#1
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"Passenger Planes on go-slow"
http://www.news.com.au/travel/story/...014090,00.html
Quote:
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#2
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I got around 5 new reservation bookings from TT over the last month saying they have added 5mins to their schedules. I take it they have followed suit
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#3
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Some questiosn regarding this issue.
How can adding 5 minutes make a decent impact on fuel conservation? Would I be correct in saying that the savings can be made by either having a reduced cruise speed, or finding altitude conditons / prevailing winds providing faster ground speed?. I would have thought that a more gradual reduction from cruise speed to approach speed, as opposed to a more sudden deceleration (constant decel the speedbrake etc)would save more fuel? Isnt this all out the window when it comes to spacing by approach controllers, slots and the like? As per AA, are their any a/c that could be parked due to excessive consumption / or changed to different routes? |
#4
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Speaking for the 767.
Cruise has been reduced from Cost Index 40 to 20. Descent has been slowed from 290kts to Econ speed, usually 265kts. Savings from this are quite small on an individual flight basis, but across a whole fleet on an annual basis can be quite large. And yes, we 'waste' far far more fuel due to congestion than we could ever hope to save by slowing down. |
#5
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Adrian,
I think we will see the 747-300's on the PER-MEL/SYD pulled out as soon as possible, despite other things like age, they suck up a lot of fuel |
#6
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Definitely noticed this on my sectors over the last month or so. One of my captains last week explained to us in briefing that the reason for our OOL-SYD flight now just topping the 1 hr mark, rising to 64 min (normally about 56-58 min), was because of a go-slow FSO issued to all tech crew.
I asked about the Cost Index used (a time vs cost measure which affects the cruise speed depending on what number is input) and it has been dropped from an already low 30 down to just 10. That puts our cruise speed around Mach 0.76 whereas normal cruise speed for the A320 is about 0.78. If by doing this it adds only 2-6 minutes to total flight time, which is hardly noticeable, but can in turn save a lot of dollars in fuel costs then why not. |
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