Helicopter Westland Whirlwind HAR.4 Serial wa 47 Register XJ431 XD800 used by Royal Air Force RAF. Built 1955. Aircraft history and location Aircraft History XD800 Royal Air Force Westland Whirlwind Ser.1, c/n WA47, ntu Royal Air Force as Whirlwind HAR.4, XD800 [duplicate Sabre 4 serial]. XJ431 Royal Air Force 1955-05-31 A Tanah Merah Accident ff: 31May55 del Royal Air Force as Whirlwind HAR.4, XJ431, 02Jun55 w/o . Send Updates Use APP to upload photo @ (optional) When Now? / / Send