ASTM F3011-21
(Specification)Standard Specification for Performance of Angle of Attack System
Standard Specification for Performance of Angle of Attack System
ABSTRACT
This specification establishes functional operation and minimum performance requirements for simple systems that provide angle-of-attack information to a pilot, aircraft, or other systems. Functional requirements cover basic operation, stall indication, startup of electronically driven systems, accessibility of controls, and software while environmental requirements include icing, deicing fluids, emissions of RF energy, electrical power input, and power input abnormal surge voltage.
SCOPE
1.1 This performance specification covers simple systems that provide angle-of-attack information to a pilot, aircraft, or other systems.
Note 1: More complex AoA systems can be addressed in annexes in the future.
1.2 In this performance specification, functional operation and minimum performance requirements for an angle-of-attack system are established.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 31-Aug-2021
- Technical Committee
- F39 - Aircraft Systems
- Drafting Committee
- F39.03 - Design of Avionics Systems
Overview
ASTM F3011-21: Standard Specification for Performance of Angle of Attack System provides comprehensive requirements for systems that deliver angle-of-attack (AoA) information to pilots, aircraft, or other aviation systems. This international standard, developed by ASTM, specifies the minimum performance, operational, and environmental requirements to ensure safety, accuracy, and reliability of simple angle-of-attack systems in aviation applications.
By standardizing the performance and functional attributes of AoA systems, ASTM F3011-21 helps ensure critical flight information is delivered effectively, supporting safer and more informed flight operations.
Key Topics
- System Identification:
- Every AoA system must be labeled with its part number, serial number, and manufacturer’s name.
- Operational & Functional Requirements:
- Minimum performance includes clear AoA indication resolution and accuracy over a specified range.
- The system must provide intuitive stall warning features through multiple attention-getting cues (e.g., visual, aural).
- Startup performance for electronically driven systems must meet requirements within 3 minutes of power application, or clearly indicate when initialization is incomplete.
- User Interfaces & Controls:
- Adjustments for calibration and setup must not be accessible from the primary user interface, reducing inadvertent changes during operation.
- Software operation must be clearly documented, with configuration and revision level easily accessible.
- Documentation:
- Manufacturers are required to provide comprehensive installation and user manuals, including operation limitations, calibration, continued airworthiness procedures, and explicit statements of compliance with ASTM F3011-21.
- Environmental Considerations:
- Systems must demonstrate reliability under tested ranges of temperature, humidity, altitude, airspeed, and precipitation-ensuring operational integrity in diverse flight conditions.
- Resistance to icing, deicing fluids, and RF emissions interference is mandatory.
- Systems drawing electrical power must withstand specified surge voltages and function throughout defined voltage ranges.
Applications
The ASTM F3011-21 standard is vital for:
- Aircraft Manufacturers: Ensures reliable and standardized integration of AoA systems during aircraft design and production.
- Aftermarket Avionics Suppliers: Guides development and certification of retrofit AoA systems for existing aircraft fleets.
- Maintenance Organizations: Provides installation, calibration, and maintenance protocols to uphold airworthiness and safety.
- Pilots and Operators: Enhances situational awareness with standardized AoA indicators and clear stall warnings, reducing risk during critical flight phases.
By adhering to this standard, aviation stakeholders support safer operations, mitigate the risk of accidents related to stalled flight conditions, and maintain compliance with global best practices in avionics and aircraft systems.
Related Standards
For comprehensive angling of attack system performance and environmental testing, ASTM F3011-21 references:
- RTCA DO-160G (or later versions): Specifies environmental conditions and test procedures for airborne equipment, including requirements for RF emissions and environmental resilience.
- Additional future annexes to ASTM F3011 may address complex AoA system requirements, further supporting the evolving needs of modern aviation.
Keywords: ASTM F3011-21, angle-of-attack system, AoA, aircraft systems, avionics, stall warning, performance specification, aviation safety, environmental requirements, RTCA DO-160G.
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Frequently Asked Questions
ASTM F3011-21 is a technical specification published by ASTM International. Its full title is "Standard Specification for Performance of Angle of Attack System". This standard covers: ABSTRACT This specification establishes functional operation and minimum performance requirements for simple systems that provide angle-of-attack information to a pilot, aircraft, or other systems. Functional requirements cover basic operation, stall indication, startup of electronically driven systems, accessibility of controls, and software while environmental requirements include icing, deicing fluids, emissions of RF energy, electrical power input, and power input abnormal surge voltage. SCOPE 1.1 This performance specification covers simple systems that provide angle-of-attack information to a pilot, aircraft, or other systems. Note 1: More complex AoA systems can be addressed in annexes in the future. 1.2 In this performance specification, functional operation and minimum performance requirements for an angle-of-attack system are established. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ABSTRACT This specification establishes functional operation and minimum performance requirements for simple systems that provide angle-of-attack information to a pilot, aircraft, or other systems. Functional requirements cover basic operation, stall indication, startup of electronically driven systems, accessibility of controls, and software while environmental requirements include icing, deicing fluids, emissions of RF energy, electrical power input, and power input abnormal surge voltage. SCOPE 1.1 This performance specification covers simple systems that provide angle-of-attack information to a pilot, aircraft, or other systems. Note 1: More complex AoA systems can be addressed in annexes in the future. 1.2 In this performance specification, functional operation and minimum performance requirements for an angle-of-attack system are established. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM F3011-21 is classified under the following ICS (International Classification for Standards) categories: 49.090 - On-board equipment and instruments; 95.020 - Military in general. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM F3011-21 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F3011 −21
Standard Specification for
Performance of Angle of Attack System
This standard is issued under the fixed designation F3011; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 AoA system, n—collection of components used to
provideAoAinformationtothepilot,aircraft,orothersystems.
1.1 This performance specification covers simple systems
3.1.2.1 Discussion—This may include simple or complex
that provide angle-of-attack information to a pilot, aircraft, or
systems, depending on the intended use.
other systems.
NOTE 1—More complex AoA systems can be addressed in annexes in
4. General Requirements
the future.
4.1 Product Identification—Oneofthemajorcomponentsof
1.2 In this performance specification, functional operation
an AoA system, shall be labeled with the following informa-
and minimum performance requirements for an angle-of-attack
tion:
system are established.
4.1.1 Part Number,
1.3 The values stated in SI units are to be regarded as
4.1.2 Serial Number, and
standard. No other units of measurement are included in this
4.1.3 Manufacturer’s Name.
standard.
4.2 Operating Conditions—The system manufacturer shall
1.4 This standard does not purport to address all of the
specify the following limitations for proper function:
safety concerns, if any, associated with its use. It is the
4.2.1 The angular operational range of the system,
responsibility of the user of this standard to establish appro-
4.2.2 Voltage operating range (min/max), if applicable,
priate safety, health, and environmental practices and deter-
4.2.3 Electrical load specifications, if applicable, and
mine the applicability of regulatory limitations prior to use.
4.2.4 Restrictions regarding the use and application of
1.5 This international standard was developed in accor-
deicing fluids with the system, if applicable.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.3 Installation Manual—The manufacturer of the AoA
Development of International Standards, Guides and Recom- system shall provide an installation manual that specifies the
mendations issued by the World Trade Organization Technical
following information so that an installer can determine
Barriers to Trade (TBT) Committee.
appropriate use for an aircraft installation:
4.3.1 A full description of the intended function of the
2. Referenced Documents
system,
2.1 RTCA Standard:
4.3.2 An explicit compliance statement to this standard,
DO-160G (or later released version) Environmental Condi-
Specification F3011,
tions and Test Procedures for Airborne Equipment
4.3.3 The operation limitations (including the items in 4.2,
Operating Conditions),
3. Terminology
4.3.4 The environmental conditions (including items in
3.1 Definitions:
Section 6, Environmental Requirements),
3.1.1 angle of attack, AoA, n—acute angle between an
4.3.5 Installation and calibration instructions required for
aircraft’s wing chord, wing mean chord, or other defined
safe,accurate,andproperoperationofallintendedfunctionsof
aircraft longitudinal axis, and the direction of the relative free
the system, and
stream wind.
4.3.6 Instructions for Continued Airworthiness—The manu-
facturer of the AoA system shall provide continued airworthi-
This test method is under the jurisdiction ofASTM Committee F39 on Aircraft
ness procedures necessary to ensure safe and accurate opera-
Systems and is the direct responsibility of Subcommittee F39.03 on Design of
tion (calibration, alignment to aircraft, maintenance, etc.).
Avionics Systems.
Current edition approved Sept. 1, 2021. Published October 2021. Originally
4.4 User’s Manual—The manufacturer of the AoA system
approved in 2013. Last previous edition approved in 2013 as F3011-13. DOI:
shall provide a user’s manual that specifies:
10.1520/F3011-21.
2 4.4.1 The functional operation of the system (including
Available from RTCA, Inc., 1150 18th St., NW, Suite 910, Washington, DC
20036, https://www.rtca.org/. items in Section 5, Functional Requirements).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F3011 − 21
4.5 The operating instruction shall be a separate document 6.1.1 Operating Temperature Range—The temperature
or clearly stated section of the User’s Manual rather than part range that the system correctly functions and is not adversely
of the Installation Manual. affected at standard pressure.
6.1.2 Storage/Survival Temperature Range—The tempera-
5. Functional Requirements
ture range across which the system is exposed and not
5.1 Basic Operation—The manufacturer shall clearly
permanently damaged.
specify the functional characteristics of the system including:
6.1.3 Operating Humidity Range—The non-condensing hu-
5.1.1 The resolution of the AoA indication over the speci-
midity range at standard temperature and pressure that the
fied range. The resolution may vary over the range. The stated
system correctly functions, and is not adversely affected.
resolution need not be in degrees but may be in units consistent
6.1.4 Operating Altitude Range—
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F3011 − 13 F3011 − 21
Standard Specification for
Performance of Angle of Attack System
This standard is issued under the fixed designation F3011; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This performance specification covers simple systems that provide angle-of-attack information to a pilot, aircraft, or other
systems.
NOTE 1—More complex AoA systems can be addressed in annexes in the future.
1.2 In this performance specification, functional operation and minimum performance requirements for an angle-of-attack system
are established.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 RTCA Standard:
DO-160EDO-160G (or later released version) Environmental Conditions and Test Procedures for Airborne Equipment
3. Terminology
3.1 Definitions:
3.1.1 angle of attack, AoA, n—acute angle between an aircraft’s wing chord, wing mean chord, or other defined aircraft
longitudinal axis, and the direction of the relative free stream wind.
3.1.2 AoA system, n—collection of components used to provide AoA information to the pilot, aircraft, or other systems.
3.1.2.1 Discussion—
This may include simple or complex systems, depending on the intended use.
This test method is under the jurisdiction of ASTM Committee F39 on Aircraft Systems and is the direct responsibility of Subcommittee F39.03 on Design of Avionics
Systems.
Current edition approved July 1, 2013Sept. 1, 2021. Published July 2013October 2021. Originally approved in 2013. Last previous edition approved in 2013 as F3011-13.
DOI: 10.1520/F3011-13.10.1520/F3011-21.
Available from RTCA, Inc., 1150 18th St., NW, Suite 910, Washington, DC 20036.20036, https://www.rtca.org/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F3011 − 21
4. General Requirements
4.1 Product Identification—One of the major components of an AoA system, shall be labeled with the following information:
4.1.1 Part Number,
4.1.2 Serial Number, and
4.1.3 Manufacturer’s Name.
4.2 Operating Conditions—The system manufacturer shall specify 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, and
4.2.4 Restrictions regarding the use and application of deicing fluids with the system, if applicable.
4.3 Installation Manual—The manufacturer of the AoA system shall provide an installation manual that specifies the following
information so that an installer can determine appropriate use for an aircraft installation:
4.3.1 A full description of the intended function of the system,
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 in Section 6, Environmental Requirements),
4.3.5 Installation and calibration instructions required for safe, accurate, and proper operation of all intended functions of the
system, and
4.3.6 Instructions for Continued Airworthiness—The manufacturer of the AoA system shall provide continued airworthiness
procedures necessary to ensure safe and accurate operation (calibration, alignment to aircraft, maintenance, etc.).
4.4 User’s Manual—The manufacturer of the AoA system shall provide a user’s manual that specifies:
4.4.1 The functional operation of the system (including items in Section 5, Functional Requirements).
4.5 It is permissible that the Installation and User Manual be one physical document so long as it clearly delineates the two
sections.The operating instruction shall be a separate document or clearly stated section of the User’s Manual rather than part of
the Installation Manual.
5. Functional Requirements
5.1 Basic Operation—The manufacturer shall clearly specify the functional characteristics of the system including:
5.1.1 The resolution of the AOAAoA indication over the specified range. The resolution may vary over the range. The stated
resolution need not be in degrees but may be in units consistent with 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 AOAAoA indication over the specified range. The accuracy may vary over the range. For the
purposes of this standard,following accuracies should be used for the AoA range between the zero-lift angle of attack (α
Zero Lift
fluctuating indication is permissible in the indicated AoA information so long ), and the stall angle of attack (α as it does not
CL Max
create misleading
...
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