Abstract: An automatic activation device for a parachute has a pressure input for inputting a pressure value and is provided for operating in selectable working configurations according to which a reference pressure is determined either on the basis of the input pressure value or on the basis of a QNH value. Preferably the device can also operate in another selectable working configuration, where a preset time and a reference fall down speed are used.

Abstract: The present invention is to improve the mechanical characteristics of a pyrotechnical parachute line cutting device. By enforcing the mechanical traction on the electrical connection wire by Kevlar reinforcement cords. The flexible electrical wire will be connected straight to the propellant detonator to avoid wire connections and fix the detonator trigger straight on the flexible wire. The reefing line will be cut by the blade but also, to secure the cutting action, be melt in the head of the cutter blade after explosion due to the use of special knife material size and an adapted pyrotechnical charge.