1、J .- M I L- I - 1 8 8 5 6 B (AS) 27 OCTOBER 1969 SUPERSEDING MILI- 18856A(Wep) 20 October 1960 -.- MIIJTARY SPE CIC ATION INDICATOR, ANGLE OF ATTACK, 28X D. C. MS28062 and MS 28067 This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1. SCOPE 1.1 Scope - Thi
2、s specification covers design and all performance re- quirements for the 1-7/8 inch dial, MS28067, and 2-3/4 inch dial, hB28062, 28v d. c. angle of attack indicators. Configuration of each indicator shall be governed by the dash number for the Military Standard Drawing. 2. APPUCABLE DOCUMENTS 2.1 Ge
3、neral - The following documents of the issue in effecton the date of invitation for bids, form a part of this specification to the extent specified he re in. SPECIFIC 4.TIONS PIIilitary MIL- D- 10 O0 /l Drawings, Engineering and Associated Data AD L-C - 5 O 15 Connectors, Electric, AN Type .IhLC- 14
4、806 Coating, Reflection Reducing, For Instrument Cover / Glasses and Lighting Wedges / XIILI- 180 7 9 3EIL-T- 18303 .Installation of Angle of Attack and Sideslip Systems Test Procedures, -Production and Acceptance for Air- -craft Electronic Equipment, Format for .MIL-T- 19229 Transmitter, Angle of A
5、ttack or Sideslip, ha1 MILP-215G3 Paint System, Fluorescent, for Aircraft Application , . THIS DOCUMENT CONTAINS 21 PAGES. D Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-LB85bB 66 m 777770b 0327775 7 m i . IL-I-l8856B(AS) SPECIFICATIONS Mili
6、 t nry (Cont inucd) MIGL-25467 MIL-C-26482 MIG L-2 7 16 O MIGI- 81400 STANDARDS Mi lit arx MIGSTD-143 MIGSTD- 46 1 XILSTD-470 MIGSTD- 47 1 MIGSTD- 7 O 4 MIL-STD-781 BIL-STD- 785 MIGSTD-794 h.1 IL- STD- 8 1 O IUS24367 MS245 15 Lighting, Integral, Aircraft Instrument, General Specification for (Red) C
7、onnector, Electric, Circular, Miniature, Quick Disconnect Lighting, Instrument, Integral, White, General Spec- ification for .Instruments, Aircraft, General Specification for Specifications and Standards, Order of Precedence for the Selection of - Electromagnetic Interference Characteristics Require
8、- -merits . _Maintainability Program Requiremerits (for Systems .and Equipments) Maintainability Demonstration Electric Power, Aircraft, Characteristics and Utili- zation of Reliability Tests, Exponential Distribution .Requirements for Reliability Program . Parts and Equipment, Procedures for Packag
9、ing and Packing of _ .Environmental Test Methods -Lamp, Incandescent-Miniature Integral Lighting .Lamp, Subminiature Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-t MIL-I-185bB bb m 779770b 0129776 7 MI G I- 1 8 85 G B (AS) STANDARDS Military (Cont
10、inued) MS28062 Indicator, Angle of Attack, 2-3/4Dial, 28Volt D. C. MS28067 Indicator, Angle of Attack, 1-7/8 Dial, 28 Volt D. C. MS28105 Window, Dial - Aircraft Instrument Cover, Glass 34533585 Pointer, Dial, Standard Design of Aircraft Instrument Federal FED-STD-595 Colors 2.2 Availability of Docum
11、ents - When requesting any of the applicable documents, refer to both title and number. Copies of this specification and applicable documents may be obtainedupon application to the Commanding Officer, Naval Publications and Forms Center, Code 1051, 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120
12、. 3. XEQUIREhIENTS 3.1 Qualification - This specification makes provision for qualification . testing. 3.2 General DesignRequirements- Selection and use of parts and ma- terials and general requirements for design and construction shall be in accordance with the requirements of MIGI-81400. 3.3 Selec
13、tion of Government Documents - Specifications and standards for necessary commodities and services not specified herein and in MIGI-81400 shall be selected in accordance with MIL-STD-143. 3.4 Weight - The weight of each indicator shall not exceed that speci- fied for each dash number. 3.5 - Performa
14、nce shall nect the Test Methods of Sectiori 4. 3.5.3 Reliabilit; - The supplier shall establish a reliability assurance yrogrniii for the iiidicntor in accordance with MIL-STD-785. 3.5.1.1 Operational Stability - The indicator shall operate with satisfactory performance, continuously or intermittent
15、ly for a period of at least 1,500 hours with- out the necessity for readjustment or relubrication. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-F -MIL-I-15bB 66 7777706 0327777 O MIGI-l8856B(AS) 3.5.2 Operating Life - The, indicator shall have a
16、 minimum operating life of 6,000 hours with reasonable servicing and replacement of parts. Parts requiring scheduled replacement shall be specified by the supplier. 3.5.3 Reliability in Nean Timc Retween Failure (MTRF) - The indicator shall have 1.500 hours of mean (operating) time between failures
17、when tested and ac- cepted as outlined under the Reliability Assurance Test requirements. 3.6 - Dial andPointer - 3.6.1 Visibility ofDial - The pointer, numerals, at least 1/16th inch of the shortest graduations and all other specified markings on the dial shall be visible from any point within the
18、frustum of a cone whose side makes an angle of 20“ with a perpendicular to the dial and whose small diameter is the aperture of the case. 3.6.2 Dial Marking - The dial shall be marked as shown in Figure 1 or Figure 2, as applicable. 3.6.3 Pointer - The pointer of the indicator shall conform to Figur
19、e 1 or Figure 2. 8s applicable. 3.7 . CoverGlass - The dimensions of the cover glass shall be in ac- cordance with MS28105 unless the glass is part of the integral lighting. 3.7.1 Cover Glass and Wedges - The indicator cover glass and any other transparent element between the glass and the dial, suc
20、h as a lighting wedge, shall be provided with a reflection reducing coating that meets the requirements of MILC- 14806. 3.7.2 Cover Glass Mounting - The distance from the -inner surface of the cover glass to the surface of the dial on which the marking is applied shall not exceed O. 25 inch. 3.8 3.8
21、.1 Electrical Requirements - Fuses or circuit breakers not pedtted. Primary Input Power Requirements - The indicator shall give specified performance from power sources with characteristics as defined in MIL- STD-704 having limits as specified herein. The power required shall not exceed the specifie
22、d amounts. (a) D.C. power 28v Category ItB“ 10 watt max for servo. 3.8.1.1 Integrally LightedIndicator - The integrally lighted indicator, op- -erating on 5 f O. 1 volts a. c. or d. c. , 3 watts max. for exch color, using lamps .MS24367-715AS15 or MS24515-718AS15, shall illuminate all markings withi
23、n the indi- cator case as specified in MILL-25467 and MILL-27160 for the red and/or white integral lighting utilized. -. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-30 . -_ HEIGHT OH UrJFH OF LINE MARKING LENGTH OR GRADUATION +. O10 f. 005 MIL-
24、I-3885b 66 977790b 0327778 2 MATERML OR FIhTSH EQUAL SPACES DIAL ANGLEOF ATTACK - MAJOR GRADUATIONS INTERMEDIATE GRADUATIONS NUMERALS LETTERS SHADED PORTION OF POINTER - ,120 . O90 h L.8402 .O29 .o21 ,023 .o21 LUS r E RLF ss WHITE NO. 3787: OF FED-SID-595 R .125 a 093 CLIMB AND REFERENCE INDICES BAC
25、KGROUKD OF POWER WARNING FLAG “OFF“ MI L-I- 18 3 5GB (AS) .i343 R .970 R STALL WARNING INDEX CENTERED OPTIMUM INDEX f 9073.125 REF INDEX CRUISE INDEX - -e F 1,UORESCEN RED-ORANGE - - PER MILI-21563 POINTER MS33585-8 INDICES - REFERENCE BACKGROUND OF DIAL UXSHADED PORTION OF POINTER AXD REFERENCE IND
26、ICES *OFFFI hIS28067 ADD PROPER DASH NO.) A LUSTER LESS - - BLACK KO, 37036 OF - FE D-STD- 59 5 - - .O47 ,016 DIJIENSIOXS Jh IXCHES. UNLESS OTHERRqSE SPECIFIED, TOLERANCES: +. O10 ASGLES Clo. NUMERAM SHALL DISTINCTLY INDICATE THE GRADUATION TO WHICH EACH APPLIES. Figure i. mial - Angle of Attack Ind
27、icator, 2-Inch Case Nominal Size, 1-7/8 Inch Dial. c r, and switching points. ten and twenty-six coincide with the center of the fixed referencc rpctor, Low-medium range will be By this adjustment it shall be possible to make any indic.-:-lr reading between 3.11.2 Switches- Each switch one through f
28、our shall be actuated by the -pointer position relative to the fixed 3 oclock reference index reprdless of the dial Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-I-LSbB bb 777770b OL237L 2 MIL- I- 1 8 8 5 6 B (AS) unit value set at this index
29、. hitch No. 1 -1. O unit helow 3 oclock Position Switcn So. 2 O. 5 unit I)elow 3 oclock Position Switch KO. 3 O. 5 unit above :I oclock Position Switch No. 4 1. O unit above 3 oclock Position Switch No. 5 - used for Stick-Shaker and adjusted in- dependently from the other four switches 3.11.3 Power
30、Warning Flag- A warning device shall be incorporated in the indicator face as shown in Figure 1 or Figure 2 which will immediately indicate when d. c. power failure occurs. The black letters shall be legible under night lighting con- ditions. The lighting shall not be entirely dependent upon one lig
31、ht source. 3.11.5 Adjustment Range of Indices - Indices shall be adjustable in incre- ments not exceeding one-fourth of a dial division over the full length of the scale. Indices are not required to overlap one another or the fixed reference sector. 3.11.5 Damping - The indicator shall incorporate m
32、eans for damping the motion of the pointer. tween the angle of attack transmitter and the indicator pointer, the latter shall correct this error at an angular rate proportional to the error. rate shall give a time constant of O. 8 $:O. 2 second. For any error not exceeding 4.5 indicator dial divisio
33、ns be- The error divided by this 3. ll. 6 SlewingRate - For errors exceeding 10 indicator dial divisions be- tween the angle of attack transmitter and the indicator, the pointer shall rotate through twenty-dial divisions in not more than 3 seconds. 3.11.7 Warm-up Time - The time required for the ind
34、icator to warm-up prior to operation shall be kept to a minimum and shall not exceed one minute for standard conditions and twominutes under extreme conditions of - 5-1“ C. 3.11.8 Interchange abi 1 i t y of Reo r de red Indic ato r s - Inter c h ange abi li ty s h al 1 exist in indicator reorder bet
35、ween units and all repairable assemblies, subassemblies, and parts of the suppliers designated model as previously manufactured unless other- wise contractually specified in 6.2. New suppliers indicator model shall be inter- changeable with .my previous manufacture (as specified in 6.2) of designate
36、d indica- tors in fit, form. function and system interface and without selection or alteration. 3.12 Identification of Product - Identification of product shall be per MIL-1-81400 with the following nameplate markings: indicator, angle of attack Ms_ (add proper MS and dash number) Manufacturers name
37、 and supply code 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.i MIL-1-388566 bb m 77777Ob 0327782 m M IL- I- 1 8 85 6 B (AS) hlanufacturers part NO. Manufacturers Serial No. Contract/Order No. U. S. Property 4. QUALITY ASSURANCE PROVISIONS 4.1
38、Responsibility for Inspection - Unless otherwise specified in the contract orpurchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the ,supplier may use his own or any other faciliti
39、es 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 inspec- tions set forth in the specification where such inspections are deemed necessary to assure supplies and services conf
40、orm to prescribed requirements. 4.2 Classification of Inspections - Items covered by this specification shall be subjected to the following inspections to determine compliance with all appli- cable requirements. (a) Qualification Inspection - Tests performed on sample indica- tors submitted for appr
41、oval as a qualified product. (b) Quality Conformance inspection - Tests performed on indica- tors manufactured and submitted for acceptance. - - _ 4.3 Qualification Inspection - The qualification inspection of the indi- cator shall consist of all of the examinations and tests of this specification p
42、erformed in the order specified under the paragraph headed Test Methods and shall include the reliability test for the Reliability Qualification Phase. 4.3.1 Qualification Inspect ion Samples - Qualification inspection samples shall consist of a minimum of five indicators manufactured in accordance
43、with this Specification. The instruments submitted for qualification inspection shall have been previously subjected only to the individual and Sampling Plan A inspections. Three samples shall be forwarded with suppliers detailed quantitive test data,at the suppliers expense, to the laboratory desig
44、nated in the letter of Authorization (Section 6.4). The supplier shall conduct Reliability Qualification Phase Tests on the other samples at his plant under government surveilance. 1.3.1.1 Qualification Inspection Sample Identification - The qualification - inspection samples shall be plainly identi
45、fied by durable tags, securely attached, and marked with the following information: 9 (I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-1856B 66 7777706 0127783 6 = MIG I- 1 8 8 56 B (AS) Sample for Qualification Inspection Submitted by (Manuf
46、acturers name, Indicator, Angle of Attack, (add piopcr MS liiilllbcr) and p:ii.t number) for Qualification Inspection in accordancc with Specification MILI- 18856B(AS) under autlioriza- tion (reference letter authorizing tests), 4.4 uality Conformance Inspection - The supplier shall furnish all samp
47、les and shall 2 responsible for accomplishing all the inspections designated by the procuring activity. Quality conformance inspection shall be under the supervision of the government quality control representative. The supplier shall furnish test re- ports using I.IILT-18303 format showing detailed
48、 quantitative results for all tests re- quired by this specification signed by an authorized representative of the supplier or laboratory as applicable. Acceptance or approval of material during the course of manufacture shall in no case be construed as a guarantee of the acceptance of the fin- ishe
49、d product. Quality Conformance Inspection shall consist of the following tests: Individual Tests Sampling Plan A Tests Sampling Plan B Tests Reliability Assurance Tests Longevity Tests Maintainability Demonstration 4.4.1 Individual Tests- Each indicator submitted for acceptance shall be subjected to the Individual Test. These tests shall determine compliance with the
