AVSIG: PANC-VHHH at FL400 wwswsigarch.jpg (7236 bytes)

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Bill Bridges - 9S1
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Reged: 05/17/04
Posts: 6008
Loc: 9S1
PANC-VHHH at FL400
      #275580 - 12/08/09 09:07 PM

I was looking at the flights tonight gong from PANC to VHHH and noticed that 90% of the B744 freighters were filing for FL400 with one at FL430. Since the B744 has to be pretty light to get to FL400, is this because of the winds or more "signs of the times"?

Bill


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B. Butler (Oregonian)
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Reged: 05/15/04
Posts: 9760
Loc: Ashland, Oregon
Re: PANC-VHHH at FL400 [Re: Bill Bridges - 9S1]
      #275587 - 12/08/09 09:46 PM

Bill,

What viewer were you using? In my experience, at both SEA and ANC, it takes a step-climb profile, starting out at 280 or 300 and working their way up as they burn off fuel. Was that what you were seeing or were they actually at 400 early in the trip?

OtherBill

--------------------
"Why not be a nihilist? A man has to believe in something."
-Bernie Gunther


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Bill Bridges - 9S1
Top Gun


Reged: 05/17/04
Posts: 6008
Loc: 9S1
Re: PANC-VHHH at FL400 [Re: B. Butler (Oregonian)]
      #275589 - 12/08/09 10:56 PM

Bill,

Quote:

What viewer were you using? In my experience, at both SEA and ANC, it takes a step-climb profile, starting out at 280 or 300 and working their way up as they burn off fuel. Was that what you were seeing or were they actually at 400 early in the trip?





I think it was the final altitude in the flight plan. I saw the flight plans on Flight Aware.

Bill


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Richard Duxbury (Dux)
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Reged: 05/15/04
Posts: 5468
Loc: Minneapolis/Tucson
Re: PANC-VHHH at FL400 [Re: Bill Bridges - 9S1]
      #275619 - 12/09/09 02:05 PM

Well they must have indeed been light to get to that altitude any time after takeoff.

Strong jet stream can sometimes be reduced of you flight above the core -if you can.

I only flew the older B747-200, and most of the time we were quite heavy and could not get much above 310-330 after takeoff for a few hours.

I know the -400 has more power.

Regards,

Dux


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Bill Bridges - 9S1
Top Gun


Reged: 05/17/04
Posts: 6008
Loc: 9S1
Re: PANC-VHHH at FL400 [Re: Richard Duxbury (Dux)]
      #275634 - 12/09/09 04:52 PM

Captain,

Quote:

Well they must have indeed been light to get to that altitude any time after takeoff.





I went back and looked at some of the flight numbers. For example CX freighters normally have two digit flight numbers such as 91. There are some with four digits such as 2091.This would lead me to believe that the four digit flight numbers are extra freight runs for the holidays. If I was guessing they are coming in from VHHH full of Holiday cheer for the big PX, and going home mostly empty. As you know IOUs don't weigh much. This would be a good case study for the trade deficits/balance of payments study. Most likely a direct correlation between the altitude of freighters flying between PANC and VHHH and the trade deficit. High and empty going west, and low and heavy going east. The logic is pure. :-).

Bill


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