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Understand the concepts used in our guides and calculators. Documented definitions, examples, and related reading.
6 concepts
Mass in running order describes the mass of a vehicle prepared for driving, including the items specified by the applicable definition. It is not necessarily the same as its unladen mass or a particular measured mass.
Reviewed 05.10.2026Maximum authorized mass is the greatest mass at which a vehicle may be driven under its authorization. Spanish vehicle documentation commonly uses the abbreviation MMA.
Reviewed 05.10.2026Maximum takeoff mass is the maximum mass limit authorized for an aircraft when beginning takeoff under the conditions of its certification. It is commonly shown as MTOM or MTOW in technical documentation.
Reviewed 05.10.2026An Anglo-American unit of power equal to approximately 745.7 watts under its mechanical definition.
Reviewed 05.10.2026A metric unit of power equal to approximately 735.5 watts.
Reviewed 05.10.2026A hybrid system in which the electric component assists the combustion engine without independently providing electric propulsion for the vehicle.
Reviewed 05.10.2026