EQUIPMENT FOR FITTING IN OR TO AIRCRAFT

**Definition:** This place covers:

**Glossary:** - hybrid: power plants or aircraft having two or more different sources of motive power which may be used together or alternately - hybrid electric: power plants or aircraft having electric motors and combustion engines driving the ultimate propulsive elements, e.g. propellers. Three types of hybrid electric aircraft or propulsion plants are identified according to the arrangement of the prime movers: series, parallel and series-parallel. - hybrid electric; series type: comprises a combustion engine driving an electric generator which powers electric propulsion motors - hybrid electric; parallel type: comprises a combustion engine and an electric motor for mutual or common propulsion of the ultimate propulsive elements - hybrid electric; series-parallel type: comprises power-split devices allowing the power path from the combustion engine to the ultimate propulsive element to be either fully mechanical, fully electric as in a series type or a combination of the two