 The majority of powered systems, such as the flight controls, primarily harnessed Hydraulic power in the form of a Dowty-built high-pressure system; this was driven by the aircraft's turbojet engine and supplemented by accumulators for emergency operation of the undercarriage, air brakes and flaps.A second backup system is provided via a pneumatic system, powering the wheel brakes as well as undercarriage deployment and jettisoning the canopy.Bleed air drawn from the engine provided cockpit pressurization and air conditioning for pilot comfort.