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  • BSI Flex 1903 v2:2024-06 community preview

    This is an interactive version 2 of BSI Flex 1903. The aim of the standard is to create a lexicon of standard terms and acronyms used in this sector. Please note, content is still undergoing internal review and there may be minor changes at full publication.

    We welcome your engagement and comments on this version to help inform the development of the standard. We would also welcome general feedback including what terms could be considered for future versions and these can be made through our dedicated feedback page .

lift-cruise aircraft



  • Definition

    VTOL-capable aircraft (VCA) (3.1.143) which depends, principally, on engine-driven rotors fixed to a substantially vertical axis for lift during take-off, landing and low-speed flight regimes, and on nonrotating aerofoil(s) for lift during high-speed flight



    Previous Version: 1.0 Release date: September 2023 

    powered lifted aircraft

    heavier-than-air aircraft capable of vertical take-off, vertical landing, and low-speed flight, which depends principally on engine-driven lift devices or engine thrust for the lift during these flight regimes and on non-rotating aerofoil(s) for lift during horizontal flight.

    NOTE: in addition to conventional phase of flight descriptions (e.g. take-off, climb, cruise, etc.), powered lift aircraft typically have an additional phase of flight, referred to as the transition phase, during which the primary means of generating lift transitions to/from the non-rotating aerofoils Also referred to as hybrid lift aircraft

    [SOURCE: ICAO Annex 1 to the Convention on International Civil Aviation, Personnel Licensing, 14th edition, July 2022] [19]

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