Aluminum alloy parts. covered with an anodic film conforming to MIL-A-8625. not anodize satisfactorily shall be coated with a chemical film in accordance with MIL-C-5541. Where practicable, aluminum alloy parts shall be Aluminum alloys that do 3.9.2 Iron and steel parts. Where practicable, iron an

46、d steel parts shall be cadmium, chromium, or nickel plated in accordance with QQ-P-416, QQ-C-329, and QQ-N-290, respectively. 3.9.3 Lndicator case. specified in 3.4.3.1 shall be finished as foiioWs: The body and mounting flanges of the indicator case 3.9.3.1 Body. finish. The body of the case shall

47、be finished in a durable black 3.9.3.2 Mounting flanges. The mounting flanges shall be finished in a durable lusterless black finish, color No, 37038 of FED-STD-595, 3.10- Nomenclature and nameplates. Unless otherwise specified, nomenclature assignment and nameplate approval for equipment shall be o

48、btained in accor- dance with the requirements of MIL-STD-130. 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-I-38357 5- W 7979706 0157q24 MIL-1-38 35 7A (USAF) 3,ll WorkmanshiE, The indicator, including all parts and accessories, shall be fa

49、bricated and finished in a thoroughly workmanlike manner, Particular attention shall be given to freedom from blemishes, defects, burrs, and sharp edges; accuracy of dimensions, radii of fillets, and marking of parts and assemblies; thoroughness of soldering, welding, brazing, painting, wiring, and riveting; alignment of parts, and tightness of assembly screws and bolts, 3,13,1