ASTM_F_2840_-_14.pdf

Designation:F284014Standard Practice forDesign and Manufacture of Electric Propulsion Units forLight Sport Aircraft1This standard is issued under the fixed designation F2840;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 practice covers minimum requirements for thedesign and manufacture of Electric Propulsion Units(EPU)forlight sport aircraft,VFR use.The EPU shall as a minimumconsist of the electric motor,associated controllers,discon-nects and wiring,an Energy Storage Device(ESD)such as abattery or capacitor,or both,and EPU monitoring gauges andmeters.Optional onboard charging devices,in-flight chargingdevices or other technology may be included.1.2 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 ASTM Standards:2F2245 Specification for Design and Performance of a LightSport AirplaneF2972 Specification for Light Sport Aircraft ManufacturersQuality Assurance System2.2 Other Standards:EASA CRI F-58 Lithium Battery Installations3SAE J2344 Guidelines for Electric Vehicle Safety43.Significance and Use3.1 This specification provides designers and manufacturersof electric propulsion for light sport aircraft design referencesand criteria to use in designing and manufacturing EPUs.3.2 Declaration of compliance is based on testing anddocumentation during the design,ground testing and flighttesting of the EPU by the manufacturer or under the manufac-turers guidance.3.3 Manufacturers of the EPUs are encouraged to reviewand incorporate appropriate standards and lessons learned fromground based systems as documented in SAE J2344 and EASACRI F-58(see Appendix X2).3.4 Electric aircraft may contain potentially hazardous levelof electrical voltage or current.It is important to protectpersons from exposure to this hazard.Under normal operatingconditions,adequate electrical isolation is achieved throughphysical separation means such as the use of insulated wire,enclosures,or other barriers to direct contact.There areconditions or events that can occur outside normal operationthat can cause this protection to be degraded.Some meansshould be provided to detect degraded isolation or ground fault.In addition,processes or hardware,or both,should be providedto allow for controlled access to the high voltage system formaintenance or repair.A number of alternative means may beused to achieve these electrical safety goals including auto-matic hazardous voltage disconnects,manual disconnects,interlock systems,special tools and grounding.The intention ofall these means is either to prevent inadvertent contact withhazardous voltages or to prevent damage or injury from theuncontrolled release of electric energy.Lightning strikes arenot addressed in this Standard Practice because LSA aircraftare limited to VMC flight only.4.Electric Propulsion Unit(EPU)Model Designation4.1 Electric Propulsion Parts ListA detailed parts list isrequired for each electric propulsion unit qualified in accor-dance with this specification.4.2 New Electric Propulsion Unit Model Designations:4.2.1 Each new EPU must be qualified in accordance withthis practice.4.2.2 Design or configuration changes that impact the in-stallation interface,performance,or operability of the EPUrequire a new EPU model designation.4.3 Design Changes of PartsEach design change of a partor component of an EPU model qualified to this specificationshall be evaluated to the requirements of this specification.1This practice is under the jurisdiction of ASTM Committee F37 on Light SportAircraft and is the direct responsibility of Subcommittee F37.20 on Airplane.Current edition approved Nov.1,2014.Published December 2014.Originallyapproved in 2011.Last previous edition approved in 2011 as F2840 11.DOI:10.1520/F2840-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from European Aviation Safety Agency(EASA),Postfach 10 12 53,D-50452 Koeln,Germany,http:/easa.europa.eu/home.php.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/www.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Data Requirements5.1 Retained DataThe following data and informationshall be retained on file at the manufacturers facility oralternative business entity for a minimum of 18 years afterproduction is discontinued.