1、7 15- o 1- q/ flIL-I-7227A 58 = 7779906 01118530 6 MIL-I-g229A( USAF) 20 OC“ 86 SUPERSEDING 4 SEP 1953 MIL-I-9229( USAF) a MILITARY SPECIFICATION INDICATOR, COURSE ID-387/ARN This specification is approved for use within the Department of the Air Force and is available for use by all Departments and
2、 Agencies of the Department of Defense. U. 1. SCOPE 1.1 Scope. This specification covers one type of electrical indicating instrument, designated Indicator, Course ID-387/ARN. 2. APPLICABLE DOCUPIENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and stan
3、dards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. O I. Ben
4、eficial cments (recmendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: WR-ALC/MMIRGN, Robins AFB, GA 31096-5609 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of
5、 this document or by letter. I I THIS DOCUMENT CONTAINS $6 PAGES. AMSC N/A . FSC 5826 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from I
6、HS-,-,-SPECIFICATIONS GP-5 13 PPP-B-636 QQ-M-151 QQ-2-325 MILITARY MIL-M-I4 MIL-P-116 MU-P-997 DOD-D-1000 MIL-C-SO15 MIL-C-5541 MIGA-8625 MIL-P- 15037 MU-P-15047 MIL-P- 17667 MIL-L-25 142 MIL-C-26861 STANDARDS MILITARY MIL-STD- 129 MIGSTD- i39 DOD-STD- 15 1 MIGSTD=794 MU-STD-8 I O MIL-STD- 1651 MS31
7、02 Plastic Sheet and Insulation Sheet, Electrical Boxes, Fiber Metals; General Specification for Inspection of Zinc Coating, Electrodeposited (Laminated, Thermosetting, Paper Base, Phenolic Resin) Wlding Plastics and Molded Plastic Parts, Thermosetting Preservation, Methods of Plastic-Material, Lami
8、nated, Thermosetting, Electrical- Drawings, Engineering and Associated lists Connectors, Electrical Chemical Films for Aluninun and Aluminum Alloys Anodic Coatings, for Aluninun and Alwninum Alloys Plastic-Material, Laminated , Thermosetting, Sheets, Plastic-Material, Laminated Thermosetting Sheets,
9、 Nylon Paper, Wrapping, Chemically Neutral Ltaninescent Materials; Fluorescent Cushioning Material, Elestic Type, General Insulating; Sheets, Glass Cloth, Silicone Resin Glass-Cloth, MelamineResin Fabric Base, Phenolic-Resin Marking of Shipments Identification Markings of U.S. Military Property Meta
10、ls; Test Methods Part and Equipnent, Procedures for Packaging and Environmental Test Methods and Engineering Guidelines Insert Arrangements for MIL-(2-5051, ML-C-22992 Connector, Receptacle, Electric, Box Mounting, Solder, Packing of (Classes C, J, and R) and MIL-C-83723 (Series II) Electrical Conne
11、ctors Type 2.1.2 ther Government docunents, drawings, and publications. The following other Government docuinents, drawings, and publications form a part of - this specification to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicit
12、ation. DRAWINGS U,S, Air Force 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-I-7227A 58 3777706 OZLIB532 T MIL-I-g229A( USAF) I I. 53Cl2824 53Cl28Z Indicator, Course ID-387/ARN, Face Design and Wiring Diagram ID-387/ARN, Course Indicator, Sc
13、hematic Connector Location PUBLICATIONS Air Force-Navy Aeronautical * 143 Specifications and Standards, Use of (Copies of specifications, standards, drawings, publications, and other Government docments required by contractors in connection with specific acquisition functions should be obtained from
14、 the contracting activity or as directed by the contracting activity. 1 specification to the extent specified herein. issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. the issues of documents not listed in the DoDISS shall b
15、e the issue of the nongovernment docunents which is current on the date of the solicitation. 2.2 other publications. The following docment forms a part of this Unless otherwise specified, the Unless otherwise specified, AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B 633 Zink on Iron and St
16、eel, Electrodeposited Coatings of (Application for copies of ASTM publications should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103 . 1 In the event of a conflict between the text of this specification and the references cited here
17、in, (except for associated detail specifications, specification sheets, or MS standards) the text of this specification shall take precedence. shall supersede applicable laws and regulations unless a specific exemption has been obtained. 2.3 Order of precedence. Nothing in this specification, howeve
18、r, 3. REQUIREMENTS 3 . 1 Material . 3.1.1 Specifications and standards. Specifications and standards for all materials, parts, and Government certification and approval of processes and equipment, which- are not specifically designated herein and which are necessary for the execution of this specifi
19、cation, shall be selected in accordance with Bulletin No. 143, except as provided in the following paragraph. 3i1.1.1 Standard parts. AN, MS, or MIL standard parts shall be used wherever they are suitable for the purpose, and shall be identified by their 3 O Provided by IHSNot for ResaleNo reproduct
20、ion or networking permitted without license from IHS-,-,-MIL-I-7229A 58 U 7797706 OLq8533 I a part numbers. pins, et cetra, may be used, provided they develop suitable properties and are replaceable by the AN, MS, or MIL standard parts without alteration, and provided the corresponding AN, MS, or MI
21、L part nunbers are referenced on the drawings and in the parts lists. corresponding AN, MS, or MIL part is in effect on date of invitation for bids, comercial parts may be used provided they conform to all requirements of this specification . Comercial utility parts such as screws, bolts, nuts, cott
22、er In applications for which no suitable 3.1.2 Metals, Metals shall be of the corrosion-resistant type or shall be suitably protected to resist corrosion during normal service life. Materials contained within hermetically sealed inclosures are considered to be suitably protected from corrosion. prot
23、ective treatment, anodizing of aluminum alloy parts and Zink coatings of steel parts are not applicable for parts within hermetically sealed instrunents. 3.1.3 Nonmagnetic materials. Nonmagnetic materials shall be used for all parts of the indicator, except where magnetic materials are essential. 3.
24、1.4 Fungus-proof materials. Materials which are not nutrients for fungi shall be used to the greatest extent practicable. that are nutrients for fungi must be used, such materials shall be treated with a fungicidal agent, as approved by the procuring agency. Requirements specified for fungicidal and
25、 corrosion- In cases where materials 3.1.5 Protective treatment. When materials are used in the construction of the indicator that are subject to corrosion in salt air or other atmospheric conditions likely to occur during service usage, they shall be protected against such corrosion in a manner tha
26、t will in no way prevent compliance with the performance requirements of this specification. The use of any protective coating that will crack, chip, or scale with age or extremes of atmospheric conditions shall be avoided. 3.1.6 Plastic materials. Laminated thermosetting plastic materials shall be
27、in accordance with the requirements of L-P-513, MIL-M-14, MIG P-997 MIL-P- 15037 , or MIL-P- 15047 . 3.2 Design, The indicator shall be designed for use with a radio receiving set and shall provide the facilities of a cross pointer indicator, a relative heading indicator, a course selector, an ambig
28、uity indicator, a reference heading signal for the automatic pilot through an approach coupler unit, and a marker beacon indicator. lateral positional deviation from a selected ani-range course or from the “on coursett glide sl6pe signal when landing with the aid of an instrument landing system, The
29、 relative heading indicator shall show the magnetic heading of an aircraft relative to a selected omni-range course. “he course selector flsetw knob shall be used to set up an omni-directional range course on the course indicator. The ambiguity indicator shall show whether the aircraft is on a ItTOt
30、t or ItFROMl1 radial (not aircraft heading). The marker beacon lamp shall provide visual indication of the marker beacon signals. The flag alarms shall provide non-operational indication of the associated electronic equipments. The vertical pointer shall indicate 4 Provided by IHSNot for ResaleNo re
31、production or networking permitted without license from IHS-,-,-. 3.3 Construction. The indicator shall be constructed so that no parts shall work loose in service. vibrations, and other conditions incident to shipping, storage, installation and service use. 3.4 Performance. The indicator shall meet
32、 the performance requirement of Section 4. It shall be built to withstand the strains, jars, 3.5 Details of components. 3.5.1 53C12824. internal mechanism of the indicator. that the internal mechanism may be removed from the case, replaced, and the case resealed. fixtures, unless otherwise approved
33、by the procuring agency. shall be so accomplished that the seal wil not be dependent upon materials which will be affected by the action of any atmospheric condition to which the indicator may be submitted. Indicator case. The course indicator case shall conform to Drawing The case whall provide a h
34、ermetically sealed enclosure for the The design of the indicator shall be such This shall be accomplished without the use of special tools and The hermetic seal 3.5.1.1 Case construction. The case shall be constructed of a suitable material applicable to hermetic sealing and the material shall be un
35、iform in texture with a smooth external surface. 3.5.1.2 Case gas mixture. nitrogen and helium in the approximate proportion of 90% nitrogen and 10% helium, by volume. The absolute pressure of the nitrogen-helium mixture in the case shall be approximately 1 atmosphere. least 99.5%, and water vapor c
36、ontent shall not exceed 0.02 milligrams per liter (9 grains per 1000 cubic feet) at the filling pressure. shall be atleast 981, and water vapor content shall not exceed 0.006 milligrams per liter at the filling pressure. The case shall be filled with a mixture of The purity of nitrogen shall be at T
37、he purity of helium 3.5.1.3 Bezel ring. The bezel ring shall be made of nonferrous low density metal and shall have a durable dull black finish. The ring shall be held in place by means of screws properly secured by lock washers or similar devices of approved design. The cover glass shall be suitabl
38、e for hermetic sealing and shall be clear, flat, and free from flaws which interfere with normal reading of the indicator. 3.5.2 Cover glass. 3.5.3 Face design. The face design shall be in accordance with Drawing 53C12824 . 3.5.3.1 Fixed heading scale. The construction and marking of the fixed headi
39、ng scale shall conform to Drawing 53C12824. The background of the dial shall be finished in durable dull black. The scale shall be calibrated from Oo to 45 in 5 graduations each side of the north position on the dial, and each side of the south position of the dial. The 45 points shall be 5 Provided
40、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-g229A( USAI?) labeled fI45“. North, south and 45 positions shall be indicated by triangular index marks. The length of the 5 graduations shall be approximately 1/16 inch and the length of the 10 graduatio
41、ns shall be approximately 1/8 inch. The width of the 5 graduations shall be approximately 0.015 inch and the width of the 10 graduations shall be approximately 0,020 inch, triangle index marks at the north and south positions shall be approximately 1/16 inch wide and 7/64 inch long. be held to an ab
42、solute minimum to eliminate parallax as much as possible. triangle marks at the 45 points shall be the same as those at the north and south position. The height of the nunerals shall be 0,090 inch, The Curvature of the fixed heading scale shall The 3.5.4 Course selector, The course selector shall co
43、nsist of a manually rotatable 360“ scale synchronized with a 30 cycle synchro resolver with a tow- phase rotor, the synchro of the relative heading indicator and the synchro control transformer. The course selector scale shall be direct reading in increments of one degree. or north shall correspond
44、to the zero or north indication from a slaved gyro magnetic compass, There shall be a clockwise rotation of the resolver rotor for corresponding increases in course selector settings, The setting knob mechanism shall so operate that a clockwise rotation of the knob produces an increasing course sett
45、ing, The mechanism shall be continuously rotatable, The gear ratio (setting knob to bearing scale) shall be approximately 16:l. Height of course selector numerals shall be at least 3/16 inch. Setting of the bearing scale shall be such that zero 3.5,Y.I Resolver, The resolver shall consist of a 30 cy
46、cle synchro resolver with a two-phase rotor and two-phase stator. For each phase of the resolver, the stator impedance shall be 169 plus 579 ohms and the rotor impedance shall be 400 plus JI25 ohms with a nominal tolerance of plus or minus 10% when energized from a 30 Hz power source, 3.5,4,1 1 a, E
47、ach rotor output voltage shall be 180 millivolts, plus or minus 105, under the following coexistent conditions: a, Both resolver stator phases are energized by a two-phase, 30 Hz power source , b, When there is a goo phase angle between the current through the two resolver stator phases. c, The volt
48、age across the 1000 ohm, plus or minus 1 ohm, noninductive resistor (A to B, figure 1) which is in series, with stator phase-1 is 2.07 volts, plus or minus 2%, and is equal to the voltage across the 1000 ohms, plus or minus 1 ohm, noninductive resistor (C to D, figure 1) which is in series with stat
49、or phase-2. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. VARIABLE PHASE GENERATOR 30 CYCLE I I I I - - I I I I I I I 1 I- - nl hd - I REFERENCE PHASE -90 WITH RESPECT TO REFERENCE I O I - - - - - - - - - -I - c sw A - REFERENCE PHASE I I GENERATOR 30 CYCLE I SET TO 2.43 VOLTS I- - - I I I PHASE I I I I 1- - - - - PHASE 2 - I STATOR - $lo% TO GND PHASE 2 PHASE 1 - ROTOR RESOLV
