Patent ID: 7195198

Claim:
A helicopter blade emergency detachment system for a helicopter, the helicopter blade emergency detachment system comprising: at least one signal initiator; a first portion of an ignition train for transferring a detonation signal from the at least one signal initiator to a transfer system, wherein the transfer system transfers the detonation signal between a stator assembly and a rotor assembly through a use of pistons and percussion primers; a second portion of the ignition train for further propagating the detonation signal from the transfer system to rotor blades on a helicopter; and explosive charges that are detonated, by the detonation signal from the second portion of the ignition train, to detach the rotor blades by a controlled explosion, wherein each of the rotor blades includes a blade sleeve around a blade flexbeam, and wherein the explosive charges are packed inside the blade sleeve and around the blade flexbeam.