Noise
Interesting discussion. As I posted in another thread, the newer by-pass engines of today are very quiet, so whats the fuss about.
Some points : The CFIT manual published by Airbus recommends glide slopes angles of between 3 and 3.7 degrees for jet transport, that is a gradient of between 318 and 392 feet per NM. 2.8 is too flat.
4 degrees =424 ft/nm
5.5 degrees (LCY) = 582 ft/nm
8.9 degrees =950 f/nm
For 1000 ft/nm the gradient would be 9.4 degrees, NUTS !!
Remember the recommended max is 3.7 degrees, 392 ft/nm
Even with approach idle on new jets, the spool up time is 6 to 8 seconds.
The microwave landing system (MLS) never worked well in rain. The signals were bent and unreliable, that's why it is not used today.
Blame week politicians for allowing the building of houses too close to airports. Trouble with that lot is no training for the job. Just the soap box talk, then we vote them into power.