Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft

Full Title

Rotorcraft; Rotors peculiar thereto > Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft

Classification Context

Section:

PERFORMING OPERATIONS; TRANSPORTING

Class:

AIRCRAFT; AVIATION; COSMONAUTICS

Subclass:

AEROPLANES; HELICOPTERS

Child Classifications

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• B64C 27/24 with rotor blades fixed in flight to act as lifting surfaces
• B64C 27/26 characterised by provision of fixed wings
• B64C 27/28 with forward-propulsion propellers pivotable to act as lifting rotors
• B64C 27/3 with provision for reducing drag of inoperative rotor