Anti-theft device for aircraft

摘要

A pair of U-shaped or V-shaped collar members of hardened steel are adapted to be lockingly interengaged about a propeller blade of an aircraft propeller to provide an anti-theft device for the aircraft by providing an unbalanced propeller condition in response to starting the aircraft engine. A flag of resilient material depends from the device to alert unauthorized personnel of the latter and to remind authorized personnel to remove the device before starting the aircraft engine.