System for driving a slat of an aircraft , comprising: - a first hinge support element of an aircraft wing structure , - a second hinge support element of the aircraft wing structure , - a first arm device , a second arm device and a third arm device , wherein the first arm device being rotatablely connected by an associated first connection junction to the first hinge support element , comprising a second connection junction being configured to be rotatablely connected to a rear portion of the slat , which remains rearward of a front portion during driving the slat , having a steady curved shape between the first connection junction and the second connection junction at least in a last third end section, where the first connection junction is located, and comprising a third connection junction arranged between the first and second connection junction , of the first arm device ; wherein the second arm device being linearly extendable, being rotatablely connected by an associated first connection junction to the second hinge support element , comprising a second connection junction being configured to be rotatablely connected to the front portion of the slat , and comprising a third connection junction arranged between the first and second connection junction , of the second arm device ; and wherein the third arm device being rotatablely connected by an associated first connection junction to the third connection junction of the first arm device , and characterised in that the third arm device is rotatablely connected by an associated second connection junction to the third connection junction of the second arm device . - a first hinge support element of an aircraft wing structure , - a second hinge support element of the aircraft wing structure , - a first arm device , a second arm device and a third arm device , wherein the first arm device being rotatablely connected by an associated first connection junction to the first hinge support element , comprising a second connection junction being configured to be rotatablely connected to a rear portion of the slat , which remains rearward of a front portion during driving the slat , having a steady curved shape between the first connection junction and the second connection junction at least in a last third end section, where the first connection junction is located, and comprising a third connection junction arranged between the first and second connection junction , of the first arm device ; wherein the second arm device being linearly extendable, being rotatablely connected by an associated first connection junction to the second hinge support element , comprising a second connection junction being configured to be rotatablely connected to the front portion of the slat , and comprising a third connection junction arranged between the first and second connection junction , of the second arm device ; and wherein the third arm device being rotatablely connected by an associated first connection junction to the third connection junction of the first arm device , and characterised in that the third arm device is rotatablely connected by an associated second connection junction to the third connection junction of the second arm device . <EOS>