ASTM F 3768 : 2025

1.1This specification covers the Instrument Flight Rules (IFR) flight into Instrument Meteorological Conditions (IMC) requirements of the aircraft and is applicable to the design of a light sport aircraft.

1.2This specification is intended to apply to aircraft that additionally meet the requirements for light sport aircraft to be flown at night (Specification F2245, Annex A2).

1.3This specification shall apply to fixed wing aircraft using a combustion engine.

1.4Units—The values given in this standard are in SI units and are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound (or other) units that are provided for information only and are not considered standard. The values stated in each system may not be exact equivalents. Where it may not be clear, some equations provide the units of the result directly following the equation.

1.5This 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.

1.6This 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.