§ Mr. Wrigglesworthasked the Secretary of State for Industry whether he will now publish the results of the Concorde noise measurements made at Casablanca; and if he will make a statement.
§ Mr. VarleyThe noise measurements at Casablanca, to which my right hon. Friend the Secretary of State for Trade referred in his statement of 13th October, were carried out in November and December 1974 during a series of flight demonstrations of the production Concorde 202. The measurements, using procedures specified in United States Federal Aviation Regulations Part 36, which are analogous to International Civil Aviation418W Organisation techniques contained in Annex 16 of the Chicago Convention, were made by the British Aircraft Corporation, Aerospatiale and the Service Technique de la Navigation Aérienne.
The report is now available, and shows that the trials resulted in readings of 119.5 EPNdB—effective perceived noise decibels—on take off 116.7 EPNdB on landing, and 112.2 EPNdB on sideline. These figures are comparable with those of the older narrow-bodied subsonic jets:
EPNdB Take off Landing Boeing 707–320C 114 120 DC8–61 115 116 A copy of the report has been placed in the Library.