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airplanecrazy
Topic Author
Posts: 86
Joined: Thu May 11, 2006 8:09 am

Strange Routing NAX7015 LGW JFK

Sat Aug 23, 2014 5:14 pm

This flight is heading much farther North than others between LGW and JFK today. Any ideas why?

http://flightaware.com/live/flight/NAX7015

[Edited 2014-08-23 10:18:48]

Fixed LHR vs LGW


[Edited 2014-08-23 10:20:34]
 
RedChili
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Joined: Wed Jul 27, 2005 9:23 am

RE: Strange Routing NAX7015 LHR JFK

Sat Aug 23, 2014 5:17 pm

They're taking the scenic route over iceland's active volcano?
 
airplanecrazy
Topic Author
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RE: Strange Routing NAX7015 LGW JFK

Sat Aug 23, 2014 5:27 pm

Is NAX prohibited from flying over Ireland?

Just found out that isn't the reason by looking back at flights for past several days.

http://flightaware.com/live/flight/N...5/history/20140821/1720Z/EGKK/KJFK

[Edited 2014-08-23 10:47:02]
 
Cipango
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RE: Strange Routing NAX7015 LGW JFK

Sat Aug 23, 2014 10:24 pm

Quoting airplanecrazy (Reply 2):

Doesn't appear to be as it flew over Ireland on 21/08/14 and 14/08/14 (or 08/21/14 and 08/14/14 for the North Americans among us).
 
SpaceshipDC10
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RE: Strange Routing NAX7015 LGW JFK

Sat Aug 23, 2014 11:10 pm

Quoting airplanecrazy (Thread starter):
Any ideas why?

Could be wind related. Right now, as the flight is about to overfly BOS, Flightradar indicates that its ETA (landing) 31 minutes ahead of schedule while the aircraft left the gate nine minutes late and took off from LGW another 14 minutes later.

Flightaware for its part indicates that the flight is currently cruising at 470 kts instead of the 402 planned. Not long ago cruise speed was around 511 kts.
 
b747400erf
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RE: Strange Routing NAX7015 LGW JFK

Sat Aug 23, 2014 11:11 pm

That isn't a strange route, that looks normal depending on winds and NATs.
 
axelesgg
Posts: 208
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 6:45 am

Quoting airplanecrazy (Reply 2):

That would be strange since it is an Irish airline!
 
Max Q
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 7:38 am

Don't understand the filed 402 knots, that's way too slow for a 787.


490 -500 knots would be more like it.
 
GBOAB
Posts: 353
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 9:55 am

Seismic activity is continuing at the Bardarbunga volcano, about 30km away.

Airspace over the site has been closed, but all Icelandic airports currently remain open, authorities say. A Europe-wide alert has also been upgraded.

http://www.bbc.co.uk/news/world-europe-28913165
 
PlymSpotter
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 10:02 am

Quoting Max Q (Reply 7):
Don't understand the filed 402 knots, that's way too slow for a 787.


490 -500 knots would be more like it.

You are aware that this depends on headwinds, right?


Dan  
 
b747400erf
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 10:16 am

Quoting Max Q (Reply 7):
Don't understand the filed 402 knots, that's way too slow for a 787.


490 -500 knots would be more like it.

That looks about right for FL400 with strong Atlantic headwinds.
 
SpaceshipDC10
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 11:15 am

Quoting Max Q (Reply 7):
Don't understand the filed 402 knots, that's way too slow for a 787.

Here are some speed data from flights currently enroute west-northwest of Ireland:

LH440 (A380) 416 knots; BA175 (B744) 419; VS75 (B744) 409; LH430 (748) 414; AC881 (77W) 414; DL241 (A333) 397. The latter one is currently at FL360.
 
brilondon
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 11:49 am

I don't see anything strange about that routing. It seems to follow the standard great circle route from LGW to North America. What are you referring to?
 
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Pellegrine
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 12:00 pm

Aug 24 NAT West
 
4xear
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 1:51 pm

The routing does not seem strange. Maybe there was an MX issue that prevented the plane from flying full ETOPS and had to stay closer to land.

4x-ear
 
Mir
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 2:54 pm

Quoting PlymSpotter (Reply 9):
Quoting Max Q (Reply 7):
Don't understand the filed 402 knots, that's way too slow for a 787.


490 -500 knots would be more like it.

You are aware that this depends on headwinds, right?

The filed speed is true airspeed, not groundspeed, so it doesn't.

With that said, I don't really trust that sort of information to be accurate with Flightaware on flights from areas outside the US.

-Mir
 
PlymSpotter
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 2:57 pm

Quoting Mir (Reply 15):
The filed speed is true airspeed, not groundspeed, so it doesn't.

With that said, I don't really trust that sort of information to be accurate with Flightaware on flights from areas outside the US.

I'm told that filed speed is actually just average airspeed in most cases.


Dan  
 
canyonblue17
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 2:59 pm

Flew FCO to PHL one time and wound up much further north than this route. Pilot even told us we would be over Iceland and Greenland enroute. He said it was because of the winds. No big deal and it was quite beautiful flying over all the snow and ice.
 
Mir
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 3:18 pm

Quoting PlymSpotter (Reply 16):
I'm told that filed speed is actually just average airspeed in most cases.

It's the planned cruising true airspeed. It could be an average if it doesn't take into account planned altitude changes or temperature variations, but it would still be pretty accurate since neither of those make a large difference - certainly not big enough to make the normal airspeed in the high 400s go down to 402.

-Mir
 
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AirPacific747
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RE: Strange Routing NAX7015 LGW JFK

Sun Aug 24, 2014 10:32 pm

Quoting Max Q (Reply 7):

Don't understand the filed 402 knots, that's way too slow for a 787.


490 -500 knots would be more like it.

Sure you're an airline captain?
 
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Pellegrine
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RE: Strange Routing NAX7015 LGW JFK

Mon Aug 25, 2014 7:12 am

Quoting canyonblue17 (Reply 17):
Flew FCO to PHL one time and wound up much further north than this route. Pilot even told us we would be over Iceland and Greenland enroute. He said it was because of the winds. No big deal and it was quite beautiful flying over all the snow and ice.

By flying further north you can avoid the strongest parts of the jet stream depending on where it is that day. Makes sense to me.
 
Max Q
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Joined: Wed May 09, 2001 12:40 pm

RE: Strange Routing NAX7015 LGW JFK

Mon Aug 25, 2014 8:01 am

Quoting PlymSpotter (Reply 9):
You are aware that this depends on headwinds, right?
Quoting Mir (Reply 15):
The filed speed is true airspeed, not groundspeed, so it doesn't.

Exactly, try a little more research.
 
PlymSpotter
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Joined: Thu Jun 17, 2004 7:32 am

RE: Strange Routing NAX7015 LGW JFK

Mon Aug 25, 2014 10:09 am

Quoting Max Q (Reply 21):
Exactly, try a little more research.

My understanding is that when the filed airspeed is not available the online figure defaults to an average to still show something. Now that may or may not be correct, perhaps you can assist by providing some research on how the site gathers information to clarify?


Dan  

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