 It was built by Manufacture Belge De Lampes Et De Materiel Electronique SA (MBLE) of Belgium.Epervier prototypes were propeller-driven, but the production Epervier UAV, the "X.5" model, was fitted with a Rover TJ125 turbojet with 510 N (52 kgf / 114 lbf) thrust.It was launched by a RATO booster and recovered by parachute.