Helicopter Westland Sioux Serial wa423 Register XT511 used by Army Air Corps AAC (British Army). Built 1966. Aircraft history and location Aircraft History XT511 Army Air Corps 1967 A Lippitts Hill Trials Took part in Police use of Helicopter trials () wearing ARMY and Police marks, from Lippitts Hill. Sold to South Africa. Jun69-Feb70 asg 653Sq at airfield Camp, Netheravon, Wiltshire 653 Squadron Send Updates Use APP to upload photo @ (optional) When Now? / / Send