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Well-known member
- Joined
- Dec 21, 2001
- Posts
- 6,137
ATL Pilot - sorry about getting off topic.
First, let me say how pleased I am to see you on this board with an ATC perspective. This kind of communication, whether formal, or informal, is VERY useful.
Second, the best information we ever got from recurrent training was the visit from the ATC folks. I know staffing is tight, but I hope they bring back that program.
Sharing information helps us get the big picture of what ATC needs in the way of flight profiles and aircraft performance. This is a more relevant issue with fuel costs going through the roof.
Some airlines are teaching flight profiles which are expected to cause flow problems (250KIAS idle descents, min drag) in an effort to save fuel. Then there are the "increase to 320, slow to 210, turn 90 degrees off course, expedite down," instructions which wreck any attempts at fuel efficiency.
While the most important consideration is not hitting another aircraft, I have heard many of the early descents for ATL are simply the result of controllers wanting to get the aircraft below and out of their airspace. Is there any truth to this?
You are a pilot, so I'm sure you have a handle on the way jets perform, but is there any training for the ATC folks that gives them the basics like:
> Most jets burn much more fuel at low altitude
> All jets go much slower at low altitude
> Airlines plan for something around 3 degree descent paths; going below this profile not only burns more and pollutes more, but also results in minimum fuel situations (which most often go undeclared and unreported).
This comes up more frequently than anyone wants to admit and more than anyone wants to talk about. But aside from the valid safety concerns, why can't ATC allow more reasonable descent profiles into NYC, and ATL?
Also, is there any good communication channels so that an airline that decides to change profiles does not suddenly surprise a controller by flying some unexpected profile? I'll admit, I was the guy trying to fly idle 4 degree descents when it seemed I could get away with it (out West mostly). The fuel & time savings were pretty impressive.
Here's for anything that results in giving less money to our enemies in the Middle East and makes our home town a cleaner place to live.
First, let me say how pleased I am to see you on this board with an ATC perspective. This kind of communication, whether formal, or informal, is VERY useful.
Second, the best information we ever got from recurrent training was the visit from the ATC folks. I know staffing is tight, but I hope they bring back that program.
Sharing information helps us get the big picture of what ATC needs in the way of flight profiles and aircraft performance. This is a more relevant issue with fuel costs going through the roof.
Some airlines are teaching flight profiles which are expected to cause flow problems (250KIAS idle descents, min drag) in an effort to save fuel. Then there are the "increase to 320, slow to 210, turn 90 degrees off course, expedite down," instructions which wreck any attempts at fuel efficiency.
While the most important consideration is not hitting another aircraft, I have heard many of the early descents for ATL are simply the result of controllers wanting to get the aircraft below and out of their airspace. Is there any truth to this?
You are a pilot, so I'm sure you have a handle on the way jets perform, but is there any training for the ATC folks that gives them the basics like:
> Most jets burn much more fuel at low altitude
> All jets go much slower at low altitude
> Airlines plan for something around 3 degree descent paths; going below this profile not only burns more and pollutes more, but also results in minimum fuel situations (which most often go undeclared and unreported).
This comes up more frequently than anyone wants to admit and more than anyone wants to talk about. But aside from the valid safety concerns, why can't ATC allow more reasonable descent profiles into NYC, and ATL?
Also, is there any good communication channels so that an airline that decides to change profiles does not suddenly surprise a controller by flying some unexpected profile? I'll admit, I was the guy trying to fly idle 4 degree descents when it seemed I could get away with it (out West mostly). The fuel & time savings were pretty impressive.
Here's for anything that results in giving less money to our enemies in the Middle East and makes our home town a cleaner place to live.
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