§ Mr. Hayhoeasked the Secretary of State for Industry what are the latest estimates of the noise levels expected at take-off and landing for Concorde; and 396W how the figures compare with those for the latest versions of VC10, Boeing 707, Boeing 747, DC8, DC10, Trident, BAC 1–11 and TriStar.
§ Mr. MeacherThe manufacturers' latest estimate is that Concorde's noise levels on certification at the increased weight of 400,000 Ib. now proposed will be 118 EPNdB on take-off and 115 EPNdB on landing. These compare with existing aircraft as follows:
EPNdB Take-off Landing VC10 … 110 112 Boeing 707–320C … 114 120 DC8–61 … 115 116 Boeing 747–200 B/F … 108 107 Trident 3B … l06 110 BAC 1–11500 … 95 104 Lockheed 10–11 … 97 103 DC 10–30 … 104 107