Aircraft rotor protection

Abstract

Embodiments of the disclosure are directed to a convertible rotor aircraft CRA able to convert between airplane and helicopter flight modes during flight, comprising a tillable proprotor assembly TPA comprising a proprotor. Optionally, the CRA comprises a flight control module FCM configured to control the TPA to reverse direction of thrust generated by the proprotor relative to the TPA when the TPA transitions between a first orientation for helicopter flight and a second orientation for airplane flight. Optionally, the CRA comprises a deployable guard for the proprotors, configured to have a stowed state and a deployed state, wherein: the guard in the deployed state is controlled to be configured as a partially air-permeable barrier.

Dependencies are inferred from the claim text.