|Quoting waly777 (Reply 9):|
A 5.5 degree slope is much too steep for any Jet, all the Jets at LCY have to be specially configured to fly an approach that steep. Most aircraft will start to gain speed if they are descending that steeply, not to mention the difficulties in changing flaring heights and the additional training costs as pilots would have to be retrained to fly into LHR.
I think introducing an 800 metre to 1000 metre displaced threshold (both LHR's runways are almost 4000 metres long) in addition to a 4.0 degree slope should achieve higher heights over the surrounding towns, thereby reducing noise and also not requiring any additional training for the pilots.
Yep, I fly it on a regular basis to MRS
, and a 4° slope is a far more doable thing.
But even at 4°, as someone said, the aircraft must be configured sooner, with a certain amount of drag added before intercepting the G/S. So such a configuration at LHR
would add ATC and capacity problem. LHR
doesn't need it really!
I really hardly see it doable by a 747 or an A380 (rather common LHR
visitors) on a 5.5° slope! I tried it on Flight Sim, and the result was... well... arguable...!...
Sounds like a "calming down the crowds" article, than a really feasible idea to me, even if I always believed that steeper approach may be a good answer to fuel burn and noise chase...
If you can meet with triumph and disaster, and treat those two impostors just the same