ARINC 404A:1974
ARINC 404A:1974 Air Transport Equipment Cases And Racking Provides a system of modularized equipment dimensions plus methods of attachment to mating mounting for avionic equipment designers usage.
Table of Contents
CHAPTER1GENERALCONSIDERATIONS1.0GeneralConsiderations
1.1PurposeandUseofthisSpecification
1.2OriginoftheATRUnitCaseSizeand
Mounting
1.3ARINCStandardCaseDesignations
1.4IndexCoding
CHAPTER2ATRSYSTEMMECHANICALDESIGN
2.0ATRSystemMechanicalDesign
2.1BoxOutlineDimensions
2.1.1ProjectionsontheFront
2.1.2ProjectionsonOtherFacesofEquipment
2.2WeightandCenterofGravityLimits
2.3Box/RackMountingSystems
2.3.1Hold-Down,TypeA
2.3.2Hold-Down,TypeB
2.3.3Hold-Down,TypeC
2.4RearHold-Down,(Rack)
2.5ConnectorLocation/Relationship
2.5.1MIL-C-81659ConnectorUsage
2.6IndexingPinUse
2.7DeflectionofBox/Rack
CHAPTER3ELECTRICALCONNECTORUSAGE
3.0ElectricalConnectorUsage
3.1ConnectorSelection
3.2ConnectorConfigurations
3.3ConnectorIndexPinCoding
CHAPTER4STANDARDIZEDSPACINGOFADJACENTEQUIPMENT
UNITS
4.0StandardizedSpacingofAdjacentEquipment
Units
CHAPTER5EQUIPMENTCOOLINGANDDESIGN
5.0EquipmentCoolingandDesign
5.1CoolingInterface
5.1.1TypesofEquipmentCooling
5.1.1.1Type"A"Cooling(Flow-Through)
5.1.1.2Type"B"Cooling(NaturalConvection)
5.1.2StandardAirFlowRate
5.1.3PressureDrop
5.1.4MechanicalInterface
5.1.5ThermalInterface
5.2DesignGuidanceandRecommendedPractices
forThermalManagement
5.2.1GuidanceforEquipmentDesigners
5.2.1.1EquipmentDesignEnvironmentTemperatures
5.2.1.2Type'A"CoolingSystemDesignStandards
5.2.1.3EquipmentThermalManagementAppraisal
5.2.1.4InstallationInterfaceDesignData
5.2.2GuidanceforAircraftDesigners
5.2.2.1AircraftCoolingSystemDesign
5.2.2.2.GroundOperation
5.2.2.3FlightOperation
5.2.2.4EquipmentCompartmentThermalControl
5.2.2.5IndicationofAirflow
5.2.2.6SupplementalCooling
5.2.2.7Contamination
5.2.2.8Maintainability
5.2.2.9DesignData
5.2.3GuidanceforAircraftOperators
5.2.4EquipmentOutlineDrawingData
CHAPTER6ELECTRICALGUIDANCEFOREQUIPMENTCASEAND
CHASSISGROUND
6.0ElectricalGuidanceforEquipmentCaseand
ChassisGround
6.1EquipmentPerformance
6.2EquipmentProtection
6.3PersonnelProtection
6.4SelectionofHardware
6.5ElectricalBondingandGroundDesign
Consideration
ATTACHMENT1STANDARDATRCASEDIMENSIONS
ATT-1-Fig.1BasicDimensionsofStandardATRCases
ATT-1-Fig.2OptionalProjectionsonFront,Bottom,Top
andSides
ATT-1-Fig.3OptionalFrontFaceForwardProjections
ATT-1-Fig.4OptionalProjectionsonRearofCase
ATT-1-Fig.5OutlineofStandardCasetoWhichAll
OptionalProjectionsHaveBeenAdded
ATT-1-Fig.6ATRSizeDimensions
ATT-1-Fig.7TypicalUnitofIrregularShapeConforming
toARINC404A
ATT-1-Fig.8UnitDeflectionCriteria
ATTACHMENT2HOOKDETAILSANDINSTALLATION
ATTACHMENT3THUMBSCREWDETAILSANDINSTALLATIONS
ATTACHMENT4LEVERLATCHHANDLEINSTALLATION-TYPE"B"
HOLD-DOWN
ATTACHMENT5ADJUSTABLECOMPENSATINGKEEPERINSTALLATION
ATTACHMENT6BASICDIMENSIONSOFINSERTER/EXTRACTOR
ATTACHMENT7CONNECTORLOCATIONS
ATT-7-Fig.1ConnectorLocations
ATT-7-Fig.2ConnectorLocations
ATT-7-Fig.3TableI
ATT-7-Fig.4Notes
ATTACHMENT8SPRINGLOADEDHOLD-DOWNS
ATT-8-Fig.1DetailofPin1/4ATRBoxesOnly
ATT-8-Fig.2ClearanceHolesforRearHold-DownPins
ATTACHMENT9UNITCOOLINGAIROPENINGS
ATTACHMENT10WEIGHTANDCENTEROFGRAVITYLIMITS
ATTACHMENT11STANDARDATRTRAYANDSEALDIMENSIONS
ATT-11-Fig.1Top,SideandFrontViews
ATT-11-Fig.2CrossSectionandDimensions
ATT-11-Fig.3GeneralNotesforATT-11
ATT-11-Fig.4TrayDeflectionCriteria
ATTACHMENT12STANDARDSPACINGOFADJACENTEQUIPMENTUNITS
(FRONTVIEW)
ATTACHMENT13CONNECTORENGAGINGPOSITIONMIL-C-81659
ATTACHMENT14MIL-C-81659CONNECTORCONFIGURATIONS
ATT-14-Fig.1Notes
ATTACHMENT15INDEXPINCODING
ATTACHMENT16CRITERIAFORCONNECTORSELECTION
ATTACHMENT17PROCEDURESFORAPPRAISALOFEQUIPMENT
COOLING
ATT-17.1PurposeofThisAttachment
ATT-17.2AppraisalSetup
ATT-17.3Instrumentation
ATT-17.3.1InstrumentationMethods
ATT-17.3.2Instrumentation
ATT-17.3.3SelectionofInstrumentedParts
ATT-17.3.4EquipmentFunctionalMeasurements
ATT-17.4UnitHeatDissipationAppraisal
ATT-17.5EquipmentAppraisalProcedure
ATT-17.5.1TypeAClassification(Flow-Through)Unit
TestConfiguration
ATT-17.5.2TypeBClassification(NaturalConvection)
UnitTestConfiguration
ATT-17.5.3AppraisalProcedure
ATT-17.5.3.1ThermalAppraisal
ATT-17.5.3.2PressureDropAppraisal
ATT-17-Fig.1ARINCStandardTestChamberSchematic
Type"A"(DrawThrough)Configuration
ATT-17-Fig.2TestEquipmentConfigurationand
InstrumentationLocationDimensions
APPENDIX1RE-DEFINITIONOFTHEACRONYM"ATRRACKING"
TOMEAN"AUSTINTRUMBULLRADIORACKING"
APPENDIX2ELECTRICALBONDINGPRACTICES
APPENDIX3CHRONOLOGYOFTHEARINCRACKINGSYSTEM
APPENDIX4HISTORICALCHRONOLOGYOFARINCCONNECTORS
APPENDIX5EXCERPTSFROMMIL-C-81659AANDRELATED
DOCUMENTS
APPENDIX6USAGEOFDPADPDCONNECTORS
APPENDIX7ELFINMODULES
APPENDIX8KNOWNSOURCESOF404AHARDWARE
APPENDIX9INSTALLATIONDELIBERATIONCHARTS
APPENDIX10DESIGNGUIDANCEFORAVIONICSCOOLING
APPENDIX11EQUIPMENT/AIRCRAFTINTERFACEDATA
APPENDIX12TRAYANDBACKPLATEDEFLECTIONSTUDY
APPENDIX13NICTHERMALMANAGEMENTSUBCOMMITTEEREPORT
APPENDIX14POSSIBLEFUTUREADDITIONSTOMIL-C-81659AND
3157
APPENDIX15COMMENTARYONUSEOFMIL-C-81659ANDRELATED
DOCUMENTS
APPENDIX16SOMEARINCSTAFFTHOUGHTSONCOOLING
PROBLEMSINTHEREALWORLDOFCOMMERCIAL
AVIONICS
APPENDIX17CHRONOLOGYANDBIBLIOGRAPHYOFTHEAEEC
ARINCPROJECT404A