1、E=Ecl”MIL-C-38286B(USAF)16 May 1990SUPERSEDINGMIL-C-38286A(USAF)15 DECEMBER 1977MILITARY SPECIFICATIONCOMPUTER, FLIGHT DIRECTORCPU-65/AThis specificationis approved for useby the Department of the Air Force and isavailablefor use”by all Departments andAgencies of the Department of Defense.1. Scope1.
2、1 Scope. This specificationcovers the requirements for one type of universalflight director computer, designated CPU-65/A.2. APPLICABLE DOCUMENTS2.1 Government Documents.2.1.1 Secifications,standards and handbooks. The following specifications,standards and handbook form a part of this document to t
3、he extent specifiedherein.Unless otherwise specified, the issues of these documents are those listed intheissue of the Department of Defense Index of Specificationsand Standards (DODISS)and supplement thereto, cited in the solicitation (see 6.2).%enef iclal comments (recommendations,additions, delet
4、ions) and any pertinent datawhich may be of use in improving this document should he addressed to: OklahomaCity Air Logistics Center/MMEOR,Tinker AFB, OK 73145-5990by using theStandardizationDocument IrnprOvernen Proposal (DD Form 1426) appearn at the end ofthis document or by letter.AMSC N/A FSC 66
5、10DISTRIBUTIONSTATEMENT X. Distribution authorized to U. S. Government agencies andprivate individuals or enterprises eligible to obtain export-controlledtechnicaldata in accordancewith regulations implementing 10 U.S.C. 140c. 11 April 1988.ControllingDoD Office iS OC-ALC/MMEOR,Tinker AFB, OK 73145-
6、5990.WARNING. This document contains technical data, whose export is restrictedby theArms Export Control Act (Title 22, U. S. C., Sec. 2751 et seq.) or Executive Order12470. Violations of these export laws are subiect to severe criminal penalties. -DESTRUCTIONNOTICE. For classified documents, follow
7、 the procedures in DoD5200.22-M, Industrial SecurityManual, Section 11-19 for DoD 5200.1-R, InformationSecurity Program Regulation, Chapter IX. For unclassified, limited documents,destroy by any method that will present disclosure of contents or reconstruction ofthe document.Provided by IHSNot for R
8、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38286B(USAF)SDec.ificationsFederalPPP-B-601PPP-B-636MilitaryMIL-P-116MIL-E-5400MIL-C-5541MIL-A-8625MIL-G-25597MIL-I-26689MIL-I-27193MIL-C-27205MIL-I-27619MIL-H-27848MIL-C-83488StandardsMilitaryMIL-STD-1OOMIL-STD-129MIL-S
9、TD-130MIL-STD-454LMIL-STD-461MIL-STD-462MIL-STD-704MIL-STD781MIL-STD-81OCMIL-STD-889MIL-STD-970MIL-STD-1686ABox, Wood, Cleated-PlywoodBox, Shipping, FiberboardPreservation,Method ofElectronic Equipment,Aircraft, General SpecificationForChemical Conversion Coatings On Aluminum And A11OYSAnodic Coatin
10、gs, For Aluminum AndAluminum AlloysGyroscope, Displacement,Roll And pitch,Type MD-1Indicator, Horizontal Situation AQU-2/AIndicator, Attitude ARU-2B/AControl Assembly, Gyroscopic, Attitude HeadingA/A24G-5AIndicator, Attitude ARU-11/AHorizontal Situation Indicator AQU-4/ACoating, Aluminum, Ion Vapor
11、DepositedEngineering Drawing PracticesMarking For ShipmentAnd StorageIdentificationMarking Of U. S. MilitaryPropertyStandard General Requirement ForElectronic EquipmentElectromagneticEmissionAndSusceptibilityRequirements For TheControl ElectromagneticInterferenceElectromagneticInterferenceCharacteri
12、stics,Measurement OfElectric Power, Aircraft,Characteristics,And Utilization OfReliability Testing For Engineering DevelopmentQualification,And ProductionEnvironmentalTest Methods And EngineeringGuidelinesDissimilar MetalsStandards And Specification,Order OfElectrostatic Discharge Control Program Fo
13、r The - “Protection Of Electronic Parts, Assemblies and2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38286(USAF)“Equipment(ExcludingElectrically InitiatedExplosiveDevices)DOD-STD-1866 Soldering Process, General (Non Electrical) (Metric)MIL-S
14、TD-2073-1 DoD Material Procedures For DevelopmentAndApplication Of Packaging RequirementsMilitary HandbookMIL-HDBK-781 Reliability Test Methods, Plans, and Environments ForEngineering Development, QualificationAnd Production(Unless otherwise indicated, copies of federal and military specification,St
15、andards, and drawings are available from the Naval Publicationsand Forms Center,(ATTN: NPODS), Bldg 4D, 700 Robbins Ave, Philaldelpt!ia,PA 19111-5094.)(Copies of MIL-STD-810C is available from Director, Naval Publications OK73145-5990.)2.2 Non-Government publications. The following document(s) form
16、a part of thisdocument to the extent specified herein. Unless otherwise specified, the issues ofthe documents which are DOD adopted are those listed in the issue of the DODISScited in the solicitation. Unless otherwise specified, the issues of the documentsnot listed in the DODISS are the issues of
17、the documents cited in the solicitation.American Society For Testing And Materiil(ASTM)ASTM D3951 Packaging, Commercial(Applicationfor copies should be addressed to: ASTM, 1916 Race St, PhiladelphiaPA19103.)(Non-Government standards and other publications are normally available from theorganizations
18、 that prepare or which distribute the documents. These documents alsomay be available in or through libraries or other informationalservices.)2.3 Order of precedence. In the event of a conflict between the test of thisdocument and the reference cited herein (except for related associated detailspeci
19、fications,specification sheets or MS standards), the text of this document - -take precedence. Nothing in this document however, supersedes applicable laws andregulations unless a specific exemption has been obtained.3. REQIJIREMENTS3.1 First Article. When specified, a sample shall be subjected to f
20、irst articleinspection (see 6.3) in accordance with 4.4.3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38286(USAF)3.2 Selection of Specificationsand Standards. Specificationsand standardsfornecessary commoditiesand services not specifiedherei
21、n shall be in accordancewithMIL-STD-970.3.3 MATERIALS3.3.1 Fungus-proofmaterials. Materials that are nutrients for fungi shall not beused where it is practicableto avoid them. Where used and not hermeticallysealed,they shall be treatedwith a fungicidal agent acceptable to the contractingactivity. Ho
22、wever, if they will be used in a hermetically sealed inclosure,fungicidal treatmentwill not be necessary.3.3.2 Nonmagnetic materials. Nonmagnetic materials shall be used for all partsexcept where magnetic materials are essential.3.3.3 Toxic and CorrosiveFumes. The materials, as installed in the comp
23、uter andunder the service conditions specified herein, shall not liberate deleteriousorcorrosive fumes. This shall include any fungicidal agents that are used.3.3.4 Nonferrous materials. Nonferrous materials shall be used for all partsexcept where ferrous materials are essential.a. Nonferrous materi
24、als containedwithin hermetically sealed enclosuresshallbe considered suitably protected against corrosion. Requirementsspecifiedfor fungicidal and corrosion protective treatment and anodizingof aluminumalloy parts shall not be applicable for parts within hermeticallysealedenclosures.3.3.5 Metals. Me
25、tals shall be corrosion-resistantor suitably treated to resistcorrosion from fuel, salt fog, or atmospheric conditions likely to be met in storageor normal service.3.3.6 Dissimilar metals. Unless suitable protected aEainst electrolyticcorrosion,dissimilarmetals shall not be used in intimate contactw
26、ith each other. Dissimilarmetals are defined in MIL-STD-889.3.3.7 protective treatment. When materials are used in the construction of thecomputer that are subject to deterioration when exposed to climatic andenvironmentalconditions likely to occur during service usage, they shall beprotected agains
27、t such deterioration in a manner that will in no way preventcompliancewith the performance requirements of this specification. The use of anyprotective coating that will crack, chip, or scale with age or extremesof climaticand environmentalconditions shall be avoided.3.4 Design and construction. The
28、 computer shall be designed to provide computedflight director signals to flight director indicators. The computer shall be sodesigned and constructed that no parts will work loose in service. It shall bebuilt to with-stand the strains, .fiars,vibrations, and other conditions incident to -shipping,
29、storage, installation, and service.3.4.1 Reliability. The computer shall have a mean-time-betweenfailures (MTBF) of600 hours when tested in accordance with MIL-STD-781D, Test Plan 11 crieria.3.4.2 Maintainability. The computer shall be so designed that overhaul, includingreplacementof worn parts, ad
30、justment, balance, and calibrationmay be accomplishedProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38286B(USAF)by instrument and electronic repairmen provideclwith simplified tools and equipment,trained in the repair of electronic and similar
31、 equipment.3.4.3 Hermetic sealing. The method of hermetic sealing and mounting of thecomponents in the sealed chamber of the case shall be such that the case can heunsealed and the complete assembly of components removed as a unit, replaced, andthe case resealed. This shall be accomplishedwithout th
32、e use of special tools andfixtures unless they are approved by the contracting activity. The case and seal(see 6.4.1) shall be designed to meet the pressure requirements specifiedherein.3.4.3.1 Filling medium. The filling medium shall be at least 90 percent pure, freeof dust particles, and shall con
33、tain no more thlan0.006 milligram of water vapor perliter (dewpoint-65”C) at the filling pressure. The fillingmedium shall be either100 percent helium or a mixture of 88 to 92 percent nitrogen and the remainderhelium. The absolute pressure of the filling medium in the case shall beapproximately 1 at
34、mosphere. Where practicable, the 100 percent helium fillingmedium shall be utilized.3.5 Performance. The computer shall be capable of satisfactoryoperationwhensubjected to the followingconditions:a. Temperatures - operating temperatures ranging from -54 to 71C and storagetemperatures ranging from -6
35、5 to +98C.b. Humidity -c. Altitude -(approximatelyd. Salt Fog -relative humidity up to 100 percent.pressures ranging from 30 inches Hg down to 0.315 inch Hg100,000feet).exposure to simulated salt sea atmosphere for 48 hours.e. Vibration - vibrationwith an applied double amplitude of 0.060 inchthroug
36、h the frequency range of 10 to 55 Hz and 30g input from 55 to 500 Hz.f.g“h.i.andj“k.Fungus - fungus growth as encountered in tropical climate.Dust (fine sand) - dust (fine sand) as encountered in desert areas.Rain - rainfall as encountered in any locale.Temperature Shock - alternate immersions in wa
37、ter5+ 4C for a total of 8 cycles without leakage.Acceleration - acceleration forces of 20g withoutExtreme voltage and frequency variation - appliedmaintained at 85 +4Cdamage.voltages of 105V at 320Hz and 125V at 480 Hz.1. External pressure - external pressure of 26.5 psia with no power applied.3.5.1
38、 Electromagnetic interference. The computer shall comply with therequirementsof MIL-STD-461A, Notice 3, for Class Al equipment for test-methodsCE03, CE04, CSO1, CS02, CS06, RE02, RS02 and RS03.3.5.2 Dielectric strength. There shall be no insulation break-downwhen 500V dc is5Provided by IHSNot for Re
39、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38286B(USAF)applied between isolated pins and between pins and the case for a period of 10seconds.3.5.3 Leakage. The initial maximum leak rate at a pressure differential ofapproximately 1 atmosphere shall not permit a los
40、s of more than 10 percent of thetotal filling medium after 1,000 hours.3.6 Part numbering of interchangeableparts. All parts having the samemanufacturers part number shall be functionallyand dimensionallyinterchangeable.The item identificationand part number requirementsof MIL-STD-1OO shall govern t
41、hemanufacturers part numbers and changes thereto.3.6.1 Drawings. All electronicparts shall be annotated on engineeringdrawings(DOD-STD-1OO)indicating their electrostatic discharge (ESD) sensitivityinaccordancewith MIL-STD-1686A (Full Scale Development) and qualified parts listdocumentation.3.7 Elect
42、ronic parts. Electronic parts and application thereof shall be inaccordance with MIL-E-5400. Parts that do not appear on approved lists shall not beused unless approved by the contracting activity. Electronic tubes shall not beused.3.7.1 Electronic Components. Requirement 64, MIL-STD-454L, shall be
43、invoked whenselecting electronic parts for development/production. The least ESD sensitiveparts shall be used that are identified on the qualified parts list for electroniccomponents.3.7.2 Other components. All other components in the electronic system shallconform to applicable specifications,where
44、 existent.3.8 Mechanical design. The”computer shall be composed of one module for eachflight mode listed in 3.10 plus any other components required to provide theoperation specified herein. Functionally related modes of simple form may becombined in one module if approved by the contracting activity
45、. Modern techniquesof miniaturizationand modular constructionshall be exploited to the greatestextent of possible without sacrificing ruggedness, reliability, and service life.Transistorizedcomponents shall be used throughout the computer.3.9 Case. The computer case shall be in accordance with figur
46、e 1 and shall behermetically sealed except for external adjustments which shall be gasket sealedunder a dust cover.3.9.1 Adjustment panel. An adjustment panel shall be located on the front of thecomputer case as shown on figure 1. The potentiometer adjustment specified in tableI and Drawing 64F1866
47、shall be located on this panel. Each potentiometershall beproperly number in accordancewith table I. The test points shown on Drawing64F1866 shall also be located on the adjustment panel to permit isolationoffailures within the computer. The test points shall also provide for shorting out -of variou
48、s circuits in the computer for test purposes. Prior to fabrication,the -design of the adjustment panel shall be approved by the contractingactivity.3.9.1.1 Test points. The test points shall be as follows:a. TJ1 - Shorts out direct roll when connected to TJ6 to allow for measurementof roll rates.6Pr
49、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38286B(1USAF)b. TJ2 - Shorts out radio displacementwhen connected to TJ6 to allow formeasurement of radio rates.c. TJ3 - When shorted to TJ6, vertical pointer flag comes into view.d. TJ4 - Shorts out course-zeroand rates when connected to TJ6 to permitmeasurement of course gain. Also, shorts out roll rates for measurementofroll displacement.e. TJ5
