Britain's Biggest Land Plane Crashes On Test Flight -- A general view of the crashed Avro Tudor II, which broke its back on its test flight. When Britain's biggest land plane, the Avro TUDOR II crashed at Woodford Airfield, Cheshire yesterday, Mr. Roy Chadwick, one of Britain's greatest air designed and three other men were killed. The plane had Just taken off for a test flight, it rose fifty feet and "crashed like a stone". Mr. Chadwick was the designer of the Lancaster bomber. August 24, 1947.