ASTM F3239-22a

Standard Specification for Aircraft Electric Propulsion Systems

SCOPE
1.1 This specification addresses airworthiness requirements for the design and installation of electric propulsion systems for aeroplanes. Hybrid-electric propulsion systems are addressed implicitly unless explicitly stated otherwise. This specification was written with the focus on electric propulsion systems with conventional system layout, propulsion characteristics, and operation. The content may be more broadly applicable; it is the responsibility of the applicant to substantiate broader applicability as a specific means of compliance.  
1.2 An applicant intending to propose this information as Means of Compliance for a design approval must seek guidance from their respective oversight authority (for example, published guidance from applicable CAAs) concerning the acceptable use and application thereof. For information on which oversight authorities have accepted this standard (in whole or in part) as an acceptable Means of Compliance to their regulatory requirements (hereinafter “the Rules”), refer to the ASTM Committee F44 web page (www.astm.org/COMMITTEE/F44.htm). Annex A1 maps the Means of Compliance described in this specification to EASA CS-23, amendment 5, or later, and FAA 14 CFR Part 23, amendment 64, or later.  
1.3 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.  
1.4 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-2022
• ICS: 49.050 - Aerospace engines and propulsion systems
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: F44 - General Aviation Aircraft
• Drafting Committee: F44.40 - Powerplant

Relations

• Refers: ASTM F3062/F3062M-20 - Standard Specification for Aircraft Powerplant Installation
• Effective Date: 01-Jun-2020

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: F3239 −22a
Standard Specification for
1
Aircraft Electric Propulsion Systems
This standard is issued under the fixed designation F3239; 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 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification addresses airworthiness requirements
F3060 Terminology for Aircraft
for the design and installation of electric propulsion systems
F3061/F3061M Specification for Systems and Equipment in
for aeroplanes. Hybrid-electric propulsion systems are ad-
Aircraft
dressed implicitly unless explicitly stated otherwise. This
F3062/F3062M Specification forAircraft Powerplant Instal-
specification was written with the focus on electric propulsion
lation
systems with conventional system layout, propulsion
F3063/F3063M Specification for Aircraft Fuel Storage and
characteristics, and operation. The content may be more
Delivery
broadly applicable; it is the responsibility of the applicant to
F3064/F3064M Specification for Aircraft Powerplant
substantiate broader applicability as a specific means of com-
Control, Operation, and Indication
pliance.
F3065/F3065M Specification for Aircraft Propeller System
1.2 An applicant intending to propose this information as
Installation
Means of Compliance for a design approval must seek guid-
F3066/F3066M Specification forAircraft Powerplant Instal-
ance from their respective oversight authority (for example,
lation Hazard Mitigation
published guidance from applicable CAAs) concerning the
F3114/F3114M Specification for Structures
acceptable use and application thereof. For information on
F3116/F3116M Specification for Design Loads and Condi-
which oversight authorities have accepted this standard (in
tions
whole or in part) as an acceptable Means of Compliance to
F3120/F3120M Specification for Ice Protection for General
their regulatory requirements (hereinafter “the Rules”), refer to
Aviation Aircraft
the ASTM Committee F44 web page (www.astm.org/
F3316/F3316M Specification for Electrical Systems forAir-
COMMITTEE/F44.htm). Annex A1 maps the Means of Com-
craft with Electric or Hybrid-Electric Propulsion
pliance described in this specification to EASACS-23, amend- F3338 Specification for Design of Electric Engines for
ment 5, or later, and FAA 14 CFR Part 23, amendment 64, or General Aviation Aircraft
3
later.
2.2 EASA Standard:
CS-23 Normal, Utility,Aerobatic and CommuterAeroplanes
1.3 This standard does not purport to address all of the
4
safety concerns, if any, associated with its use. It is the 2.3 FAA Standard and Advisory Circular:
14 CFR Part 23 Airworthiness Standards: Normal Category
responsibility of the user of this standard to establish appro-
Airplanes
priate safety, health, and environmental practices and deter-
AC 23-16 Powerplant Guide for Certification of Part 23
mine the applicability of regulatory limitations prior to use.
Airplanes
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
3.1 The following is a selection of relevant terms. See
Development of International Standards, Guides and Recom-
Terminology F3060 for more definitions and abbreviations.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
1
ThisspecificationisunderthejurisdictionofASTMCommitteeF44onGeneral Standards volume information, refer to the standard’s Document Summary page on
Aviation Aircraft and is the direct responsibility of Subcommittee F44.40 on the ASTM website.
3
Powerplant. Available from European Union Aviation Safety Agency (EASA), Konrad-
Current edition approved Sept. 1, 2022. Published September 2022. Originally Adenauer-Ufer 3, D-50668 Cologne, Germany, https://www.easa.europa.eu.
4
approved in 2018. Last previous edition approved in 2022 as F3239–22. DOI: Available from Federal Aviation Administration (FAA), 800 Independence
10.1520/F3239-22A. Ave., SW, Washington, DC 20591, http://www.faa.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F3239 − 22a
3.2 Definitions: 5.1.3 The combined usable energy capacity of al
...

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: F3239 − 22 F3239 − 22a
Standard Specification for
1
Aircraft Electric Propulsion Systems
This standard is issued under the fixed designation F3239; 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 specification addresses airworthiness requirements for the design and installation of electric propulsion systems for
aeroplanes. Hybrid-electric propulsion systems are addressed implicitly unless explicitly stated otherwise. This specification was
written with the focus on electric propulsion systems with conventional system layout, propulsion characteristics, and operation.
The content may be more broadly applicable; it is the responsibility of the applicant to substantiate broader applicability as a
specific means of compliance.
1.2 An applicant intending to propose this information as Means of Compliance for a design approval must seek guidance from
their respective oversight authority (for example, published guidance from applicable CAAs) concerning the acceptable use and
application thereof. For information on which oversight authorities have accepted this standard (in whole or in part) as an
acceptable Means of Compliance to their regulatory requirements (hereinafter “the Rules”), refer to the ASTM Committee F44 web
page (www.astm.org/COMMITTEE/F44.htm). Annex A1 maps the Means of Compliance described in this specification to EASA
CS-23, amendment 5, or later, and FAA 14 CFR Part 23, amendment 64, or later.
1.3 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.
1.4 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
2.1 ASTM Standards:
F3060 Terminology for Aircraft
F3061/F3061M Specification for Systems and Equipment in Aircraft
F3062/F3062M Specification for Aircraft Powerplant Installation
F3063/F3063M Specification for Aircraft Fuel Storage and Delivery
F3064/F3064M Specification for Aircraft Powerplant Control, Operation, and Indication
F3065/F3065M Specification for Aircraft Propeller System Installation
F3066/F3066M Specification for Aircraft Powerplant Installation Hazard Mitigation
F3114/F3114M Specification for Structures
F3116/F3116M Specification for Design Loads and Conditions
F3120/F3120M Specification for Ice Protection for General Aviation Aircraft
1
This specification is under the jurisdiction of ASTM Committee F44 on General Aviation Aircraft and is the direct responsibility of Subcommittee F44.40 on Powerplant.
Current edition approved April 1, 2022Sept. 1, 2022. Published April 2022September 2022. Originally approved in 2018. Last previous edition approved in 20192022 as
F3239–19.–22. DOI: 10.1520/F3239-22.10.1520/F3239-22A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F3239 − 22a
F3316/F3316M Specification for Electrical Systems for Aircraft with Electric or Hybrid-Electric Propulsion
F3338 Specification for Design of Electric Engines for General Aviation Aircraft
3
2.2 EASA Standard:
CS-23 Normal, Utility, Aerobatic and Commuter Aeroplanes
4
2.3 FAA Standard and Advisory Circular:
14 CFR Part 23 Airworthiness Standards: Normal Category Airplanes
AC 23-16 Powerplant Guide for Certification of Part 23 Airplanes
3. Terminology
3.1 The following is a selection of relevant terms. See Terminology F3060 for more definitions and abbreviations.
3.2 Definitions:
3.2.1 capacity, n—total amount between minimum and maximum condition (for example, empty and full).
3.2.2 electric engine, n—a type of aircraft
...