Good discussion
KKK
why? would anyone wants lots of high-speed traffic in a terminal (sic) zone ? shudder
Sequencing. Tactical planning early can and does avoid circuit area problems such as having to fly wider or extra legs of the circuit to follow other traffic. An aircraft in the air less time, is less likely to conflict with other traffic. Granted, this really only applies to the approach airspace sequencing, by the time the aircraft reaches the circuit area and surrounds, the speed profile is well back. Fitting circuit traffic around arrivals [even higher speed ones] is relatively easy by comparison.
Early sequencing [speed control] in IMC conditions can mean the difference between no delay passing the IAF [as opposed to a pattern] for following traffic.
In general terms these timings can amount to between 2 [in VMC] -10 [in IMC] mins difference in flight time savings per flight, particularlly where an Instrument approach [say ILS] is to be flown. The speed reductions necessary from the IAF onwards are a given, however, If enough longitudinal spacing can be obtained prior to the IAF, well you get the picture.
That said, the bird strike issue is a valid part of the discussion. Migratory birds often cruise below A050, Raptors are often into the flight levels. Whilst not in anyway diminishing this very important issue, perhaps the reality speaks that 270kts below A050 might be more realistic given that even 'hoons'
will be slowing up by this point.
Regarding the higher flying feathered friends. Until an onboard radar can detect these beasties, it remains a risk, including Above A100 where aircraft are
not limited to 250kts.
In recent years, a turbo-prop operator in Australia [DHC8's] has been using landing lights set to alternate flashing during lower level day op's.
Have they suffered any strikes since adopting this procedure?
I understand the flashing attracts the attention of our feathered cousins, who then pay attention, and get the hell outa dodge in time.
It probably makes them more visible to the unfeathered traffic as well.