ASTM_F_3011_-_13.pdf

Designation:F301113Standard Specification forPerformance of Angle of Attack System1This standard is issued under the fixed designation F3011;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This performance specification covers simple systemsthat provide angle-of-attack information to a pilot,aircraft,orother systems.NOTE1More complex AoA systems can be addressed in annexes inthe future.1.2 In this performance specification,functional operationand minimum performance requirements for an angle-of-attacksystem are established.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 RTCA Standard:2DO-160E Environmental Conditions and Test Proceduresfor Airborne Equipment3.Terminology3.1 Definitions:3.1.1 angle of attack,AoA,nacute angle between anaircrafts wing chord,wing mean chord,or other definedaircraft longitudinal axis,and the direction of the relative freestream wind.3.1.2 AoA system,ncollection of components used toprovideAoAinformation to the pilot,aircraft,or other systems.3.1.2.1 DiscussionThis may include simple or complexsystems,depending on the intended use.4.General Requirements4.1 Product IdentificationOne of the major components ofan AoA system,shall be labeled with the following informa-tion:4.1.1 Part Number,4.1.2 Serial Number,and4.1.3 Manufacturers Name.4.2 Operating ConditionsThe system manufacturer shallspecify the following limitations for proper function:4.2.1 The angular operational range of the system,4.2.2 Voltage operating range(min/max),if applicable,4.2.3 Electrical load specifications,if applicable,and4.2.4 Restrictions regarding the use and application ofdeicing fluids with the system,if applicable.4.3 Installation ManualThe manufacturer of the AoAsystem shall provide an installation manual that specifies thefollowing information so that an installer can determineappropriate use for an aircraft installation:4.3.1 A full description of the intended function of thesystem,4.3.2 An explicit compliance statement to this standard,Specification F3011,4.3.3 The operation limitations(including the items in 4.2,Operating Conditions),4.3.4 The environmental conditions(including items inSection 6,Environmental Requirements),4.3.5 Installation and calibration instructions required forsafe,accurate,and proper operation of all intended functions ofthe system,and4.3.6 Instructions for Continued AirworthinessThe manu-facturer of the AoA system shall provide continued airworthi-ness procedures necessary to ensure safe and accurate opera-tion(calibration,alignment to aircraft,maintenance,etc.).4.4 Users ManualThe manufacturer of the AoA systemshall provide a users manual that specifies:4.4.1 The functional operation of the system(includingitems in Section 5,Functional Requirements).4.5 It is permissible that the Installation and User Manual beone physical document so long as it clearly delineates the twosections.1This test method is under the jurisdiction of ASTM Committee F39 on AircraftSystems and is the direct responsibility of Subcommittee F39.03 on Design ofAvionics Systems.Current edition approved July 1,2013.Published July 2013.DOI:10.1520/F3011-13.2Available from RTCA,Inc.,1150 18th St.,NW,Suite 910,Washington,DC20036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Functional Requirements5.1 Basic OperationThe manufacturer shall clearlyspecify the functional characteristics of the system including:5.1.1 The resolution of the AOA indication over the speci-fied range.The resolution may vary over the range.The statedresolution need not be in degrees but may be in units consistentwith the indication(for example,percent of green band,number of LEDs,degrees,percent of full scale,etc.).5.1.2 The minimum accuracy of the AOA indication overthe specified range.The accuracy may vary over the range.Forthe purposes of this standard,fluctuating indication is permis-sible in the indicated AoA information so long as it does notcreate misleading indication.5.1.3 The range of sideslip angles for which specificationsabove are valid.5.1.4 These characteristics shall be verified by test of arepresentative system.This test need not consider the effects ofinstallation on an aircraft and may be done in a wind tunnel,onan aircraft,or other testing device.5.2 Stall IndicationIf the system indicates a stall,thesystem shall clearly and