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UA 777-200 Question  
User currently offlineN83SF From United States of America, joined Dec 2008, 72 posts, RR: 0
Posted (5 years 1 month 1 week 16 hours ago) and read 2940 times:

Can a United 777-200 make a 14hr 4min flight without a fuel stop?
The link of the flight on flightaware is posted here: http://flightaware.com/live/flight/U...1/history/20090624/2055Z/OKBK/KIAD
If it can make the trip without a fuel stop, what is the maximum distance it can go?


N83SF
7 replies: All unread, jump to last
 
User currently offlineUal777 From United States of America, joined Aug 2003, 1546 posts, RR: 5
Reply 1, posted (5 years 1 month 1 week 16 hours ago) and read 2925 times:

Yes. KWI/DXB to IAD do it everyday. They do however go out weight restricted on occasion. The routes are typically up to 15 hours flying time and UA uses their 777-222/ER models on the runs.


It is always darkest before the sun comes up.
User currently offlinePellegrine From United States of America, joined Mar 2007, 2362 posts, RR: 8
Reply 2, posted (5 years 1 month 1 week 16 hours ago) and read 2921 times:

Quoting N83SF (Thread starter):
Can a United 777-200 make a 14hr 4min flight without a fuel stop?

777-200ER yes. Frequently though these block times are 30+ minutes more than the flight times actually are. UA803 IAD-NRT 772ER is blocked as 13:45, but has been blocked as high as 14:05 or 14:10 AFAIK...usually takes right around 13 hours and change.

Quoting N83SF (Thread starter):
If it can make the trip without a fuel stop, what is the maximum distance it can go?

Don't know because there has been some discussion in the past about what UA's specific 772ER MTOW is and the thrust level of their PW4090 engines, AFAIK. 777-200ERs with the maximum MTOW (656,000 lbs) can fly 15+ hours and 7,700nm still winds.

[Edited 2009-06-24 01:10:16]


oh boy!!!
User currently offlineBMI727 From United States of America, joined Feb 2009, 15719 posts, RR: 26
Reply 3, posted (5 years 1 month 1 week 16 hours ago) and read 2899 times:



Quoting Pellegrine (Reply 2):
AFAIK. 777-200ERs with the maximum MTOW (656,000 lbs) can fly 15+ hours and 7,700nm still winds.

That sounds about right, but of course the 777-200LR becomes more efficient somewhere in the neighborhood of 5,000-6,000nm. I don't know where UA's routes fall in there specifcally, but I imagine a few at least approach that range. But that's a different thread all together.



Why do Aerospace Engineering students have to turn things in on time?
User currently offlineN83SF From United States of America, joined Dec 2008, 72 posts, RR: 0
Reply 4, posted (5 years 1 month 1 week 16 hours ago) and read 2887 times:

Thanks for the help. What aircraft type does this route run, as flightaware and UA.com say a 777-200.


N83SF
User currently offlineBMI727 From United States of America, joined Feb 2009, 15719 posts, RR: 26
Reply 5, posted (5 years 1 month 1 week 16 hours ago) and read 2874 times:

It would be a -200ER. The A models don't have enough legs and I think that those are mostly used on flights to Europe and Hawaii. The Middle East and Asia flights generally require the higher weight version. UA does not have any LRs, in fact DL is the only American carrier that has them.

I should also note, that the majority of 777-200s are ER versions. Relatively few of the original -200s were built and that model is not even offered anymore.



Why do Aerospace Engineering students have to turn things in on time?
User currently offlinePellegrine From United States of America, joined Mar 2007, 2362 posts, RR: 8
Reply 6, posted (5 years 1 month 1 week 16 hours ago) and read 2874 times:



Quoting BMI727 (Reply 3):
That sounds about right, but of course the 777-200LR becomes more efficient somewhere in the neighborhood of 5,000-6,000nm. I don't know where UA's routes fall in there specifcally, but I imagine a few at least approach that range. But that's a different thread all together.

Haven't ran numbers on what is more efficient where, but I guess that sounds right keeping in mind the 77L is heavier than the 77E.

77E:


77L:
http://i43.tinypic.com/aw9nc5.jpg

Sorry the 77L/W charts don't scale well under 100% in Acrobat.

These are available at the "Airplane Characteristics for Airport Planning" section of Boeing.com.



oh boy!!!
User currently offlineUal777 From United States of America, joined Aug 2003, 1546 posts, RR: 5
Reply 7, posted (5 years 1 month 1 week 15 hours ago) and read 2867 times:



Quoting Pellegrine (Reply 2):

Don't know because there has been some discussion in the past about what UA's specific 772ER MTOW is and the thrust level of their PW4090 engines, AFAIK. 777-200ERs with the maximum MTOW (656,000 lbs) can fly 15+ hours and 7,700nm still winds.

The engines are 90,000 lbs. a side on the 200/ERs.

Quoting N83SF (Reply 4):
Thanks for the help. What aircraft type does this route run, as flightaware and UA.com say a 777-200.

see my first post (and your first reply)  Wink .



It is always darkest before the sun comes up.
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