mrodent,
You must be daft, plus you just registered today so your statements are worth nothing.
Your statement regarding airframe noise proves you know little of what goes into the noise signature of modern aircraft.
With the exception of a few(747, A300, DC-10), airframe noise is so buried in the engine noise that you will never hear it and never on takeoff. Only on some very lightweight approaches will you hear the airframe noise. What really gets you is when the approach weight is so low that the power required drops the aircraft engines into the bleed schedule. A lot of the large aircraft approaching Heathrow are coming from a VERY long distance and are way down from their maximum approach weight and end up in the bleed schedule(
). When they show you a noise footprint it will not be taking that scenario into account.
I Better shut up or the greeners will be up at arms.
As to your comments about Heathrow not affecting the economy of London??? Your just plain stupid to believe that.
ps. exeng-airframe noise will not get that much better in the future with present day technology. We understand it much better, but you really can't reduce it much more than we presently have.
