Roy Chadwick, CBE, FRSA, FRAeS (30 April 1893 – 23 August 1947) was an aircraft design engineer for the Avro Company. Roy Chadwick - Wikipedia Crash of an Avro 689 Tudor 2 in Woodford: 4 killed | Bureau of Aircraft Accidents Archives Circumstances: Shortly after takeoff from Woodford Airport, while climbing to a height of some 60-80 feet, the four engine aircraft banked right, stalled and crashed in a wooded area. Four occupants were killed while two others were rescued. Crew: Bill Thorn, pilot, † David Wilson, copilot, † John Webster, flight engineer and radio operator, † Roy Chadwick, technician and designer, † Eddie Talbot, flight engineer, Stuart Davies, chief designer. Probable cause: Loss of control after takeoff caused by an incorrect assembly of the aileron control circuit on part of the Avro technicians.