§ Mr. Hayhoeasked the Secretary of State for Trade and Industry what are the latest estimates of the noise levels ex- 164W pected at take-off and landing for Concorde on entry into airline service; and how the figures compare with those for the latest versions of the VC10, Boeing 707, Boeing 747, DC8, DC 10, Trident, BAC 1–11 and Lockheed TriStar.
§ Mr. OnslowStudies into Concorde's noise are continuing. The manufacturers' estimate remains that Concorde's noise levels on certification will be 114 EPNdB on take-off and 115 EPNdB on landing. These compare with existing aircraft as follows:
EPNdB Take-off Landing VC10 110 115 Boeing 707–320C 114 120 DC8–61 115 116 Boeing 747–200B 108 109 Trident 3B 105 110 BAC 1–11 500 99 104 Lockheed 10–11 98 103 DC 10–10 96 102